{"id":6008,"date":"2020-01-15T13:42:12","date_gmt":"2020-01-15T13:42:12","guid":{"rendered":"https:\/\/www.bgs.ac.uk\/?post_type=dataset&#038;p=6008"},"modified":"2020-12-08T15:26:58","modified_gmt":"2020-12-08T15:26:58","slug":"shrink-swell-property-hazard-information","status":"publish","type":"dataset","link":"https:\/\/www.bgs.ac.uk\/datasets\/bgs-geosure-shrink-swell\/shrink-swell-property-hazard-information\/","title":{"rendered":"Shrink\u2013swell: property hazard information"},"content":{"rendered":"\t\t\t<section class=\"hero-section hero-section-with-social\">\n\t\t\t\t\t\t\t\t<div class=\"hero-info-wrap\">\n\t\t\t\t\t<div class=\"container\">\n\t\t\t\t\t\t<div class=\"row\">\n\t\t\t\t\t\t\t<div class=\"col-12\">\n\t\t\t\t\t\t\t\t<div class=\"hero-info\">\n\t\t\t\t\t\t\t\t\t<h1>Shrink\u2013swell: property hazard information<\/h1>\n\t\t\t\t\t\t\t\t\t<p>BGS Datasets &mdash; BGS GeoSure<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\n\t\t\t<div class=\"social-wrap social-wrap-inline-them\">\n\t\t\t\t<div class=\"sea-background-f\">\n\t\t\t\t\t<span>Share this article<\/span><a target=\"_blank\"  href=\"https:\/\/www.facebook.com\/sharer\/sharer.php?u=https:\/\/www.bgs.ac.uk\/datasets\/bgs-geosure-shrink-swell\/shrink-swell-property-hazard-information\/\"><span class=\"icon-facebook\"><span class=\"hidden\">Facebook<\/span><\/span><\/a><a target=\"_blank\"  href=\"https:\/\/twitter.com\/intent\/tweet?text=Shrink\u2013swell:%20property%20hazard%20information&#038;url=https:\/\/www.bgs.ac.uk\/datasets\/bgs-geosure-shrink-swell\/shrink-swell-property-hazard-information\/\"><span class=\"icon-twitter\"><span class=\"hidden\">Twitter<\/span><\/span><\/a><a   onclick=\"javascript:void( (function() {var e=document.createElement('script' );e.setAttribute('type','text\/javascript' );e.setAttribute('charset','UTF-8' );e.setAttribute('src','\/\/assets.pinterest.com\/js\/pinmarklet.js?r='+Math.random()*99999999);document.body.appendChild(e)})());\"  href=\"javascript:void(0);\"><span class=\"icon-pinterest\"><span class=\"hidden\">Pinterest<\/span><\/span><\/a><a target=\"_blank\"  href=\"https:\/\/wa.me?text=https:\/\/www.bgs.ac.uk\/datasets\/bgs-geosure-shrink-swell\/shrink-swell-property-hazard-information\/\"><span class=\"icon-whatsapp\"><span class=\"hidden\">WhatsApp<\/span><\/span><\/a><a   href=\"mailto:?subject=Shrink\u2013swell:%20property%20hazard%20information&#038;body=If%20active%20clay%20shrinkage\/swelling%20appears%20to%20be%20affecting%20your%20property,%20inform%20your%20insurance%20company,%20mortgage%20lender%20or%20landlord.%20(https:\/\/www.bgs.ac.uk\/datasets\/bgs-geosure-shrink-swell\/shrink-swell-property-hazard-information\/)\"><span class=\"icon-mail\"><span class=\"hidden\">Email<\/span><\/span><\/a><a href=\"#\" data-copy=\"https:\/\/www.bgs.ac.uk\/datasets\/bgs-geosure-shrink-swell\/shrink-swell-property-hazard-information\/\" class=\"copy-url-on-click\"><span class=\"icon-link\"><span class=\"hidden\">Copy Link<\/span><\/span><\/a><\/div><\/div>\t\t\t\t\t\t\t<\/section>\n\t\t\t\n\n\n<section class=\"wp-block-bgs-blocks-content-container content-section\"><div class=\"container\"><div class=\"row\"><div class=\"col-12\">\n<p>If active clay shrinkage or swelling appears to be affecting your property, inform your insurance company, mortgage lender or landlord. Get specialist advice from a suitably qualified expert such as a structural surveyor, geotechnical engineer or chartered engineering geologist.<\/p>\n\n\n\n<p>If active clay shrinkage or swelling is not affecting your property but the area has shrink\u2013swell clay potential for, this should be taken into account before starting new buildings or changes in land use. <\/p>\n\n\n\n<ul><li>Take specialist advice before starting major building work.<\/li><li>Consider the effect of laying impermeable drives, paths or hardstanding on the rainfall reaching the soil below and changing its moisture content.<\/li><li>Seek expert advice before planting trees near to a house. The safe planting distance will depend on the tree species, the type of foundation and soil composition.                 <\/li><li>Ensure foundations of new constructions or extensions are designed for the shrinkable clay soil conditions that are present.<\/li><li>Do not plant potentially large trees next to a house.<\/li><li>Do not remove mature trees that pre-date the construction of the house before taking advice. Tree management by crown reduction or thinning may be better than removal because it will maintain a stable soil moisture profile.<\/li><\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Hazard ratings and advice<\/h2>\n\n\n\t\t\t<div id=\"wysiwyg-485-block_5e2ec7f94d60a\" class=\"  \" >\n\t\t\t<div class=\"col-12 responsive-table\"><table>\n<thead>\n<tr>\n<th data-name=\"Hazard rating\">Hazard rating<\/th>\n<th data-name=\"Advice for public\">Advice for public<\/th>\n<th data-name=\"Advice for specialist\">Advice for specialist<\/th>\n<\/tr>\n<\/thead>\n<tbody><tr>\n<td data-before=\"Hazard rating\">A \u2014 ground conditions predominantly non-plastic.<\/td><td data-before=\"Advice for public\">No actions required to avoid problems due to shrink\u2013swell clays.<\/td><td data-before=\"Advice for specialist\">No special ground investigation required or increased construction costs or increased financial risk due to potential problems with shrink\u2013swell clays.<\/tr><tr>\n<td data-before=\"Hazard rating\">B \u2014 ground conditions predominantly low plasticity.<\/td><td data-before=\"Advice for public\">No actions required to avoid problems due to shrink\u2013swell clays<\/td><td data-before=\"Advice for specialist\">No special ground investigation required or increased construction costs or increased financial risk due to potential problems with shrink\u2013swell clays.<\/tr><tr>\n<td data-before=\"Hazard rating\">C \u2014 ground conditions predominantly medium plasticity.<\/td><td data-before=\"Advice for public\">Do not plant trees with high soil moisture demands near to buildings.<\/td><td data-before=\"Advice for specialist\">New build \u2014 test for plasticity index is recommended. Possible increase in construction cost to remove possibility of potential shrink\u2013swell problems.<\/p>\n<p>Existing property <span style=\"font-family: inherit; font-size: inherit;\">\u2014 possible increase in insurance risk in droughts or where high moisture demand vegetation is present due to shrink\u2013swell clay problems if foundations are not suitable.<\/span><\/tr><tr>\n<td data-before=\"Hazard rating\">D \u2014 ground conditions predominantly high plasticity.<\/td><td data-before=\"Advice for public\">Do not plant or remove trees or shrubs near to buildings without expert advice about their effect and management.<\/td><td data-before=\"Advice for specialist\">New build \u2014 test for plasticity index is necessary. Probable increase in construction cost to remove possibility of potential shrink\u2013swell problems.<\/p>\n<p>Existing property<strong style=\"font-family: inherit; font-size: inherit;\"> \u2014<\/strong><span style=\"font-family: inherit; font-size: inherit;\"> probable increase in insurance risk in droughts or where high moisture demand vegetation is present due to shrink\u2013swell clay problems if foundations are not suitable.<\/span><\/tr><tr>\n<td data-before=\"Hazard rating\">E \u2014 ground conditions predominantly very high plasticity.<\/td><td data-before=\"Advice for public\">Do not plant or remove trees or shrubs near to buildings without expert advice about their effect and management.<\/td><td data-before=\"Advice for specialist\">New build \u2014 test for plasticity index is essential. Definite increase in construction cost to remove possibility of potential shrink\u2013swell problems.<\/p>\n<p>Existing property<span style=\"font-family: inherit; font-size: inherit;\"> \u2014 significant increase in insurance risk in droughts or where high moisture demand vegetation is present due to shrink\u2013swell clay problems if foundations are not suitable.<\/span><\/tbody>\n<\/table><\/div>\n<p>&nbsp;<\/p>\n\t\t\t<\/div>\n\t\t\t<\/div><\/div><\/div><\/section>\n\n\n\n\n\t\t\t\t\t<section   id=\"latest-content-4635-block_5e6f730e24ad2\" class=\"grid-section  primary-background   \" >\n\t\t\t\t\t\t<div class=\"container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"row header-of-section\">\n\t\t\t\t\t\t\t\t<div class=\"col-12\">\n\t\t\t\t\t\t\t\t\t<h2>You may also be interested in<\/h2>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"row grid-wrap\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"col-lg-6 col-12\">\n\t<div class=\"cards cards-orizontal-sm  cards-find-more  cards-bordered\">\n\t\t\t\t<a href=\"https:\/\/www.bgs.ac.uk\/geological-data\/datasets\/\" class=\"media-wrap\">\n\t\t\t<img decoding=\"async\" src=\"https:\/\/www.bgs.ac.uk\/wp-content\/uploads\/2020\/01\/feature_250kSample-150x150.jpg\" class=\"lazy-blur wp-post-image\" alt=\"BGS Geology 250k sample\" data-src=\"https:\/\/www.bgs.ac.uk\/wp-content\/uploads\/2020\/01\/feature_250kSample.jpg\" \/>\t\t\t\t\t<\/a>\n\t\t\t\t<div class=\"info-wrap\">\n\t\t\t<div class=\"info\">\n\t\t\t\t<h4><a href=\"https:\/\/www.bgs.ac.uk\/geological-data\/datasets\/\">Datasets<\/a><\/h4>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<p>We have a wide range of  licensed geoscience data. The datasets range from the geological data family (BGS Geology) to offshore data, ground stability datasets and 3D models.<\/p>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t<a href=\"https:\/\/www.bgs.ac.uk\/geological-data\/datasets\/\">Show more<\/a>\n\t\t<\/div>\n\t<\/div>\n<\/div>\n<div class=\"col-lg-6 col-12\">\n\t<div class=\"cards cards-orizontal-sm  cards-find-more  cards-bordered\">\n\t\t\t\t<a href=\"https:\/\/www.bgs.ac.uk\/datasets\/geosure\/\" class=\"media-wrap\">\n\t\t\t<img decoding=\"async\" src=\"https:\/\/www.bgs.ac.uk\/wp-content\/uploads\/2020\/02\/feature_geosure_sample-150x150.jpg\" class=\"lazy-blur wp-post-image\" alt=\"Geosure sample\" data-src=\"https:\/\/www.bgs.ac.uk\/wp-content\/uploads\/2020\/02\/feature_geosure_sample.jpg\" \/>\t\t\t\t\t<\/a>\n\t\t\t\t<div class=\"info-wrap\">\n\t\t\t<div class=\"info\">\n\t\t\t\t<h4><a href=\"https:\/\/www.bgs.ac.uk\/datasets\/geosure\/\">BGS GeoSure<\/a><\/h4>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<p>The BGS GeoSure datasets identify areas of potential hazard and, therefore, potential natural ground movement, in Great Britain.<\/p>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t<a href=\"https:\/\/www.bgs.ac.uk\/datasets\/geosure\/\">Show more<\/a>\n\t\t<\/div>\n\t<\/div>\n<\/div>\n<div class=\"col-lg-6 col-12\">\n\t<div class=\"cards cards-orizontal-sm  cards-find-more  cards-bordered\">\n\t\t\t\t<a href=\"https:\/\/www.bgs.ac.uk\/datasets\/bgs-geosure-shrink-swell\/\" class=\"media-wrap\">\n\t\t\t<img decoding=\"async\" src=\"https:\/\/www.bgs.ac.uk\/wp-content\/uploads\/2020\/12\/lambeth_crack-150x150.jpg\" class=\"lazy-blur wp-post-image\" alt=\"Cracks in dried-out shrink-swell clay\" data-src=\"https:\/\/www.bgs.ac.uk\/wp-content\/uploads\/2020\/12\/lambeth_crack.jpg\" \/>\t\t\t\t\t<\/a>\n\t\t\t\t<div class=\"info-wrap\">\n\t\t\t<div class=\"info\">\n\t\t\t\t<h4><a href=\"https:\/\/www.bgs.ac.uk\/datasets\/bgs-geosure-shrink-swell\/\">BGS GeoSure: shrink\u2013swell<\/a><\/h4>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<p>Many soils contain clay minerals that absorb water when wet (making them swell), and lose water as they dry (making them shrink). Many of us see this in our gardens when the ground becomes cracked during the summer, yet becomes &#8216;heavy&#8217; in the winter.<\/p>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t<a href=\"https:\/\/www.bgs.ac.uk\/datasets\/bgs-geosure-shrink-swell\/\">Show more<\/a>\n\t\t<\/div>\n\t<\/div>\n<\/div>\n<div class=\"col-lg-6 col-12\">\n\t<div class=\"cards cards-orizontal-sm  cards-find-more  cards-bordered\">\n\t\t\t\t<a href=\"https:\/\/www.bgs.ac.uk\/datasets\/bgs-geosure-shrink-swell-subsurface\/\" class=\"media-wrap\">\n\t\t\t<img decoding=\"async\" src=\"https:\/\/www.bgs.ac.uk\/wp-content\/uploads\/2020\/02\/feature_geosure_subsurface-150x150.jpg\" class=\"lazy-blur wp-post-image\" alt=\"GeoSure subsurface\" data-src=\"https:\/\/www.bgs.ac.uk\/wp-content\/uploads\/2020\/02\/feature_geosure_subsurface.jpg\" \/>\t\t\t\t\t<\/a>\n\t\t\t\t<div class=\"info-wrap\">\n\t\t\t<div class=\"info\">\n\t\t\t\t<h4><a href=\"https:\/\/www.bgs.ac.uk\/datasets\/bgs-geosure-shrink-swell-subsurface\/\">BGS GeoSure: shrink&ndash;swell subsurface<\/a><\/h4>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<p>This is a single data layer that identifies areas of potential shrink\u2013swell hazard that are underneath another solid formation and therefore hidden from the surface.<\/p>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t<a href=\"https:\/\/www.bgs.ac.uk\/datasets\/bgs-geosure-shrink-swell-subsurface\/\">Show more<\/a>\n\t\t<\/div>\n\t<\/div>\n<\/div>\n<div class=\"col-lg-6 col-12\">\n\t<div class=\"cards cards-orizontal-sm  cards-find-more  cards-bordered\">\n\t\t\t\t<a href=\"https:\/\/www.bgs.ac.uk\/datasets\/bgs-geosure-shrink-swell-3d-for-london-and-thames-valley\/\" class=\"media-wrap\">\n\t\t\t<img decoding=\"async\" src=\"https:\/\/www.bgs.ac.uk\/wp-content\/uploads\/2020\/02\/feature_GeoSure_shrinkswell_london-150x150.jpg\" class=\"lazy-blur wp-post-image\" alt=\"GeoSure shrink-swell for London\" data-src=\"https:\/\/www.bgs.ac.uk\/wp-content\/uploads\/2020\/02\/feature_GeoSure_shrinkswell_london.jpg\" \/>\t\t\t\t\t<\/a>\n\t\t\t\t<div class=\"info-wrap\">\n\t\t\t<div class=\"info\">\n\t\t\t\t<h4><a href=\"https:\/\/www.bgs.ac.uk\/datasets\/bgs-geosure-shrink-swell-3d-for-london-and-thames-valley\/\">BGS GeoSure: shrink&ndash;swell 3D for London and Thames Valley<\/a><\/h4>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<p>The shrink\u2013swell 3D data is a regional hazard susceptibility map that identifies areas of potential shrink\u2013swell hazard in 3D at intervals down to 20 m in the London and Thames Valley area.<\/p>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t<a href=\"https:\/\/www.bgs.ac.uk\/datasets\/bgs-geosure-shrink-swell-3d-for-london-and-thames-valley\/\">Show more<\/a>\n\t\t<\/div>\n\t<\/div>\n<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"row\">\n\t\t\t\t\t\t\t\t<div class=\"col-12\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/section>\n\t\t\t\t","protected":false},"excerpt":{"rendered":"<p>If active clay shrinkage\/swelling appears to be affecting your property, inform your insurance company, mortgage lender or landlord.<\/p>\n","protected":false},"featured_media":63558,"parent":5161,"menu_order":0,"template":"","meta":{"_acf_changed":false,"_relevanssi_hide_post":"","_relevanssi_hide_content":"","_relevanssi_pin_for_all":"","_relevanssi_pin_keywords":"","_relevanssi_unpin_keywords":"","_relevanssi_related_keywords":"","_relevanssi_related_include_ids":"","_relevanssi_related_exclude_ids":"","_relevanssi_related_no_append":"","_relevanssi_related_not_related":"","_relevanssi_related_posts":"37491,16687,32954,37410,8334,7260","_relevanssi_noindex_reason":"","footnotes":""},"tags":[],"region":[8,116],"topic":[26,25],"purpose":[34,44],"area":[16],"challenge":[],"challenge_topic":[],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v22.5 - 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