{"id":1167,"date":"2015-01-26T10:37:34","date_gmt":"2015-01-26T10:37:34","guid":{"rendered":"http:\/\/www.tiling-world.com\/?p=1167"},"modified":"2021-09-23T13:25:20","modified_gmt":"2021-09-23T11:25:20","slug":"improve-finish-silicone-joints","status":"publish","type":"post","link":"https:\/\/www.rubi.com\/us\/blog\/improve-finish-silicone-joints\/","title":{"rendered":"How to improve the finish of silicone joints"},"content":{"rendered":"<p><strong>Why are they necessary<\/strong><br \/>\nThey are needed because all tiles expand and contract with temperature and moisture changes. In almost every case the substrate will move differently to the covering material. The larger the tile field, the more it will expand and contract, and be vulnerable to failure. In 95 per cent of today&#8217;s tile installations they will be fixed using the thin-bed method. This means the tile is adhered directly to the substrate with an appropriate adhesive. Movement joints accommodate the differential stresses within each &#8220;field&#8221; of tiling, so they don&#8217;t build up to a level which would cause shearing stresses at the bonded interface, protecting the tiles from cracking, tenting and deboning.<br \/>\n<img decoding=\"async\" class=\"aligncenter size-full wp-image-1168\" src=\"https:\/\/www.rubi.com\/us\/blog\/wp-content\/uploads\/2015\/01\/tools.png\" alt=\"Tools to improve joints finishing\" width=\"889\" height=\"332\" srcset=\"https:\/\/www.rubi.com\/us\/blog\/wp-content\/uploads\/2015\/01\/tools.png 889w, https:\/\/www.rubi.com\/us\/blog\/wp-content\/uploads\/2015\/01\/tools-300x112.png 300w, https:\/\/www.rubi.com\/us\/blog\/wp-content\/uploads\/2015\/01\/tools-768x287.png 768w\" sizes=\"(max-width: 889px) 100vw, 889px\" \/><\/p>\n<ul>\n<li><a href=\"https:\/\/www.rubi.com\/us\/product\/rubiflex-measuring-tapes\" target=\"_blank\" rel=\"noopener\"><span style=\"text-decoration: underline\">Measuring Tapes<\/span><\/a><\/li>\n<li><a href=\"https:\/\/www.rubi.com\/us\/product\/line-marker\" target=\"_blank\" rel=\"noopener\"><span style=\"text-decoration: underline\">Line markers<\/span><\/a><\/li>\n<li><a href=\"https:\/\/www.rubi.com\/us\/sections\/tile-installation-tools\" target=\"_blank\" rel=\"noopener\"><span style=\"text-decoration: underline\">Outliner for joints<\/span><\/a><\/li>\n<li><a href=\"https:\/\/www.rubi.com\/us\/product\/manual-grout-mortar-applicator\" target=\"_blank\" rel=\"noopener\"><span style=\"text-decoration: underline\">Joint aplicators for mortar<\/span><\/a><\/li>\n<li><a href=\"https:\/\/www.rubi.com\/us\/categories\/spatulas\" target=\"_blank\" rel=\"noopener\"><span style=\"text-decoration: underline\">Joint Spatulas<\/span><\/a><\/li>\n<li><a href=\"https:\/\/www.rubi.com\/en\/product\/joint-scraper\" target=\"_blank\" rel=\"noopener\"><span style=\"text-decoration: underline\">Joint Scraper<\/span><\/a><\/li>\n<\/ul>\n<p>Stresses from drying shrinkage, deflection and moisture movement in the substrate, plus thermal and moisture changes affecting the flooring, can cause loss of adhesion, resulting in bulging or cracking of the floor.<br \/>\nIn particular, deflections in suspended floors can induce high compressive stresses in rigid floor tiling, and may be the principal cause of &#8220;hollowness&#8221; in those situations. The shear stress resulting in the substrate and ceramic or stone surface\u00a0moving differently from each other is often too great for the adhesive to hold &#8211; shown in the top picture.<br \/>\nTherefore, stress-relieving joints are an essential part of any tiling installation, and should be incorporated at the design stage.<br \/>\nThere are different widths of pre-formed movement joints, and the correct width and material &#8211; brass, aluminium, stainless steel or PVC &#8211; must be specified to take thermal movement into account.<br \/>\nThe amount of movement that can be absorbed &#8211; and therefore the degree of protection given by the joint &#8211; depends on the size of the profile and the compressible material used. Pre-formed surface joints will usually accommodate movement up to 20% of the movement zone width. For example, one of the larger stress-relieving joints at 15mm wide, with a movement zone of 11mm, will accommodate up to 2.5mm of tile movement.<br \/>\n<img decoding=\"async\" class=\"aligncenter size-full wp-image-1169\" src=\"https:\/\/www.rubi.com\/us\/blog\/wp-content\/uploads\/2015\/01\/plan.png\" alt=\"Planes to improve joints finishing\" width=\"827\" height=\"417\" srcset=\"https:\/\/www.rubi.com\/us\/blog\/wp-content\/uploads\/2015\/01\/plan.png 827w, https:\/\/www.rubi.com\/us\/blog\/wp-content\/uploads\/2015\/01\/plan-300x151.png 300w, https:\/\/www.rubi.com\/us\/blog\/wp-content\/uploads\/2015\/01\/plan-768x387.png 768w\" sizes=\"(max-width: 827px) 100vw, 827px\" \/><br \/>\nHowever, as the majority of tiled installations involve the thin-bed fixing method, cracks in the substrate will readily be transferred to the surface, causing the tiles to crack. Where irregular hairline cracks in the screed or timber board joints are present, it\u2019s not practical or possible to position movement joints over those.\u00a0 In this situation the best way of preventing damage is to incorporate movement joints with an uncoupling system, such as a polyethylene membrane, to separate the covering from the substrate, in order to guarantee the long-lasting integrity of the installation.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Why are they necessary They are needed because all tiles expand and contract with temperature and moisture changes. In almost every case the substrate will move differently to the covering material. The larger the tile field, the more it will expand and contract, and be vulnerable to failure. In 95 per cent of today&#8217;s tile &hellip; <a href=\"https:\/\/www.rubi.com\/us\/blog\/improve-finish-silicone-joints\/\">Continued<\/a><\/p>\n","protected":false},"author":53,"featured_media":1169,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"content-type":"","footnotes":""},"categories":[382,756],"tags":[],"class_list":["post-1167","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-installation","category-tips-tricks"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>How to improve the finish of silicone joints &#8211; Rubi Blog USA<\/title>\n<meta name=\"description\" content=\"The finish of silicone joints is one of the most important steps in the tiling work. 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