If you've ever filled a large gap with caulk, only to watch it pull away from the edges as it dries, you've experienced one of the primary reasons that backer rod exists. Backer rod does more than ...
The advent of cement backer board has made it possible for do-it-yourselfers to lay tile like a pro. The reason: For most installations, it eliminates the need to set tile in a thick bed of mortar.
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