{"id":2418,"date":"2026-08-06T13:23:51","date_gmt":"2026-08-06T18:23:51","guid":{"rendered":"https:\/\/www.aquapools.com\/blog\/?p=2418"},"modified":"2026-08-06T13:29:32","modified_gmt":"2026-08-06T18:29:32","slug":"gunite-pools-vs-fiberglass-pools","status":"publish","type":"post","link":"https:\/\/www.aquapools.com\/blog\/gunite-pools-vs-fiberglass-pools\/","title":{"rendered":"Gunite Pools or Fiberglass Pool, What Pool Should I Install? The Hidden Risk in Gunite (Concrete) Pools"},"content":{"rendered":"<h1>Alkali-Silica Reaction (ASR): The Hidden Risk in Concrete Pools and Why More Homeowners Are Choosing Carbon Composite Fiberglass Pools<\/h1>\n<p>When homeowners compare fiberglass and gunite pools, they usually focus on appearance, price, and installation time. An equally important consideration is long-term durability. One issue that has gained attention in the pool industry is\u00a0<strong>Alkali-Silica Reaction (ASR)<\/strong>, a concrete-specific deterioration mechanism that can affect some concrete pool shells.<\/p>\n<h2>What Is ASR?<img data-recalc-dims=\"1\" fetchpriority=\"high\" decoding=\"async\" class=\"alignright size-medium wp-image-2420\" src=\"https:\/\/i0.wp.com\/www.aquapools.com\/blog\/wp-content\/uploads\/2026\/08\/gunite_pool_vs_fiberglass_pools_aquapools_texas.png?resize=300%2C200&#038;ssl=1\" alt=\"gunite pool vs fiberglass pools aquapools texas\" width=\"300\" height=\"200\"  title=\"Gunite Pools or Fiberglass Pool, What Pool Should I Install? The Hidden Risk in Gunite (Concrete) Pools\" srcset=\"https:\/\/i0.wp.com\/www.aquapools.com\/blog\/wp-content\/uploads\/2026\/08\/gunite_pool_vs_fiberglass_pools_aquapools_texas.png?resize=300%2C200&amp;ssl=1 300w, https:\/\/i0.wp.com\/www.aquapools.com\/blog\/wp-content\/uploads\/2026\/08\/gunite_pool_vs_fiberglass_pools_aquapools_texas.png?resize=768%2C512&amp;ssl=1 768w, https:\/\/i0.wp.com\/www.aquapools.com\/blog\/wp-content\/uploads\/2026\/08\/gunite_pool_vs_fiberglass_pools_aquapools_texas.png?w=960&amp;ssl=1 960w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/h2>\n<p>ASR is a chemical reaction that can occur when alkalis in cement react with certain silica-bearing aggregates in the presence of moisture. The reaction forms an expansive gel that absorbs water and can create internal pressure within concrete, leading to cracking and deterioration over time.<\/p>\n<p>For a technical explanation, see the\u00a0<a href=\"https:\/\/www.phta.org\/advocacy\/state-local-advocacy\/alkali-silica-reaction-asr\/?utm_source=aquapoolst&amp;utm_medium=asr_blog_post&amp;utm_campaign=pool_hot_tub_alliance_link_&amp;utm_content=what_to_install\" target=\"_blank\" rel=\"noopener noreferrer\">Pool &amp; Hot Tub Alliance (PHTA) ASR resource<\/a>.<\/p>\n<h2>Why Swimming Pools Can Be Vulnerable<\/h2>\n<ul>\n<li>Constant exposure to water<\/li>\n<li>Potential reactive aggregates in concrete<\/li>\n<li>Internal expansion can lead to map cracking and structural concerns<\/li>\n<\/ul>\n<p>Not every gunite or concrete pool develops ASR. It depends on the concrete materials and conditions. Many concrete pools perform well for decades.<\/p>\n<h2>Central Texas in the News: A Real-World Example<\/h2>\n<h2><img data-recalc-dims=\"1\" decoding=\"async\" class=\"alignright wp-image-2421 \" src=\"https:\/\/i0.wp.com\/www.aquapools.com\/blog\/wp-content\/uploads\/2026\/08\/intrigue-30-exuma-silver-texas-lakeside-showcase-2-e1786040702525-261x300.png?resize=230%2C264&#038;ssl=1\" alt=\"Gunite Pools vs Fiberglass Pools in Texas\" width=\"230\" height=\"264\"  title=\"Gunite Pools or Fiberglass Pool, What Pool Should I Install? The Hidden Risk in Gunite (Concrete) Pools\" srcset=\"https:\/\/i0.wp.com\/www.aquapools.com\/blog\/wp-content\/uploads\/2026\/08\/intrigue-30-exuma-silver-texas-lakeside-showcase-2-e1786040702525.png?resize=261%2C300&amp;ssl=1 261w, https:\/\/i0.wp.com\/www.aquapools.com\/blog\/wp-content\/uploads\/2026\/08\/intrigue-30-exuma-silver-texas-lakeside-showcase-2-e1786040702525.png?resize=892%2C1024&amp;ssl=1 892w, https:\/\/i0.wp.com\/www.aquapools.com\/blog\/wp-content\/uploads\/2026\/08\/intrigue-30-exuma-silver-texas-lakeside-showcase-2-e1786040702525.png?resize=768%2C882&amp;ssl=1 768w, https:\/\/i0.wp.com\/www.aquapools.com\/blog\/wp-content\/uploads\/2026\/08\/intrigue-30-exuma-silver-texas-lakeside-showcase-2-e1786040702525.png?w=927&amp;ssl=1 927w\" sizes=\"(max-width: 230px) 100vw, 230px\" \/><\/h2>\n<p> ASR is not just a laboratory topic. In Central Texas, the issue has become significant enough to receive statewide media attention.<\/p>\n<p>In its investigation,\u00a0<a href=\"https:\/\/www.kxan.com\/investigations\/concrete-cancer-in-central-texas-pools-may-cause-billions-in-damage-experts-say\/\" target=\"_blank\" rel=\"noopener noreferrer\">KXAN News reported on what many homeowners call &#8220;concrete cancer&#8221;<\/a>. The investigation cited industry experts estimating that nearly 30,000 pools in Central Texas could potentially be affected, with possible damages reaching billions of dollars.<\/p>\n<p>Those figures are estimates reported by KXAN and should not be interpreted as confirmed diagnoses. However, they demonstrate how expensive concrete deterioration can become when it occurs.<\/p>\n<p>The PHTA has also identified the Austin area as a notable ASR outbreak region and notes that symptoms may not become visible for years after construction.<\/p>\n<h2>Why Carbon Composite Fiberglass Pools Are Different<\/h2>\n<p>Carbon Composite Fiberglass Pool shells contain no Portland cement and no concrete aggregate. Because the materials required for ASR are absent, this specific concrete reaction cannot occur within the fiberglass shell.<\/p>\n<h2>Additional Benefits<\/h2>\n<ul>\n<li>Faster installation<\/li>\n<li>Smooth, nonporous surface<\/li>\n<li>Generally lower weekly maintenance<\/li>\n<li>More stable water chemistry<\/li>\n<li>No plaster resurfacing<\/li>\n<li>Lower long-term cost of ownership for many homeowners<\/li>\n<\/ul>\n<h2>Fiberglass vs. Gunite<\/h2>\n<p>Choosing a swimming pool is about more than the initial price. It is also about durability, maintenance, and lifetime ownership costs. While many gunite pools provide years of reliable service, ASR highlights why understanding construction materials matters. Carbon Composite Fiberglass Pools eliminate the concrete shell, reducing maintenance demands and avoiding concrete-specific deterioration mechanisms such as ASR.<\/p>\n<div style=\"overflow-x: auto; margin: 24px 0;\">\n<table style=\"width: 100%; border-collapse: collapse; border: 1px solid #333;\">\n<thead>\n<tr>\n<th style=\"border: 1px solid #333; padding: 12px; text-align: left;\">Pool Features<\/th>\n<th style=\"border: 1px solid #333; padding: 12px; text-align: left;\">Carbon Composite Fiberglass Pools<\/th>\n<th style=\"border: 1px solid #333; padding: 12px; text-align: left;\">Gunite or Concrete Pools<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"border: 1px solid #333; padding: 12px;\">Typical Installation Timeline<\/td>\n<td style=\"border: 1px solid #333; padding: 12px;\">Often installed in 3-6 weeks<\/td>\n<td style=\"border: 1px solid #333; padding: 12px;\">Often takes 3-5 months to install<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #333; padding: 12px;\">Interior Surface<\/td>\n<td style=\"border: 1px solid #333; padding: 12px;\">Smooth and nonporous<\/td>\n<td style=\"border: 1px solid #333; padding: 12px;\">Porous plaster or cement-based finish<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #333; padding: 12px;\">Weekly Maintenance<\/td>\n<td style=\"border: 1px solid #333; padding: 12px;\">Generally lower<\/td>\n<td style=\"border: 1px solid #333; padding: 12px;\">Generally higher<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #333; padding: 12px;\">Chemical Demand<\/td>\n<td style=\"border: 1px solid #333; padding: 12px;\">Often lower and more stable<\/td>\n<td style=\"border: 1px solid #333; padding: 12px;\">May require more frequent adjustment<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #333; padding: 12px;\">Algae Resistance<\/td>\n<td style=\"border: 1px solid #333; padding: 12px;\">Strong due to the smooth surface<\/td>\n<td style=\"border: 1px solid #333; padding: 12px;\">Algae can attach more easily to porous surfaces<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #333; padding: 12px;\">Plaster Resurfacing<\/td>\n<td style=\"border: 1px solid #333; padding: 12px;\">Not required<\/td>\n<td style=\"border: 1px solid #333; padding: 12px;\">May be required over time<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #333; padding: 12px;\">Susceptible to ASR<\/td>\n<td style=\"border: 1px solid #333; padding: 12px;\">No, not within the fiberglass shell<\/td>\n<td style=\"border: 1px solid #333; padding: 12px;\">Possible when the required conditions exist<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #333; padding: 12px;\">Design Flexibility<\/td>\n<td style=\"border: 1px solid #333; padding: 12px;\">Customize with Rectangular\/Freeform Pool &amp; Spa Shells<\/td>\n<td style=\"border: 1px solid #333; padding: 12px;\">Highly customizable<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #333; padding: 12px;\">Lifetime Warranties<\/td>\n<td style=\"border: 1px solid #333; padding: 12px;\">Lifetime Warranties on all pools and spas<\/td>\n<td style=\"border: 1px solid #333; padding: 12px;\">No warranties from the pool cracking or ASR<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<h2>Ready to Design Your Dream Backyard?<\/h2>\n<p>Choosing the right swimming pool is a long-term investment, and every backyard is unique. That&#8217;s why AquaPools takes a personalized approach to every project.<\/p>\n<h2><img data-recalc-dims=\"1\" decoding=\"async\" class=\"alignright wp-image-2422 size-medium\" src=\"https:\/\/i0.wp.com\/www.aquapools.com\/blog\/wp-content\/uploads\/2026\/08\/AquaPools-Fiberglass-Pools-e1786040765317-278x300.jpg?resize=278%2C300&#038;ssl=1\" alt=\"Fiberglass Over Gunite Pools\" width=\"278\" height=\"300\"  title=\"Gunite Pools or Fiberglass Pool, What Pool Should I Install? The Hidden Risk in Gunite (Concrete) Pools\" srcset=\"https:\/\/i0.wp.com\/www.aquapools.com\/blog\/wp-content\/uploads\/2026\/08\/AquaPools-Fiberglass-Pools-e1786040765317.jpg?resize=278%2C300&amp;ssl=1 278w, https:\/\/i0.wp.com\/www.aquapools.com\/blog\/wp-content\/uploads\/2026\/08\/AquaPools-Fiberglass-Pools-e1786040765317.jpg?resize=949%2C1024&amp;ssl=1 949w, https:\/\/i0.wp.com\/www.aquapools.com\/blog\/wp-content\/uploads\/2026\/08\/AquaPools-Fiberglass-Pools-e1786040765317.jpg?resize=768%2C829&amp;ssl=1 768w, https:\/\/i0.wp.com\/www.aquapools.com\/blog\/wp-content\/uploads\/2026\/08\/AquaPools-Fiberglass-Pools-e1786040765317.jpg?resize=1423%2C1536&amp;ssl=1 1423w, https:\/\/i0.wp.com\/www.aquapools.com\/blog\/wp-content\/uploads\/2026\/08\/AquaPools-Fiberglass-Pools-e1786040765317.jpg?w=1587&amp;ssl=1 1587w\" sizes=\"(max-width: 278px) 100vw, 278px\" \/><\/h2>\n<p>When you schedule a <strong>free Backyard Design Consultation<\/strong>, one of our experienced Backyard Designers will visit your home to evaluate your property, discuss your family&#8217;s lifestyle, and answer all of your questions about Carbon Composite Fiberglass Pools, installation, financing, maintenance, and available features.<\/p>\n<p><strong>During your consultation, we&#8217;ll:<\/strong><\/p>\n<ul>\n<li>Measure your backyard and evaluate the available space.<\/li>\n<li>Discuss your vision, budget, and lifestyle goals.<\/li>\n<li>Recommend the best Carbon Composite Fiberglass Pool models for your property.<\/li>\n<li>Create a customized pool design tailored to your backyard.<\/li>\n<li>Review optional features such as tanning ledges, spas, water features, decking, lighting, and automation.<\/li>\n<li>Provide a personalized, no-obligation pool quote based on your custom design.<\/li>\n<\/ul>\n<p>Whether you&#8217;re just beginning your research or you&#8217;re ready to transform your backyard into your family&#8217;s favorite destination, our team is here to guide you through every step of the process.<\/p>\n<p><strong>Have questions about fiberglass versus gunite pools?<\/strong> We&#8217;d be happy to explain the differences, discuss long-term maintenance costs, review installation timelines, and help you determine which pool is the best fit for your home.<\/p>\n<h2>Sources<\/h2>\n<ul>\n<li><a href=\"https:\/\/www.phta.org\/advocacy\/state-local-advocacy\/alkali-silica-reaction-asr\/\">Pool &amp; Hot Tub Alliance \u2013 Alkali-Silica Reaction<\/a><\/li>\n<li><a href=\"https:\/\/www.kxan.com\/investigations\/concrete-cancer-in-central-texas-pools-may-cause-billions-in-damage-experts-say\/\">KXAN \u2013 Concrete Cancer in Central Texas Pools<\/a><\/li>\n<\/ul>\n<p><strong>At AquaPools, our mission is simple: to help homeowners spend less time maintaining their pool and more time making memories together.<\/strong><\/p>\n<div style=\"background: #f5f9fc; border: 2px solid #0d6efd; border-radius: 8px; padding: 24px; margin: 30px 0; text-align: center;\">\n<h3 style=\"margin-top: 0;\">Schedule Your FREE Backyard Design Consultation<\/h3>\n<p>Discover how a Carbon Composite Fiberglass Pool can transform your backyard with lasting beauty, lower maintenance, and years of family enjoyment.<\/p>\n<p><a style=\"display: inline-block; background: #0d6efd; color: #ffffff; text-decoration: none; padding: 14px 28px; border-radius: 6px; font-weight: bold;\" href=\"https:\/\/www.aquapools.com\/free-pool-quote\/?utm_source=aquapoolst&amp;utm_medium=asr_blog_post&amp;utm_campaign=gunitevsfiberglasspools&amp;utm_content=pool_quote_button\"> Request Your Free Pool Design Consultation <\/a><\/p>\n<p style=\"margin-bottom: 0;\"><strong>No pressure. No obligation. Just expert advice and a customized pool design created specifically for your backyard.<\/strong><\/p>\n<\/div>\n<p>&nbsp;<\/p>\n<!-- AddThis Advanced Settings generic via filter on the_content --><!-- AddThis Share Buttons generic via filter on the_content -->","protected":false},"excerpt":{"rendered":"<p>Alkali-Silica Reaction (ASR): The Hidden Risk in Concrete Pools and Why More Homeowners Are Choosing Carbon Composite Fiberglass Pools When [&hellip;]<!-- AddThis Advanced Settings generic via filter on get_the_excerpt --><!-- AddThis Share Buttons generic via filter on get_the_excerpt --><\/p>\n","protected":false},"author":6,"featured_media":2419,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_post_was_ever_published":false},"categories":[248,256,306,4],"tags":[220,247],"class_list":["post-2418","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-fiberglass-vs-gunite-pools","category-concrete-cancer-asr","category-fiberglass-pool-installer","category-fiberglass-swimming-pools","tag-fiberglass-pools-compared-to-gunite-pools","tag-fiberglass-pools-vs-gunite"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Gunite Pools or Fiberglass Pool, What Pool Should I Install? The Hidden Risk in Gunite (Concrete) Pools - AquaPools Blog Concrete Cancer (ASR)<\/title>\n<meta name=\"description\" content=\"Learn how Alkali-Silica Reaction (ASR) has affected concrete\/gunite pools in Texas and why more homeowners are choosing Fiberglass Pools.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.aquapools.com\/blog\/gunite-pools-vs-fiberglass-pools\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Gunite Pools or Fiberglass Pool, What Pool Should I Install? 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The Hidden Risk in Gunite (Concrete) Pools - AquaPools Blog Concrete Cancer (ASR)","description":"Learn how Alkali-Silica Reaction (ASR) has affected concrete\/gunite pools in Texas and why more homeowners are choosing Fiberglass Pools.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.aquapools.com\/blog\/gunite-pools-vs-fiberglass-pools\/","og_locale":"en_US","og_type":"article","og_title":"Gunite Pools or Fiberglass Pool, What Pool Should I Install? 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