How do I secure SunTouch to cement backerboard before applying thinset?
Our super-sticky double sided tape is your best bet when working over a slab, but backerboard can be penetrated by staples. Use a small finish staple gun and air compressor to staple a lot of mat in a very short time, using short leg staples. Remember: Never staple the blue wire or you will damage it. If you find yourself making a lot of cuts to the orange mat to shape it to your room, go back and staple down loose mat so it does not interfere with your trowel later on. When in doubt, apply more staples. The tighter the mat is to the subfloor, the easier it will be to trowel the thinset.
