Roofing Nails With Thinset Mortar

If special screws aren t available attach the cement board with 1 1 2 in.

Roofing nails with thinset mortar.

But this doesn t stop people from trying to use ring shank nails. Most cement board manufacturers require galvanized roofing nails or cement board screws. Gap between sheets of cement board. With the cement board in place use a fiberglass mesh tape and a thin set mortar tape up all your seams.

While nailing the cement board down the spacing should be approximately 8 inches apart. 1 inch corrosion resistant roofing nails 1 inch self drilling corrosion resistant screws drill sponge use a sponge to wet down the backer board before applying thin set above the backer board 2 inch wide alkali resistant fiberglass joint tap setting materials square notch trowel thin set mortar. Then with 2 inch galvanized roofing nails nail through the cement board and into the floor joist cement board screws work as well. When you squeeze the thin set mortar into this gap it will lock the two sheets together and strengthen the seam.

Apr 15 2016 yes thinset will bond to plywood however the thinset under a backer board is really just a filler that prevents hollow gaps that can flex when walked on the roofing nails are doing the actual holding if you want a good bond which is not needed look for a modified thinset approved for setting tile over plywood or mix liquid. Of a little known fact but most cement board manufacturers want fiberglass alkaline resistant mesh tape embedded in thinset mortar over the backer board seams. Hot dipped galvanized roofing nails. Use nails or screws as temporary spacers to create a 1 8 in.

You ll still need to screw it down with deck screws 1 or 1 1 4 and avoid the joists or nail it down with roofing nails.