![]() Typically, an interior concrete slab on-grade will have a saw-cut grid this is your layout. ![]() These drawing must be in compliance with EJ171. Often though, the tile section specification asks for shop drawings from the tile contractor showing locations of movement joints, which the tile contractor will then install. The design professional is supposed to show the specific locations and details of movement joints in tile work and specify the sealant application in the sealant section of the specifications. In this article, we’ll go a bit deeper and real-world. If you install sealant, you must also know ASTM C1193 Standard Guide for Use of Joint Sealants, which explains proper movement joint construction. The article assumes you know this section, as you must if you install tile, and should if you’re in the industry. Please don’t read this article until you familiarize yourself with the aforementioned Handbook section. This is why movement joints in tile work are “essential and required” in the Tile Council of North America (TCNA) Handbook for Ceramic Tile, Glass and Stone Tile Installation’s Movement Joint Guidelines section EJ171. All construction materials move – at different rates from other materials – and in some cases can expand and contract very quickly.
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