Expansion joints continue through the tile setting and the substrate. It is normal on a project spec to see that a generic movement joint or perimeter joint has been specified. The minimum width for the perimeter joints is 6mm. movement joint should be cleaned out of residual debris: i.e. In addition, all tile perimeter and transition areas should have movement joints. A movement joint or 'expansion joint' is an intentional interruption in the tile or stone surface to allow for movement in the wall or floor. First, let’s define an expansion joint. Schluter ® - DILEX-BWA is a perimeter joint profile with a rigid PVC anchoring leg and a 3/16” (5 mm)-wide, soft CPE movement zone that isolates the tile covering from fixed building elements, such as bathtubs, shower trays, and door and window frames. That includes all floor and wall applications. Honoring expansion joints in a concrete floor is critical to the success of a ceramic tile floor installation. Account ... > Perimeter Joints If the joint will be exposed, then it should be treated with a suitable flexible sealant. 2.1 If the tiles are well bonded, but lack expansion joints, then the problem might manifest as cracking in the tile or grout. Choosing to ignore them is a bad idea and will eventually come back to haunt the installer for a long time. If the perimeter will be covered with a shoe moulding, then the joint can be left open to allow for the movement. Expansion Joint Placement: All installations require perimeter expansion joints. This means that inside and outside wall corners in showers are to be movement joints. Actually, they don’t go away; they just get worse. A suitable backer rod shall be compressed into the open joint to within one half the width of the joint of the surface of the tile; if the movement joint is 1/2" wide, it should be filled to within 1/4" of the surface of the tile … An expansion joint is a type of movement joint. 2.2 Without enough room for the tile assembly to expand, the tile will pop up or "tent" most times in the middle of the floor. A perimeter joint is simply a generic movement joint where a horizontal surface meets a vertical surface. Telephone: +44 (0)1642 713000 Stokesley Business Park, Stokesley, TS9 5JZ, United Kingdom. dried grout, dried mortar, dirt, etc.
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