{"id":3543,"date":"2016-11-01T06:42:04","date_gmt":"2016-11-01T11:42:04","guid":{"rendered":"http:\/\/homeadditionplus.com\/dev\/?page_id=3543"},"modified":"2017-05-19T18:09:06","modified_gmt":"2017-05-19T23:09:06","slug":"why-is-floor-grout-cracking-tile-loosening","status":"publish","type":"page","link":"https:\/\/homeadditionplus.com\/dev\/tiling-floors-walls\/why-is-floor-grout-cracking-tile-loosening\/","title":{"rendered":"Why is Floor Grout Cracking and Tiles Loosening?"},"content":{"rendered":"<h4><span style=\"color: #008000;\"><strong>Subfloor Deflection Needs to be Nearly Non Existent When Installing a Ceramic Tile Floor<\/strong><\/span><\/h4>\n<p>By Mark J. Donovan<br \/>\n<script type=\"text\/javascript\"><!-- google_ad_client = \"pub-3988490936633155\"; \/* Homepage_Home_Improvement_468x15_ATF, created 8\/13\/10 *\/ google_ad_slot = \"6539705898\"; google_ad_width = 468; google_ad_height = 15; \/\/-->\n<\/script><br \/>\n<script type=\"text\/javascript\" src=\"http:\/\/pagead2.googlesyndication.com\/pagead\/show_ads.js\">\n<\/script><\/p>\n<div class=\"KonaBody\">\n<table style=\"width: 100%;\">\n<tbody>\n<tr>\n<td width=\"50%\">\n<p align=\"center\"><script async src=\"\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js\"><\/script><br \/>\n<!-- New_300x250_051317 --><br \/>\n<ins class=\"adsbygoogle\"\n     style=\"display:inline-block;width:300px;height:250px\"\n     data-ad-client=\"ca-pub-3988490936633155\"\n     data-ad-slot=\"4202793463\"><\/ins><br \/>\n<script>\n(adsbygoogle = window.adsbygoogle || []).push({});\n<\/script>\n<\/p>\n<\/td>\n<td style=\"text-align: left;\" width=\"47%\"><strong>Question:<\/strong> Mark, We had a ceramic tile kitchen floor installed less than a year ago, and now the grout is cracking and some of the tiles are loose. When we had the kitchen remodeled the contractor gutted the kitchen down to the bare floor joists and sistered them with additional lumber to make them level. He then laid down new plywood onto the floor joists. Next he installed Hardibacker cement board on top of the plywood, and finally he installed a layer of mortar on top of the Hardibacker cement board. Any suggestions on how to remedy this problem and why it&#8217;s happening will be most appreciated. Thanks!<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><strong>Answer:<\/strong> D. G. If the grout is cracking and tiles are loosening up then the subfloor is not rigid enough. Subfloor deflection needs to be nearly non-existent in a ceramic floor tile project.<\/p>\n<p>Though the contractor sistered additional lumber to the floor joists I&#8217;d be curious to know how large the floor joists and sistered lumber pieces were. You said he sistered lumber to the old floor joists to level up the floor. However, he should have also used properly sized lumber to stiffen up the floor.<\/p>\n<table style=\"width: 100%;\">\n<tbody>\n<tr>\n<td style=\"text-align: left;\" width=\"50%\">It is important that the right size floor joists be used for the size of the span. For example for a 12 foot span you need at least a 2&#215;8 and preferably a 2&#215;10. For a 14 foot span you need a 2&#215;10, and preferably a 2&#215;12. Also floor joists should be spaced 16 inches on center, or narrower, if floor tile is to be installed above them. In addition, blocking or bridging is also a good idea for beefing up the floor and preventing flexing.<\/p>\n<p>Also, what type of subfloor sheathing (plywood) did he use? It should have been 3\/4 inch tongue and groove plywood with either another 1\/2 of plywood (or cement backer board) on top, running orthogonal to it.<\/td>\n<td style=\"text-align: center;\" width=\"47%\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-3374\" src=\"http:\/\/homeadditionplus.com\/dev\/wp-content\/uploads\/2016\/10\/Grout_Cleaning_2-300x225.jpg\" alt=\"Why is tiled floor grout cracking?\" width=\"300\" height=\"225\" srcset=\"https:\/\/homeadditionplus.com\/dev\/wp-content\/uploads\/2016\/10\/Grout_Cleaning_2-300x225.jpg 300w, https:\/\/homeadditionplus.com\/dev\/wp-content\/uploads\/2016\/10\/Grout_Cleaning_2.jpg 640w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>For an inexpensive possible solution I would suggest installing blocking between the floor joists if you have access to them from the basement. This will help mitigate some of the side-to-side flexing of the floor joists and also help a bit with the deflection. If you still have grout cracking and loosening tiles then you&#8217;ll have no choice but to beef up the floor joists and\/or increase the amount of subfloor sheathing. If you don\u2019t want to go that route then you may want to think about ripping up the ceramic tile floor altogether and installing a Linoleum floor instead.<\/p>\n<\/div>\n<hr \/>\n<p><strong><span style=\"color: #008000; font-size: large;\">For information on installing a shower pan membrane liner for a ceramic tile shower<\/span><\/strong>, see the <span style=\"color: #0000ff;\"><strong><a style=\"color: #0000ff;\" href=\"http:\/\/homeadditionplus.com\/dev\/ebooks\/shower-pan-membrane-ebook\/\">Shower Pan Membrane Liner Installation Ebook<\/a><\/strong><\/span> from HomeAdditionPlus.com.\u00a0 The Shower Pan Membrane Liner EBook will quickly teach you the step-by-step process for installing the shower pan membrane liner correctly. It includes instructions on framing the shower stall, pouring the pre-slope and shower base mortar, and installing the shower pan membrane liner.<\/p>\n<p><b><span style=\"font-size: large;\">See HomeAdditionPlus.com&#8217;s <\/span><a href=\"http:\/\/homeadditionplus.com\/tile-stone-info\/Ceramic-Tile-Calculator.htm\"><span style=\"color: #008000; font-size: large;\">Ceramic Tile Calculator<\/span><\/a><\/b><\/p>\n<p><b><span style=\"color: #008000; font-size: large;\">See my &#8220;How to Tile a Custom Ceramic Tile Shower&#8221; Ebook to learn how to tile your own shower<\/span><\/b>:\u00a0 For a detailed set of instructions on tiling a shower floor and walls, including pictures for every step in the process, see my \u201c<b><a href=\"http:\/\/homeadditionplus.com\/dev\/ebooks\/how-to-tile-custom-ceramic-tile-shower-ebook\/\"><span style=\"color: #0000ff;\">How to Tile Custom Ceramic Tile Shower Ebook<\/span><\/a><\/b>\u201d.<\/p>\n<h3 align=\"left\"><span style=\"color: #008000; font-size: large;\"><b>Related\u00a0Information<\/b><\/span><\/h3>\n<ul>\n<li><span style=\"font-size: large; color: #0000ff;\"><b><a style=\"color: #0000ff;\" href=\"http:\/\/homeadditionplus.com\/dev\/tiling-floors-walls\/how-to-grout-tile-video\/\">How to Grout Tile Video<\/a><\/b><\/span><\/li>\n<li><span style=\"font-size: large; color: #0000ff;\"><b><a style=\"color: #0000ff;\" href=\"http:\/\/homeadditionplus.com\/dev\/tiling-floors-walls\/setting-bathroom-floor-tile\/\">Setting Bathroom Floor Tile<\/a><\/b><\/span><\/li>\n<li><span style=\"color: #0000ff; font-size: large;\"><b><a style=\"color: #0000ff;\" href=\"http:\/\/homeadditionplus.com\/dev\/tiling-floors-walls\/applying-grout-to-ceramic-tile\/\">How to Apply Grout to Ceramic Tile<\/a><\/b><\/span><\/li>\n<\/ul>\n<hr \/>\n<h2 align=\"left\"><b><span style=\"color: #008000; font-size: large;\">Additional Ceramic Tile Resources from Amazon.com<\/span><\/b><\/h2>\n<table id=\"AutoNumber9\" border=\"0\" width=\"100%\" cellspacing=\"0\" cellpadding=\"0\">\n<tbody>\n<tr>\n<td align=\"center\" width=\"25%\">\u00a0<a href=\"http:\/\/www.amazon.com\/exec\/obidos\/redirect?link_code=as2&amp;path=ASIN\/1589230949&amp;tag=wwwhomeadditi-20&amp;camp=1789&amp;creative=9325\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/homeadditionplus.com\/images\/1589230949.01._AA_SCMZZZZZZZ_V53966268_.jpg\" width=\"122\" height=\"160\" border=\"0\" \/><\/a><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/www.assoc-amazon.com\/e\/ir?t=wwwhomeadditi-20&amp;l=as2&amp;o=1&amp;a=1589230949\" alt=\"\" width=\"1\" height=\"1\" border=\"0\" \/><\/td>\n<td align=\"center\" width=\"25%\">\u00a0<a href=\"http:\/\/www.amazon.com\/exec\/obidos\/redirect?link_code=as2&amp;path=ASIN\/1580111033&amp;tag=wwwhomeadditi-20&amp;camp=1789&amp;creative=9325\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/homeadditionplus.com\/images\/1580111033.01._AA_SCMZZZZZZZ_.jpg\" width=\"125\" height=\"160\" border=\"0\" \/><\/a><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/www.assoc-amazon.com\/e\/ir?t=wwwhomeadditi-20&amp;l=as2&amp;o=1&amp;a=1580111033\" alt=\"\" width=\"1\" height=\"1\" border=\"0\" \/><\/td>\n<td align=\"center\" width=\"25%\">\u00a0<a href=\"http:\/\/www.amazon.com\/exec\/obidos\/redirect?link_code=as2&amp;path=ASIN\/0974275433&amp;tag=wwwhomeadditi-20&amp;camp=1789&amp;creative=9325\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/homeadditionplus.com\/images\/0974275433.01._AA_SCMZZZZZZZ_.jpg\" width=\"95\" height=\"140\" border=\"0\" \/><\/a><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/www.assoc-amazon.com\/e\/ir?t=wwwhomeadditi-20&amp;l=as2&amp;o=1&amp;a=0974275433\" alt=\"\" width=\"1\" height=\"1\" border=\"0\" \/><\/td>\n<td align=\"center\" width=\"25%\"><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<hr \/>\n<h3><span style=\"color: #008000; font-size: medium;\"><b>Get Free Bathroom Remodeling Price Quotes\u00a0with\u00a0No Obligation!<\/b><\/span><\/h3>\n<p>Fill out our 3-5 minute quick and easy form, and receive a free price quote\u00a0on a bathroom remodeling project\u00a0from one of our pre-screened and licensed bathroom\u00a0remodeling contractors. This process is free and there is no obligation to\u00a0continue once you receive your bathroom addition price estimate.<\/p>\n<p><iframe loading=\"lazy\" src=\"https:\/\/www.inforequests.com\/pub5x\/?allowRefNet=N&amp;layout=H&amp;PublisherSubID=Bathroom_Remodel_Bottom&amp;url=http:\/\/g.gaesy.com\/cgi\/r?;n=203;c=622397;s=4383;x=7936;f=201006161516140;u=j;z=TIMESTAMP;&amp;servicescheckbox=BATH_REMODEL&amp;submit=submit\" width=\"660\" height=\"560\" frameborder=\"0\" scrolling=\"no\"><\/iframe><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Subfloor Deflection Needs to be Nearly Non Existent When Installing a Ceramic Tile Floor By Mark J. Donovan Question: Mark, We had a ceramic tile kitchen floor installed less than a year ago, and now the grout is cracking and some of the tiles are loose. When we had the kitchen remodeled the contractor gutted the kitchen down to the bare floor joists and sistered them with additional lumber to make them level. He then laid down new plywood onto the floor joists. Next he installed Hardibacker cement board on&hellip;<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":2045,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-3543","page","type-page","status-publish","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Why is Floor Grout Cracking and Tiles Loosening? - HomeAdditionPlus.com<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/homeadditionplus.com\/dev\/tiling-floors-walls\/why-is-floor-grout-cracking-tile-loosening\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Why is Floor Grout Cracking and Tiles Loosening? - HomeAdditionPlus.com\" \/>\n<meta property=\"og:description\" content=\"Subfloor Deflection Needs to be Nearly Non Existent When Installing a Ceramic Tile Floor By Mark J. Donovan Question: Mark, We had a ceramic tile kitchen floor installed less than a year ago, and now the grout is cracking and some of the tiles are loose. When we had the kitchen remodeled the contractor gutted the kitchen down to the bare floor joists and sistered them with additional lumber to make them level. He then laid down new plywood onto the floor joists. 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