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  • How to Lay Fiber Rock or Hardy Backer and Get Ready to Lay a Tile Floor.

    I wasn't trying to be overly critical. I think it is great wanting to share a project. It is important though to point out where the instructions provided are in error to help others not make the same mistakes.You may want to read through the installation guide for USG FiberRock (Hardi and other backerboards are similar) because it should not be installed directly over dimensional lumber, whether t & g or not. Plywood or OSB is acceptable. The backerboard panels also must be installed using thinset under the panel. Here are two snippets from the installation guide for USG FiberRock that spells this out quite clearly:The subfloorshould be APA Span-RatedPlywood or OSB with anExposure 1 classificationor better with tongue andgroove or back blocked atthe unsupported edges.Panel App...

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    I wasn't trying to be overly critical. I think it is great wanting to share a project. It is important though to point out where the instructions provided are in error to help others not make the same mistakes.You may want to read through the installation guide for USG FiberRock (Hardi and other backerboards are similar) because it should not be installed directly over dimensional lumber, whether t & g or not. Plywood or OSB is acceptable. The backerboard panels also must be installed using thinset under the panel. Here are two snippets from the installation guide for USG FiberRock that spells this out quite clearly:The subfloorshould be APA Span-RatedPlywood or OSB with anExposure 1 classificationor better with tongue andgroove or back blocked atthe unsupported edges.Panel Application: Apply Type 1 organic adhesivewith 5/32" v-notched trowel,latex-fortified mortar with1/4" square-notched trowel.Comb out adhesive or mortar instraight, parallel rows (as shownbelow) and immediately coverwith panel. Adhere panels tosubfloor, one panel at a time.Here is the link to the installation guide for USG FiberRock: https://www.usg.com/content/usgcom/en/products-sol...

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  • How to Lay Fiber Rock or Hardy Backer and Get Ready to Lay a Tile Floor.

    Many things wrong with this. If you look at manufacturer's installation instructions you will see that installing cement/fiber backer board directly over plank flooring is not correct. The instructions will also tell you to embed the backer board in thinset, this is to fill voids. Every backer board manufacturer I know also expects you to gap the panels, not butt them tight to each other. Do yourself a favor and go to johnbridge.com to get tile install advice from professionals.

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