{"id":8863,"date":"2024-05-06T13:12:02","date_gmt":"2024-05-06T05:12:02","guid":{"rendered":"https:\/\/www.dahsin.com.tw\/?p=8292"},"modified":"2024-08-19T18:48:14","modified_gmt":"2024-08-19T10:48:14","slug":"100qa14","status":"publish","type":"post","link":"https:\/\/www.daisin.com.tw\/en\/100qa14\/","title":{"rendered":"(One Hundred Questions on Waterproofing) #14 The roof has cracks that leak water; I want to apply a liquid waterproofing system. Since liquid waterproofing has excellent elasticity, why do I have to first treat these cracks? What are the treatment methods?"},"content":{"rendered":"<p class=\"wp-block-paragraph\">Answer: [1] Because PU has natural flowability before curing, if the cracks are not repaired first, they will seep into the structure along the cracks. After the construction is completed, when the PU hardens, the thickness of these cracks will be insufficient (as can be seen with the naked eye, some slight indentations are noticeable). This is because insufficient thickness affects the waterproof lifespan. After a period of time, if the structure sags due to conditions such as earthquakes, the PU may crack along the cracks, causing water leakage.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">[2] The cracks in general structures often have the characteristic of \"repeated cracking\"; if not treated first, even the highly elastic PU cannot withstand the instantaneous stress caused by repeated cracking.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">[3] The construction methods are divided into:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong><\/strong><strong>Sealing method: Applicable to shear-induced cracks in general roofs.<\/strong><strong><\/strong><\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" src=\"https:\/\/www.dahsin.com.tw\/wp-content\/uploads\/2024\/05\/C.png\" alt=\"\" class=\"wp-image-8295\"\/><\/figure>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Insulation method: Applicable to large span beams, columns, or roofs that have already shown significant deformation.<\/strong>2mm<strong>When the transverse shear crack occurs as described above<\/strong><\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" src=\"https:\/\/www.dahsin.com.tw\/wp-content\/uploads\/2024\/05\/D.png\" alt=\"\" class=\"wp-image-8296\"\/><\/figure>","protected":false},"excerpt":{"rendered":"<p>\u7b54\uff1a\u30101\u3011\u56e0\u70baPU\u5728\u786c\u5316\u524d\uff0c\u5177\u6709\u81ea\u7136\u6d41\u5c55\u6027\uff0c\u6240\u4ee5\u5982\u679c\u4e0d\u5148\u5c07\u88c2\u7e2b\u4fee\u88dc\uff0c\u6703\u6cbf\u8457\u88c2\u7e2b\u6ef2\u5165\u7d50\u69cb\u88cf\u9762\uff0c\u7b49\u65bd\u5de5\u5b8c\u7562\uff0cPU\u786c [&hellip;]<\/p>\n","protected":false},"author":4,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[24],"tags":[70],"class_list":["post-8863","post","type-post","status-publish","format-standard","hentry","category-100qa","tag-qa"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.daisin.com.tw\/en\/wp-json\/wp\/v2\/posts\/8863","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.daisin.com.tw\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.daisin.com.tw\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.daisin.com.tw\/en\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/www.daisin.com.tw\/en\/wp-json\/wp\/v2\/comments?post=8863"}],"version-history":[{"count":0,"href":"https:\/\/www.daisin.com.tw\/en\/wp-json\/wp\/v2\/posts\/8863\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.daisin.com.tw\/en\/wp-json\/wp\/v2\/media?parent=8863"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.daisin.com.tw\/en\/wp-json\/wp\/v2\/categories?post=8863"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.daisin.com.tw\/en\/wp-json\/wp\/v2\/tags?post=8863"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}