{"id":549,"date":"2024-10-04T15:40:54","date_gmt":"2024-10-04T14:40:54","guid":{"rendered":"https:\/\/blog.citrus-lime.com\/crgh\/?p=549"},"modified":"2026-03-04T15:36:22","modified_gmt":"2026-03-04T15:36:22","slug":"hydrostatic-head-waterproof-tents-jackets-here-is-what-you-need-to-know","status":"publish","type":"post","link":"https:\/\/blog.citrus-lime.com\/crgh\/2024\/10\/04\/hydrostatic-head-waterproof-tents-jackets-here-is-what-you-need-to-know\/","title":{"rendered":"Hydrostatic Head: Waterproof Tents &amp; Jackets Here is What You Need to Know"},"content":{"rendered":"\n<p><em>Updated December 2025 by the Crib Goch Outdoor team \u2014 based on real wet-weather experience in Eryri.<\/em><\/p>\n\n\n\n<p>When buying tents, jackets or camping gear, you\u2019ll often see the term <strong>Hydrostatic Head (HH)<\/strong> thrown around. But what does it actually mean \u2014 and how waterproof is <em>2000mm<\/em>, <em>5000mm<\/em> or <em>10,000mm<\/em> in the real world?<\/p>\n\n\n\n<p>This updated guide explains HH in simple terms, how to compare ratings, and what level of waterproofness you really need for UK weather.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n<div class=\"wp-block-aioseo-table-of-contents\"><ul><li><a class=\"aioseo-toc-item\" href=\"#aioseo-does-a-higher-hydrostatic-head-mean-better-waterproofing\">Does a higher hydrostatic head mean better waterproofing?<\/a><\/li><li><a class=\"aioseo-toc-item\" href=\"#0-what-is-hydrostatic-head-\">What Is Hydrostatic Head?<\/a><ul><li><a class=\"aioseo-toc-item\" href=\"#aioseo-why-do-ground-sheets-need-a-higher-hh\">Why do ground sheets need a higher HH?<\/a><\/li><li><a class=\"aioseo-toc-item\" href=\"#aioseo-is-1000mm-enough-for-light-camping\">Is 1000mm enough for light camping?<\/a><\/li><li><a class=\"aioseo-toc-item\" href=\"#aioseo-does-a-tent-with-higher-hh-last-longer\">Does a tent with higher HH last longer?<\/a><\/li><li><a class=\"aioseo-toc-item\" href=\"#aioseo-why-does-condensation-occur-even-in-a-high-hh-tent\">Why does condensation occur even in a high HH tent?<\/a><\/li><\/ul><\/li><li><a class=\"aioseo-toc-item\" href=\"#1-what-is-considered-waterproof-for-jackets-\">What Is Considered Waterproof for Jackets?<\/a><ul><\/ul><\/li><li><a class=\"aioseo-toc-item\" href=\"#4-a-note-on-paramo-amp-waterproof-ratings-\">A Note on Paramo &amp; Waterproof Ratings<\/a><ul><\/ul><\/li><li><a class=\"aioseo-toc-item\" href=\"#6-why-hydrostatic-head-isn%E2%80%99t-the-whole-story-for-waterproof-jackets-\">Why Hydrostatic Head Isn\u2019t the Whole Story for Waterproof Jackets<\/a><ul><\/ul><\/li><li><a class=\"aioseo-toc-item\" href=\"#8-hydrostatic-head-comparison-for-tents-\">Hydrostatic Head Comparison for Tents:<\/a><ul><\/ul><\/li><li><a class=\"aioseo-toc-item\" href=\"#14-real-world-implications-when-does-hh-actually-matter-with-tents-\">Real-World Implications: When Does HH Actually Matter with Tents?<\/a><ul><\/ul><\/li><li><a class=\"aioseo-toc-item\" href=\"#19-the-downsides-of-very-high-hydrostatic-head-ratings-for-tents-\">The Downsides of Very High Hydrostatic Head Ratings for Tents<\/a><ul><\/ul><\/li><li><a class=\"aioseo-toc-item\" href=\"#24-what-hydrostatic-head-rating-do-you-actually-need\">What Hydrostatic Head Rating Do You Actually Need?<\/a><ul><\/ul><\/li><li><a class=\"aioseo-toc-item\" href=\"#27-final-takeaway\">Final Takeaway<\/a><\/li><li><a class=\"aioseo-toc-item\" href=\"#aioseo-hydrostatic-head-faq-updated-2025\">Hydrostatic Head FAQ (Updated 2025)<\/a><\/li><\/ul><\/div>\n\n\n<h2 class=\"wp-block-heading\" id=\"0-what-is-hydrostatic-head-\"><strong>What Is Hydrostatic Head?<\/strong><\/h2>\n\n\n\n<p>Hydrostatic Head is a <strong>measure of how waterproof a fabric is<\/strong>. In testing, a column of water is placed on top of the fabric and slowly increased in height. The measurement (in millimetres) indicates <strong>how tall the water column can get before the fabric leaks<\/strong>.<\/p>\n\n\n\n<p>So:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>1000mm HH = leaks at 1 metre of water pressure<\/strong><\/li>\n\n\n\n<li><strong>2000mm HH = leaks at 2 metres of water pressure<\/strong><\/li>\n\n\n\n<li><strong>5000mm HH = leaks at 5 metres of water pressure<\/strong>, and so on.<\/li>\n<\/ul>\n\n\n\n<p>This sounds unrealistic \u2014 you\u2019re not standing under a two-metre pillar of water \u2014 but HH is actually a good way of simulating <strong>wind-driven rain, pressure from leaning, kneeling, or heavy downpours<\/strong>.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<figure class=\"wp-block-image alignwide size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1500\" height=\"843\" src=\"https:\/\/blog.citrus-lime.com\/crgh\/wp-content\/uploads\/sites\/106\/2024\/10\/Mood_SS23_-Daniel-Blom_Hydratic_1500_EXP_2026-01-09-edited.jpg\" alt=\"\" class=\"wp-image-560\" srcset=\"https:\/\/blog.citrus-lime.com\/crgh\/wp-content\/uploads\/sites\/106\/2024\/10\/Mood_SS23_-Daniel-Blom_Hydratic_1500_EXP_2026-01-09-edited.jpg 1500w, https:\/\/blog.citrus-lime.com\/crgh\/wp-content\/uploads\/sites\/106\/2024\/10\/Mood_SS23_-Daniel-Blom_Hydratic_1500_EXP_2026-01-09-edited-300x169.jpg 300w, https:\/\/blog.citrus-lime.com\/crgh\/wp-content\/uploads\/sites\/106\/2024\/10\/Mood_SS23_-Daniel-Blom_Hydratic_1500_EXP_2026-01-09-edited-1024x575.jpg 1024w, https:\/\/blog.citrus-lime.com\/crgh\/wp-content\/uploads\/sites\/106\/2024\/10\/Mood_SS23_-Daniel-Blom_Hydratic_1500_EXP_2026-01-09-edited-768x432.jpg 768w\" sizes=\"auto, (max-width: 1500px) 100vw, 1500px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"1-what-is-considered-waterproof-for-jackets-\"><strong>What Is Considered Waterproof for Jackets?<\/strong><\/h2>\n\n\n\n<p>When it comes to <strong>waterproof jackets<\/strong>, hydrostatic head ratings need to be <strong>much higher<\/strong> than for tents.<\/p>\n\n\n\n<p>Unlike a tent flysheet, a jacket is constantly exposed to:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Shoulder-strap pressure from a rucksack<\/li>\n\n\n\n<li>Arm movement and fabric flex<\/li>\n\n\n\n<li>Wind-driven rain at speed<\/li>\n\n\n\n<li>Abrasion from rock, vegetation and pack contact<\/li>\n<\/ul>\n\n\n\n<p>All of these dramatically increase water pressure on the fabric.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"2-realistically-in-uk-conditions\">Realistically, in UK conditions:<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Below 5,000mm HH<\/strong><br>\u2022 Not suitable for prolonged rain<br>\u2022&nbsp;Likely to wet through under pack straps<br>\u2022 Only appropriate for emergency shells or dry-weather use<\/li>\n\n\n\n<li><strong>6,000\u201310,000mm HH<\/strong><br>\u2022 Entry-level waterproof jackets<br>\u2022 Fine for showers and short hill days<br>\u2022 May struggle in sustained Welsh rain<\/li>\n\n\n\n<li><strong>10,000\u201315,000mm HH<\/strong><br>\u2022 Suitable for regular UK hillwalking<br>\u2022 Handles pack pressure and steady rain<br>\u2022 Good balance of waterproofing and breathability<\/li>\n\n\n\n<li><strong>20,000mm+ HH (or membrane equivalent)<\/strong><br>\u2022 Proper mountain waterproofs<br>\u2022 Designed for prolonged rain, wind and exposure<br>\u2022 Typical of Gore-Tex, eVent and similar membranes<\/li>\n<\/ul>\n\n\n\n<p><strong>In short:<\/strong><br>What\u2019s \u201cwaterproof\u201d for a tent flysheet is <strong>not waterproof enough for a jacket<\/strong> you\u2019re moving in all day.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"3-hydrostatic-head-for-jackets-a-quick-guide-\"><strong>Hydrostatic Head for Jackets: A Quick Guide<\/strong><\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Use Case<\/th><th>Recommended HH<\/th><\/tr><\/thead><tbody><tr><td>Emergency shell \/ dry weather<\/td><td>5,000\u20136,000mm<\/td><\/tr><tr><td>General UK hillwalking<\/td><td>10,000\u201315,000mm<\/td><\/tr><tr><td>Mountain &amp; winter use<\/td><td>20,000mm+<\/td><\/tr><tr><td>High-output \/ all-day rain<\/td><td>Membrane-based systems<\/td><\/tr><tr><td>High-output \/ all-day rain<\/td><td>Paramo Directional Waterproofs<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"4-a-note-on-paramo-amp-waterproof-ratings-\"><strong>A Note on Paramo &amp; Waterproof Ratings<\/strong><\/h2>\n\n\n\n<p>Not all waterproof clothing uses a membrane \u2014 and Paramo is the most well-known example of this.<\/p>\n\n\n\n<p>Unlike traditional waterproof jackets (such as Gore-Tex or eVent), <strong>Paramo does not rely on a hydrostatic head\u2013rated membrane<\/strong>. Instead, it uses a <strong>Directional Nikwax Analogy system<\/strong>, which works by actively moving liquid water away from the body rather than blocking it.<\/p>\n\n\n\n<p>In simple terms:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Membrane jackets<\/strong> stop water getting in using a waterproof barrier (measured in mm HH).<\/li>\n\n\n\n<li><strong>Paramo garments<\/strong> move moisture outwards using a pump-liner system, even when the fabric is fully wetted out.<\/li>\n<\/ul>\n\n\n\n<p>Because of this, <strong>Paramo jackets are not quoted with a hydrostatic head rating<\/strong> \u2014 and directly comparing them to a \u201c10,000mm\u201d or \u201c20,000mm\u201d jacket isn\u2019t meaningful.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"5-how-paramo-performs-in-the-real-world\">How Paramo Performs in the Real World<\/h4>\n\n\n\n<p>In prolonged UK rain \u2014 especially in places like <strong>Eryri, the Lake District and Scotland<\/strong> \u2014 Paramo is:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Exceptionally good at staying comfortable when worn all day<\/li>\n\n\n\n<li>Very resistant to internal dampness caused by sweat<\/li>\n\n\n\n<li>Easy to maintain, as waterproofing can be renewed with Nikwax treatments<\/li>\n<\/ul>\n\n\n\n<p>However:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Paramo garments are generally <strong>heavier and bulkier<\/strong> than membrane shells<\/li>\n\n\n\n<li>They are <strong>less packable<\/strong>, making them better suited to wearing all day rather than carrying \u201cjust in case\u201d<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"2560\" height=\"1439\" src=\"https:\/\/blog.citrus-lime.com\/crgh\/wp-content\/uploads\/sites\/106\/2025\/12\/Paramobadge2-edited-scaled.jpg\" alt=\"How to waterproof your waterproof jacket\" class=\"wp-image-1137\" srcset=\"https:\/\/blog.citrus-lime.com\/crgh\/wp-content\/uploads\/sites\/106\/2025\/12\/Paramobadge2-edited-scaled.jpg 2560w, https:\/\/blog.citrus-lime.com\/crgh\/wp-content\/uploads\/sites\/106\/2025\/12\/Paramobadge2-edited-300x169.jpg 300w, https:\/\/blog.citrus-lime.com\/crgh\/wp-content\/uploads\/sites\/106\/2025\/12\/Paramobadge2-edited-1024x576.jpg 1024w, https:\/\/blog.citrus-lime.com\/crgh\/wp-content\/uploads\/sites\/106\/2025\/12\/Paramobadge2-edited-768x432.jpg 768w, https:\/\/blog.citrus-lime.com\/crgh\/wp-content\/uploads\/sites\/106\/2025\/12\/Paramobadge2-edited-1536x863.jpg 1536w, https:\/\/blog.citrus-lime.com\/crgh\/wp-content\/uploads\/sites\/106\/2025\/12\/Paramobadge2-edited-2048x1151.jpg 2048w\" sizes=\"auto, (max-width: 2560px) 100vw, 2560px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"6-why-hydrostatic-head-isn%E2%80%99t-the-whole-story-for-waterproof-jackets-\"><strong>Why Hydrostatic Head Isn\u2019t the Whole Story for Waterproof Jackets<\/strong><\/h2>\n\n\n\n<p>Hydrostatic Head (HH) is a useful indicator of waterproofness \u2014 but for&nbsp;<strong>jackets<\/strong>, it\u2019s only part of the picture. Two jackets with the same HH rating can perform very differently on the hill, especially in wet, windy UK conditions.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"7-the-takeaway-\"><strong>The Takeaway<\/strong><\/h3>\n\n\n\n<p>Hydrostatic Head tells you how waterproof a fabric is \u2014<br><strong>but how dry you stay depends on the whole jacket.<\/strong><\/p>\n\n\n\n<p>For UK hillwalking and mountain use, prioritise:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Good construction<\/li>\n\n\n\n<li>Fully taped seams<\/li>\n\n\n\n<li>Reliable DWR<\/li>\n\n\n\n<li>Sensible cut and fit<\/li>\n\n\n\n<li>Breathability that matches your activity<\/li>\n\n\n\n<li>Care, repair and re-proofing.<\/li>\n<\/ul>\n\n\n\n<p>That\u2019s why we always recommend choosing waterproof jackets based on&nbsp;<strong>use case and conditions<\/strong>, not just the biggest number on the label.<\/p>\n\n\n<div style=\"gap: 20px;\" class=\"align-button-center ub-buttons orientation-button-row ub-flex-wrap wp-block-ub-button\" id=\"ub-button-fb7d03eb-fd3e-445f-8c5f-6051c98de51c\"><div class=\"ub-button-container\">\n\t\t\t<a href=\"https:\/\/www.cribgochoutdoor.com\/clothing--accessories\/clothing\/water-proof\" target=\"_blank\" rel=\"noopener noreferrer\" class=\"ub-button-block-main   ub-button-flex\" role=\"button\" style=\"--ub-button-background-color: #313131; --ub-button-color: #ffffff; --ub-button-border: none; --ub-button-hover-background-color: #313131; --ub-button-hover-color: #ffffff; --ub-button-hover-border: none; padding-top: 10px; padding-right: 10px; padding-bottom: 10px; padding-left: 10px; border-top-left-radius: 10px;; border-top-right-radius: 10px;; border-bottom-left-radius: 10px;; border-bottom-right-radius: 10px;; \">\n\t\t\t\t<div class=\"ub-button-content-holder\" style=\"flex-direction: row\">\n\t\t\t\t\t<span class=\"ub-button-block-btn\"><strong>Shop All Waterproof Clothing at Crib Goch Outdoor <\/strong><\/span>\n\t\t\t\t<\/div>\n\t\t\t<\/a>\n\t\t<\/div><\/div>\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<figure class=\"wp-block-image alignwide size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"2000\" height=\"1125\" src=\"https:\/\/blog.citrus-lime.com\/crgh\/wp-content\/uploads\/sites\/106\/2025\/12\/winter-tent-edited.jpg\" alt=\"Fjallraven Tent pitched in the snow\" class=\"wp-image-1144\" srcset=\"https:\/\/blog.citrus-lime.com\/crgh\/wp-content\/uploads\/sites\/106\/2025\/12\/winter-tent-edited.jpg 2000w, https:\/\/blog.citrus-lime.com\/crgh\/wp-content\/uploads\/sites\/106\/2025\/12\/winter-tent-edited-300x169.jpg 300w, https:\/\/blog.citrus-lime.com\/crgh\/wp-content\/uploads\/sites\/106\/2025\/12\/winter-tent-edited-1024x576.jpg 1024w, https:\/\/blog.citrus-lime.com\/crgh\/wp-content\/uploads\/sites\/106\/2025\/12\/winter-tent-edited-768x432.jpg 768w, https:\/\/blog.citrus-lime.com\/crgh\/wp-content\/uploads\/sites\/106\/2025\/12\/winter-tent-edited-1536x864.jpg 1536w\" sizes=\"auto, (max-width: 2000px) 100vw, 2000px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"8-hydrostatic-head-comparison-for-tents-\"><strong>Hydrostatic Head Comparison for Tents:<\/strong><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"9-1000mm-hh-\"><strong>1000mm HH<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Light showers<\/li>\n\n\n\n<li>Picnic shelters \/ fair-weather use<\/li>\n\n\n\n<li>NOT ideal for UK camping unless conditions are mild<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"10-2000mm-hh-\"><strong>2000mm HH<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Standard level for \u201cwaterproof\u201d tents in the UK<\/li>\n\n\n\n<li>Handles heavy rain and wind<\/li>\n\n\n\n<li>The most common waterproof rating for general outdoor gear<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"11-3000%E2%80%935000mm-hh-\"><strong>3000\u20135000mm HH<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Better for <strong>sustained rain<\/strong>, strong winds and rough weather<\/li>\n\n\n\n<li>Recommended for UK campsites where weather is unpredictable<\/li>\n\n\n\n<li>Great for family tents and higher-pressure areas<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"12-5000mm-hh-groundsheets-\"><strong>5000mm+ HH (Groundsheets)<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Required for <strong>floors<\/strong>, because body weight dramatically increases water pressure<\/li>\n\n\n\n<li>Prevents seep-through when lying or kneeling on soaked ground<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"13-10000mm-hh-and-higher-\"><strong>10,000mm HH and higher<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Used in expedition tents<\/li>\n\n\n\n<li>Handles sheeting rain, storms, and physical pressure on the fabric<\/li>\n\n\n\n<li>Often heavier and less breathable<\/li>\n\n\n\n<li>Overkill for most UK summer camping<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"14-real-world-implications-when-does-hh-actually-matter-with-tents-\"><strong>Real-World Implications: When Does HH Actually Matter with Tents?<\/strong><\/h2>\n\n\n\n<p>Hydrostatic Head is only <strong>one part<\/strong> of staying dry. In the hills around Eryri, other factors play a huge role:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"15-1-wind-pressure-\"><strong>1. Wind pressure<\/strong><\/h3>\n\n\n\n<p>Wind pushes rain into the fabric, increasing pressure dramatically<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"16-2-contact-pressure-\"><strong>2. Contact pressure<\/strong><\/h3>\n\n\n\n<p>Leaning on a tent wall or kneeling on a groundsheet can <strong>exceed 2000mm easily<\/strong>, which is why floors need higher ratings.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"17-3-abrasion-and-ageing-\"><strong>3. Abrasion and ageing<\/strong><\/h3>\n\n\n\n<p>A 5000mm tent that\u2019s three years old may perform like a 2000mm tent if coatings have worn down.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"19-the-downsides-of-very-high-hydrostatic-head-ratings-for-tents-\"><strong>The Downsides of Very High Hydrostatic Head Ratings for Tents<\/strong><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"20-reduced-breathability-\"><strong>Reduced breathability<\/strong><\/h3>\n\n\n\n<p>Thicker waterproof coatings trap moisture inside, especially in humid climates like Eryri. This can cause:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Damp sleeping bags<\/li>\n\n\n\n<li>Condensation on tent walls<\/li>\n\n\n\n<li>Sweat build-up inside jackets<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"21-increased-weight-\"><strong>Increased weight<\/strong><\/h3>\n\n\n\n<p>Higher HH fabrics are heavier \u2014 important for backpackers.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"22-stiffer-handling-\"><strong>Stiffer handling<\/strong><\/h3>\n\n\n\n<p>Some high-HH tents feel more rigid and harder to pitch or pack.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"23-higher-cost-\"><strong>Higher cost<\/strong><\/h3>\n\n\n\n<p>More advanced coatings = higher price, often unnecessary for fair conditions.<\/p>\n\n\n<div style=\"gap: 20px;\" class=\"align-button-center ub-buttons orientation-button-row ub-flex-wrap wp-block-ub-button\" id=\"ub-button-11a95bd7-d2ad-4c55-9996-b2482e748472\"><div class=\"ub-button-container\">\n\t\t\t<a href=\"https:\/\/www.cribgochoutdoor.com\/tents\" target=\"_blank\" rel=\"noopener noreferrer\" class=\"ub-button-block-main   ub-button-flex\" role=\"button\" style=\"--ub-button-background-color: #313131; --ub-button-color: #ffffff; --ub-button-border: none; --ub-button-hover-background-color: #313131; --ub-button-hover-color: #ffffff; --ub-button-hover-border: none; padding-top: 10px; padding-right: 10px; padding-bottom: 10px; padding-left: 10px; border-top-left-radius: 10px;; border-top-right-radius: 10px;; border-bottom-left-radius: 10px;; border-bottom-right-radius: 10px;; \">\n\t\t\t\t<div class=\"ub-button-content-holder\" style=\"flex-direction: row\">\n\t\t\t\t\t<span class=\"ub-button-block-btn\"><strong>Shop All Tents at Crib Goch Outdoor <\/strong><\/span>\n\t\t\t\t<\/div>\n\t\t\t<\/a>\n\t\t<\/div><\/div>\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<figure class=\"wp-block-gallery alignwide has-nested-images columns-default is-cropped wp-block-gallery-1 is-layout-flex wp-block-gallery-is-layout-flex\">\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"1024\" data-id=\"563\" src=\"https:\/\/blog.citrus-lime.com\/crgh\/wp-content\/uploads\/sites\/106\/2024\/10\/square_mood_SS21_Lars_Schneider_Hydratic_SWE_40066_01_EXP_2025-08-31-1024x1024.jpg\" alt=\"\" class=\"wp-image-563\" srcset=\"https:\/\/blog.citrus-lime.com\/crgh\/wp-content\/uploads\/sites\/106\/2024\/10\/square_mood_SS21_Lars_Schneider_Hydratic_SWE_40066_01_EXP_2025-08-31-1024x1024.jpg 1024w, https:\/\/blog.citrus-lime.com\/crgh\/wp-content\/uploads\/sites\/106\/2024\/10\/square_mood_SS21_Lars_Schneider_Hydratic_SWE_40066_01_EXP_2025-08-31-300x300.jpg 300w, https:\/\/blog.citrus-lime.com\/crgh\/wp-content\/uploads\/sites\/106\/2024\/10\/square_mood_SS21_Lars_Schneider_Hydratic_SWE_40066_01_EXP_2025-08-31-150x150.jpg 150w, https:\/\/blog.citrus-lime.com\/crgh\/wp-content\/uploads\/sites\/106\/2024\/10\/square_mood_SS21_Lars_Schneider_Hydratic_SWE_40066_01_EXP_2025-08-31-768x768.jpg 768w, https:\/\/blog.citrus-lime.com\/crgh\/wp-content\/uploads\/sites\/106\/2024\/10\/square_mood_SS21_Lars_Schneider_Hydratic_SWE_40066_01_EXP_2025-08-31-370x370.jpg 370w, https:\/\/blog.citrus-lime.com\/crgh\/wp-content\/uploads\/sites\/106\/2024\/10\/square_mood_SS21_Lars_Schneider_Hydratic_SWE_40066_01_EXP_2025-08-31.jpg 1500w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"1024\" data-id=\"564\" src=\"https:\/\/blog.citrus-lime.com\/crgh\/wp-content\/uploads\/sites\/106\/2024\/10\/square_mood_SS21_Lars_Schneider_Hydratic_SWE_40239_01_EXP_2025-08-31-1024x1024.jpg\" alt=\"\" class=\"wp-image-564\" srcset=\"https:\/\/blog.citrus-lime.com\/crgh\/wp-content\/uploads\/sites\/106\/2024\/10\/square_mood_SS21_Lars_Schneider_Hydratic_SWE_40239_01_EXP_2025-08-31-1024x1024.jpg 1024w, https:\/\/blog.citrus-lime.com\/crgh\/wp-content\/uploads\/sites\/106\/2024\/10\/square_mood_SS21_Lars_Schneider_Hydratic_SWE_40239_01_EXP_2025-08-31-300x300.jpg 300w, https:\/\/blog.citrus-lime.com\/crgh\/wp-content\/uploads\/sites\/106\/2024\/10\/square_mood_SS21_Lars_Schneider_Hydratic_SWE_40239_01_EXP_2025-08-31-150x150.jpg 150w, https:\/\/blog.citrus-lime.com\/crgh\/wp-content\/uploads\/sites\/106\/2024\/10\/square_mood_SS21_Lars_Schneider_Hydratic_SWE_40239_01_EXP_2025-08-31-768x768.jpg 768w, https:\/\/blog.citrus-lime.com\/crgh\/wp-content\/uploads\/sites\/106\/2024\/10\/square_mood_SS21_Lars_Schneider_Hydratic_SWE_40239_01_EXP_2025-08-31-370x370.jpg 370w, https:\/\/blog.citrus-lime.com\/crgh\/wp-content\/uploads\/sites\/106\/2024\/10\/square_mood_SS21_Lars_Schneider_Hydratic_SWE_40239_01_EXP_2025-08-31.jpg 1500w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"1024\" data-id=\"565\" src=\"https:\/\/blog.citrus-lime.com\/crgh\/wp-content\/uploads\/sites\/106\/2024\/10\/square_mood_SS21_Lars_Schneider_Hydratic_SWE_40206_01_EXP_2025-08-31-1024x1024.jpg\" alt=\"\" class=\"wp-image-565\" srcset=\"https:\/\/blog.citrus-lime.com\/crgh\/wp-content\/uploads\/sites\/106\/2024\/10\/square_mood_SS21_Lars_Schneider_Hydratic_SWE_40206_01_EXP_2025-08-31-1024x1024.jpg 1024w, https:\/\/blog.citrus-lime.com\/crgh\/wp-content\/uploads\/sites\/106\/2024\/10\/square_mood_SS21_Lars_Schneider_Hydratic_SWE_40206_01_EXP_2025-08-31-300x300.jpg 300w, https:\/\/blog.citrus-lime.com\/crgh\/wp-content\/uploads\/sites\/106\/2024\/10\/square_mood_SS21_Lars_Schneider_Hydratic_SWE_40206_01_EXP_2025-08-31-150x150.jpg 150w, https:\/\/blog.citrus-lime.com\/crgh\/wp-content\/uploads\/sites\/106\/2024\/10\/square_mood_SS21_Lars_Schneider_Hydratic_SWE_40206_01_EXP_2025-08-31-768x768.jpg 768w, https:\/\/blog.citrus-lime.com\/crgh\/wp-content\/uploads\/sites\/106\/2024\/10\/square_mood_SS21_Lars_Schneider_Hydratic_SWE_40206_01_EXP_2025-08-31-370x370.jpg 370w, https:\/\/blog.citrus-lime.com\/crgh\/wp-content\/uploads\/sites\/106\/2024\/10\/square_mood_SS21_Lars_Schneider_Hydratic_SWE_40206_01_EXP_2025-08-31.jpg 1500w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n<\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"24-what-hydrostatic-head-rating-do-you-actually-need\">What Hydrostatic Head Rating Do You Actually Need?<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"25-practical-uk-guidance\">Practical UK Guidance<\/h3>\n\n\n\n<figure class=\"wp-block-table alignwide\"><table class=\"has-fixed-layout\"><thead><tr><th>Use Case<\/th><th>Recommended HH<\/th><\/tr><\/thead><tbody><tr><td>Summer festivals \/ fair-weather camping<\/td><td>1500\u20132000mm<\/td><\/tr><tr><td>General UK camping<\/td><td>2000\u20133000mm flysheet<\/td><\/tr><tr><td>Backpacking tents<\/td><td>3000\u20135000mm flysheet<\/td><\/tr><tr><td>Any tent groundsheet<\/td><td>5000\u201310,000mm<\/td><\/tr><tr><td>Hillwalking 3 Season jackets<\/td><td>10,000\u201315,000mm<\/td><\/tr><tr><td>Mountain \/ winter jackets<\/td><td>20,000mm+ or Paramo<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"26-balancing-waterproofness-and-practicality\">Balancing Waterproofness and Practicality<\/h3>\n\n\n\n<p>Choose a waterproof rating that:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Matches the weather you expect<\/li>\n\n\n\n<li>Balances weight and packability<\/li>\n\n\n\n<li>Still allows breathability in humid UK conditions<\/li>\n<\/ul>\n\n\n\n<p>More waterproof isn\u2019t always better \u2014 it\u2019s about <strong>appropriate protection<\/strong>, not marketing numbers.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"27-final-takeaway\">Final Takeaway<\/h2>\n\n\n\n<p>Hydrostatic Head tells you how waterproof a fabric is <strong>but how dry you stay depends on the whole system.<\/strong><\/p>\n\n\n\n<p>For UK hillwalking and camping, prioritise:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Sensible HH ratings<\/li>\n\n\n\n<li>Good design and construction<\/li>\n\n\n\n<li>Breathability<\/li>\n\n\n\n<li>Maintenance and reproofing<\/li>\n<\/ul>\n\n\n\n<p>That\u2019s how you stay dry in real Welsh weather \u2014 not by chasing the biggest number on the label (or lack thereof when it comes to Paramo). If you need any advice you know what to do&#8230; <a href=\"https:\/\/www.cribgochoutdoor.com\/pages\/contact\/\" target=\"_blank\" rel=\"noopener\" title=\"\">Contact Crib Goch Outdoor here<\/a> <\/p>\n\n\n<div style=\"gap: 20px;\" class=\"align-button-center ub-buttons orientation-button-row ub-flex-wrap wp-block-ub-button\" id=\"ub-button-a01ff14f-6d5a-4dbe-bc4f-b960f679df7f\"><div class=\"ub-button-container\">\n\t\t\t<a href=\"https:\/\/www.cribgochoutdoor.com\/clothing--accessories\/water-proof\/adult\" target=\"_blank\" rel=\"noopener noreferrer\" class=\"ub-button-block-main   ub-button-flex\" role=\"button\" style=\"--ub-button-background-color: #313131; --ub-button-color: #ffffff; --ub-button-border: none; --ub-button-hover-background-color: #313131; --ub-button-hover-color: #ffffff; --ub-button-hover-border: none; padding-top: 10px; padding-right: 10px; padding-bottom: 10px; padding-left: 10px; border-top-left-radius: 10px;; border-top-right-radius: 10px;; border-bottom-left-radius: 10px;; border-bottom-right-radius: 10px;; \">\n\t\t\t\t<div class=\"ub-button-content-holder\" style=\"flex-direction: row\">\n\t\t\t\t\t<span class=\"ub-button-block-btn\"><strong>Shop All Waterproofs<\/strong><\/span>\n\t\t\t\t<\/div>\n\t\t\t<\/a>\n\t\t<\/div><\/div>\n\n<div style=\"gap: 20px;\" class=\"align-button-center ub-buttons orientation-button-row ub-flex-wrap wp-block-ub-button\" id=\"ub-button-7b1e5c4b-2155-447a-9d84-ae563c2242a6\"><div class=\"ub-button-container\">\n\t\t\t<a href=\"https:\/\/www.cribgochoutdoor.com\/blog\/2024\/05\/23\/keela-outdoor-clothing-ultimate-how-to-guide-clean-and-waterproof\/\" target=\"_blank\" rel=\"noopener noreferrer\" class=\"ub-button-block-main   ub-button-flex\" role=\"button\" style=\"--ub-button-background-color: #313131; --ub-button-color: #ffffff; --ub-button-border: none; --ub-button-hover-background-color: #313131; --ub-button-hover-color: #ffffff; --ub-button-hover-border: none; padding-top: 10px; padding-right: 10px; padding-bottom: 10px; padding-left: 10px; border-top-left-radius: 10px;; border-top-right-radius: 10px;; border-bottom-left-radius: 10px;; border-bottom-right-radius: 10px;; \">\n\t\t\t\t<div class=\"ub-button-content-holder\" style=\"flex-direction: row\">\n\t\t\t\t\t<span class=\"ub-button-block-btn\"><strong>Learn how to care for your Waterproofs<\/strong><\/span>\n\t\t\t\t<\/div>\n\t\t\t<\/a>\n\t\t<\/div><\/div>\n\n\n<h2 class=\"wp-block-heading\" id=\"aioseo-hydrostatic-head-faq-updated-2025\"><strong>Hydrostatic Head FAQ (Updated 2025)<\/strong><\/h2>\n\n\n\n<div class=\"wp-block-group is-vertical is-layout-flex wp-container-core-group-is-layout-8cf370e7 wp-block-group-is-layout-flex\">\n<div data-schema-only=\"false\" class=\"wp-block-aioseo-faq\"><h3 class=\"aioseo-faq-block-question\"><strong>Is 2000mm waterproof enough for heavy rain?<\/strong><\/h3><div class=\"aioseo-faq-block-answer\">\n<p>Yes and No.<\/p>\n\n\n\n<p>Yes \u2014 for tents <strong>2000mm HH is generally enough for sustained heavy rain<\/strong> in the UK, especially when combined with good tent design and taut pitching. It\u2019s the standard waterproof level for most 3-season tents. However, strong wind, ageing fabrics or poor seam sealing can reduce its real-world performance.<\/p>\n\n\n\n<p>No &#8211; for jackets we consider 6000mm HH to be the absolute minumum and only suitable for  lights showers. You should consider 10,000\u201315,000mm for a 3 Season waterproof jacket or 20,000+ for a mountain jacket where it takes a much higher Hydrostatic Head to be considered waterproof<\/p>\n<\/div><\/div>\n\n\n\n<div data-schema-only=\"false\" class=\"wp-block-aioseo-faq\"><h3 class=\"aioseo-faq-block-question\"><strong>Is hydrostatic head the same as waterproof?<\/strong><\/h3><div class=\"aioseo-faq-block-answer\">\n<p>Not exactly. Hydrostatic Head measures <strong>how much water pressure a fabric can withstand<\/strong> before leaking. A higher HH usually means the fabric is more waterproof, but factors like seam sealing, fabric age, condensation and pitch tension also affect how dry you\u2019ll stay.<\/p>\n<\/div><\/div>\n\n\n\n<div data-schema-only=\"false\" class=\"wp-block-aioseo-faq\"><h3 class=\"aioseo-faq-block-question\"><strong>What\u2019s a good hydrostatic head rating for tents?<\/strong><\/h3><div class=\"aioseo-faq-block-answer\">\n<p>For UK camping:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Flysheet:<\/strong> 2000\u20133000mm is ideal<br><\/li>\n\n\n\n<li><strong>Backpacking tents:<\/strong> 3000\u20135000mm for storm protection<br><\/li>\n\n\n\n<li><strong>Groundsheets:<\/strong> <strong>5000\u201310,000mm<\/strong> to handle sitting and kneeling pressure<\/li>\n<\/ul>\n\n\n\n<p>Most reputable tents fall in these ranges for a reason \u2014 they strike the best balance between waterproofness, weight and breathability.<\/p>\n<\/div><\/div>\n\n\n\n<div data-schema-only=\"false\" class=\"wp-block-aioseo-faq\"><h3 class=\"aioseo-faq-block-question\"><strong>Do jackets use hydrostatic head ratings?<\/strong><\/h3><div class=\"aioseo-faq-block-answer\">\n<p>Jackets technically use a similar measurement, but the outdoor industry often reports <strong>waterproof membranes<\/strong> (like Gore-Tex or eVent) differently \u2014 usually quoted around <strong>20,000mm+ equivalent<\/strong>. For walkers, the numbers matter less than the membrane quality and overall construction. Paramo for instance uses a different waterproof technology and measurement of waterproofness entirely, as it works in a different way<\/p>\n<\/div><\/div>\n\n\n\n<div data-schema-only=\"false\" class=\"wp-block-aioseo-faq\" id=\"aioseo-does-a-higher-hydrostatic-head-mean-better-waterproofing\"><h3 class=\"aioseo-faq-block-question\"><strong>Does a higher hydrostatic head mean better waterproofing?<\/strong><\/h3><div class=\"aioseo-faq-block-answer\">\n<p>Yes \u2014 but with trade-offs. Higher HH fabrics are more waterproof but usually <strong>heavier, stiffer and less breathable<\/strong>. For most UK adventures, 2000\u20133000mm is more than adequate for tents and ~10,000mm for Jackets &amp; Trousers<\/p>\n<\/div><\/div>\n\n\n\n<div data-schema-only=\"false\" class=\"wp-block-aioseo-faq\" id=\"aioseo-why-do-ground-sheets-need-a-higher-hh\"><h3 class=\"aioseo-faq-block-question\"><strong>Why do ground sheets need a higher HH?<\/strong><\/h3><div class=\"aioseo-faq-block-answer\">\n<p>Because <strong>body weight massively increases water pressure<\/strong>. Kneeling on wet ground can easily exceed 3000mm, which is why groundsheets typically start at <strong>5000mm<\/strong> to prevent seep-through.<\/p>\n<\/div><\/div>\n\n\n\n<div data-schema-only=\"false\" class=\"wp-block-aioseo-faq\" id=\"aioseo-is-1000mm-enough-for-light-camping\"><h3 class=\"aioseo-faq-block-question\"><strong>Is 1000mm enough for light camping?<\/strong><\/h3><div class=\"aioseo-faq-block-answer\">\n<p>Only in very fair weather. 1000mm HH can handle <strong>light showers<\/strong>, but not prolonged rain or windy conditions. For camping in Wales, Scotland or the Lake District, 2000mm is a safer minimum.<\/p>\n<\/div><\/div>\n\n\n\n<div data-schema-only=\"false\" class=\"wp-block-aioseo-faq\" id=\"aioseo-does-a-tent-with-higher-hh-last-longer\"><h3 class=\"aioseo-faq-block-question\"><strong>Does a tent with higher HH last longer?<\/strong><\/h3><div class=\"aioseo-faq-block-answer\">\n<p>Not always. Durability depends more on fabric quality, coating, UV exposure and how well a tent is cared for. A 5000mm tent left in the sun for weeks can degrade faster than a 2000mm tent stored correctly.<\/p>\n<\/div><\/div>\n\n\n\n<div data-schema-only=\"false\" class=\"wp-block-aioseo-faq\" id=\"aioseo-why-does-condensation-occur-even-in-a-high-hh-tent\"><h3 class=\"aioseo-faq-block-question\"><strong>Why does condensation occur even in a high HH tent?<\/strong><\/h3><div class=\"aioseo-faq-block-answer\">\n<p>Condensation is caused by <strong>humidity and temperature differences<\/strong>, not leaks. A tent can have a 10,000mm waterproof rating and still collect condensation if ventilation is poor.<\/p>\n<\/div><\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Updated December 2025 by the Crib Goch Outdoor team \u2014 based on real wet-weather experience in Eryri. When buying tents, jackets or camping gear, you\u2019ll often see the term Hydrostatic Head (HH) thrown around. But what does it actually mean \u2014 and how waterproof is 2000mm, 5000mm or 10,000mm in the real world? This updated<\/p>\n","protected":false},"author":157,"featured_media":556,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_price":"","_stock":"","_tribe_ticket_header":"","_tribe_default_ticket_provider":"","_tribe_ticket_capacity":"0","_ticket_start_date":"","_ticket_end_date":"","_tribe_ticket_show_description":"","_tribe_ticket_show_not_going":false,"_tribe_ticket_use_global_stock":"","_tribe_ticket_global_stock_level":"","_global_stock_mode":"","_global_stock_cap":"","_tribe_rsvp_for_event":"","_tribe_ticket_going_count":"","_tribe_ticket_not_going_count":"","_tribe_tickets_list":"[]","_tribe_ticket_has_attendee_info_fields":false,"footnotes":""},"categories":[103,3,4],"tags":[86,42],"class_list":{"0":"post-549","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-camping","8":"category-clothing","9":"category-guide","10":"tag-hydrostatic-head","11":"tag-waterproof"},"featured_image_src":"https:\/\/blog.citrus-lime.com\/crgh\/wp-content\/uploads\/sites\/106\/2024\/10\/Fjallraven-Waterproof.jpg","author_info":{"display_name":"cribgochoutdoor","author_link":"https:\/\/blog.citrus-lime.com\/crgh\/author\/cribgochoutdoorworld\/"},"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"Hydrostatic head explained: what 2000mm, 5000mm &amp; 10,000mm waterproof ratings mean for tents &amp; jackets. 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You should consider 10,000\u201315,000mm for a 3 Season waterproof jacket or 20,000+ for a mountain jacket where it takes a much higher Hydrostatic Head to be considered waterproof<\/p>","type":"aioseo\/faq"},{"hidden":false,"question":"<strong>Is hydrostatic head the same as waterproof?<\/strong>","schemaBlockId":"aioseo-mjd207lw","tagName":"h3","answer":"<p>Not exactly. Hydrostatic Head measures <strong>how much water pressure a fabric can withstand<\/strong> before leaking. A higher HH usually means the fabric is more waterproof, but factors like seam sealing, fabric age, condensation and pitch tension also affect how dry you\u2019ll stay.<\/p>","type":"aioseo\/faq"},{"hidden":false,"question":"<strong>What\u2019s a good hydrostatic head rating for tents?<\/strong>","schemaBlockId":"aioseo-mjd20tnj","tagName":"h3","answer":"<p>For UK camping:<\/p> <ul> <li><strong>Flysheet:<\/strong> 2000\u20133000mm is ideal<br><\/li> <li><strong>Backpacking tents:<\/strong> 3000\u20135000mm for storm protection<br><\/li> <li><strong>Groundsheets:<\/strong> <strong>5000\u201310,000mm<\/strong> to handle sitting and kneeling pressure<\/li> <\/ul> <p>Most reputable tents fall in these ranges for a reason \u2014 they strike the best balance between waterproofness, weight and breathability.<\/p>","type":"aioseo\/faq"},{"hidden":false,"question":"<strong>Do jackets use hydrostatic head ratings?<\/strong>","schemaBlockId":"aioseo-mjd21biy","tagName":"h3","answer":"<p>Jackets technically use a similar measurement, but the outdoor industry often reports <strong>waterproof membranes<\/strong> (like Gore-Tex or eVent) differently \u2014 usually quoted around <strong>20,000mm+ equivalent<\/strong>. For walkers, the numbers matter less than the membrane quality and overall construction. Paramo for instance uses a different waterproof technology and measurement of waterproofness entirely, as it works in a different way<\/p>","type":"aioseo\/faq"},{"hidden":false,"question":"<strong>Does a higher hydrostatic head mean better waterproofing?<\/strong>","schemaBlockId":"aioseo-mjd224ue","tagName":"h3","anchor":"aioseo-does-a-higher-hydrostatic-head-mean-better-waterproofing","answer":"<p>Yes \u2014 but with trade-offs. Higher HH fabrics are more waterproof but usually <strong>heavier, stiffer and less breathable<\/strong>. For most UK adventures, 2000\u20133000mm is more than adequate for tents and ~10,000mm for Jackets &amp; Trousers<\/p>","type":"aioseo\/faq"},{"hidden":false,"question":"<strong>Why do ground sheets need a higher HH?<\/strong>","schemaBlockId":"aioseo-mjd22dj3","tagName":"h3","anchor":"aioseo-why-do-ground-sheets-need-a-higher-hh","answer":"<p>Because <strong>body weight massively increases water pressure<\/strong>. Kneeling on wet ground can easily exceed 3000mm, which is why groundsheets typically start at <strong>5000mm<\/strong> to prevent seep-through.<\/p>","type":"aioseo\/faq"},{"hidden":false,"question":"<strong>Is 1000mm enough for light camping?<\/strong>","schemaBlockId":"aioseo-mjd22p6l","tagName":"h3","anchor":"aioseo-is-1000mm-enough-for-light-camping","answer":"<p>Only in very fair weather. 1000mm HH can handle <strong>light showers<\/strong>, but not prolonged rain or windy conditions. For camping in Wales, Scotland or the Lake District, 2000mm is a safer minimum.<\/p>","type":"aioseo\/faq"},{"hidden":false,"question":"<strong>Does a tent with higher HH last longer?<\/strong>","schemaBlockId":"aioseo-mjd233mk","tagName":"h3","anchor":"aioseo-does-a-tent-with-higher-hh-last-longer","answer":"<p>Not always. Durability depends more on fabric quality, coating, UV exposure and how well a tent is cared for. A 5000mm tent left in the sun for weeks can degrade faster than a 2000mm tent stored correctly.<\/p>","type":"aioseo\/faq"},{"hidden":false,"question":"<strong>Why does condensation occur even in a high HH tent?<\/strong>","schemaBlockId":"aioseo-mjd23f9t","tagName":"h3","anchor":"aioseo-why-does-condensation-occur-even-in-a-high-hh-tent","answer":"<p>Condensation is caused by <strong>humidity and temperature differences<\/strong>, not leaks. A tent can have a 10,000mm waterproof rating and still collect condensation if ventilation is poor.<\/p>","type":"aioseo\/faq"}],"customGraphs":[],"default":{"data":{"Article":[],"Course":[],"Dataset":[],"FAQPage":[],"Movie":[],"Person":[],"Product":[],"ProductReview":[],"Car":[],"Recipe":[],"Service":[],"SoftwareApplication":[],"WebPage":[]},"graphName":"BlogPosting","isEnabled":true},"graphs":[]},"schema_type":"default","schema_type_options":null,"pillar_content":false,"robots_default":true,"robots_noindex":false,"robots_noarchive":false,"robots_nosnippet":false,"robots_nofollow":false,"robots_noimageindex":false,"robots_noodp":false,"robots_notranslate":false,"robots_max_snippet":"-1","robots_max_videopreview":"-1","robots_max_imagepreview":"large","priority":null,"frequency":"default","local_seo":null,"limit_modified_date":false,"created":"2024-10-04 14:40:55","updated":"2026-03-04 15:42:27","ai":null,"breadcrumb_settings":null,"seo_analyzer_scan_date":null},"aioseo_breadcrumb":"<div class=\"aioseo-breadcrumbs\"><span class=\"aioseo-breadcrumb\">\n\t\t\t<a href=\"https:\/\/blog.citrus-lime.com\/crgh\" title=\"Home\">Home<\/a>\n\t\t<\/span><span class=\"aioseo-breadcrumb-separator\">&raquo;<\/span><span class=\"aioseo-breadcrumb\">\n\t\t\t<a href=\"https:\/\/blog.citrus-lime.com\/crgh\/category\/clothing\/\" title=\"Clothing\">Clothing<\/a>\n\t\t<\/span><span class=\"aioseo-breadcrumb-separator\">&raquo;<\/span><span class=\"aioseo-breadcrumb\">\n\t\t\tHydrostatic Head: Waterproof Tents &amp; Jackets Here is What You Need to Know\n\t\t<\/span><\/div>","aioseo_breadcrumb_json":[{"label":"Home","link":"https:\/\/blog.citrus-lime.com\/crgh"},{"label":"Clothing","link":"https:\/\/blog.citrus-lime.com\/crgh\/category\/clothing\/"},{"label":"Hydrostatic Head: Waterproof Tents &amp; Jackets Here is What You Need to Know","link":"https:\/\/blog.citrus-lime.com\/crgh\/2024\/10\/04\/hydrostatic-head-waterproof-tents-jackets-here-is-what-you-need-to-know\/"}],"_links":{"self":[{"href":"https:\/\/blog.citrus-lime.com\/crgh\/wp-json\/wp\/v2\/posts\/549","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.citrus-lime.com\/crgh\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.citrus-lime.com\/crgh\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.citrus-lime.com\/crgh\/wp-json\/wp\/v2\/users\/157"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.citrus-lime.com\/crgh\/wp-json\/wp\/v2\/comments?post=549"}],"version-history":[{"count":24,"href":"https:\/\/blog.citrus-lime.com\/crgh\/wp-json\/wp\/v2\/posts\/549\/revisions"}],"predecessor-version":[{"id":1178,"href":"https:\/\/blog.citrus-lime.com\/crgh\/wp-json\/wp\/v2\/posts\/549\/revisions\/1178"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/blog.citrus-lime.com\/crgh\/wp-json\/wp\/v2\/media\/556"}],"wp:attachment":[{"href":"https:\/\/blog.citrus-lime.com\/crgh\/wp-json\/wp\/v2\/media?parent=549"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.citrus-lime.com\/crgh\/wp-json\/wp\/v2\/categories?post=549"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.citrus-lime.com\/crgh\/wp-json\/wp\/v2\/tags?post=549"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}