The corners and edges of the sheets should not touch one another.
Seal between hardibacker floor.
Leave a 1 4 inch gap between the backerboard and the wall.
Run the drywall knife over the mortar to create a smooth finish and remove any excess material.
You will also use it to attach the tile to the backer board.
Apply some thinset to the gap.
It is the material that you use underneath the backer board to attach it to the wood subfloor.
Take a trowel or a taping knife and use it to apply the thinset to the gap.
Seal narrow cracks with paintable or clear latex caulk either at the top or along the bottom where the baseboards meet the floor.
You need to make sure that the entire gap between the boards is filled up with the thinset.
Whether you re laying down a new tile floor or installing a shower you may use a sheathing material such as backerboard.
Backer board by strip of ditra underlayment mesh tape joining strip of underlayment to backer board thinset kerdiband more thinset leg of shiene tile edging thinset and finally tiles.
Although most backerboards currently available won t fall apart when exposed to moisture and are somewhat water resistant they aren t waterproof.
I plan to run a bead of caulk silicone on the tub deck before putting the metal schluter strip in position.
Run a continuous bead of caulk along the gap and smooth it with a.
Leave a 1 8 inch gap between each backerboard sheet.