Hardiebacker Cement Board Screws

Why can t i get screws to sit flush with the hardiebacker cement board.

Hardiebacker cement board screws.

Three by five hardiebacker sheets have dots to indicate where the screws should be set. Cement board attached to plywood or similar underlayment will hold with only 1 1 4 inch screws. Backer on 9 x 1 1 4 in zinc plated star drive interior cement board screws 750 count. Offset the interior screws so they are staggered with the outer screws and make sure no screws are closer than two inches from the edge.

Drive the screws in so that the heads are slightly below the surface of the backerboard sheet. A 50mm alkaline resistant fibatape should be added over the joints and the tiles installed onto the boards. Are you sure the chipboard is 20mm and not 18mm. Cement board screws are designed for attaching hardiebacker or equivalent fiber cement backerboard to wood or light gauge steel studs.

Drill screws through the backerboard sheets every 6 to 8 inches. That s why it was named the most preferred brand of backer board by tile installers and contractors according to the 2019 tile and stone report conducted by clearseas research in partnership with the national tile contractors association and tile magazine. Backer on s patented serrated head design countersinks for flush seating at any angle providing a smooth surface for tile. Position the screws at least 1 2 inch but no more than 2 inches from the edge of the sheet.

Cement board screws the backer on 2 1 4 in. Be sure to use the specified screws 1 1 4 no 8 18 by 3 8 hd hi lo s or s 12 for metal studs ribbed phil wafer head self drilling corrosion resistant screws. Hardie screws are only part threaded so that the board is pulled down onto the floor below and the screws cut their own countersink. The backer on 1 1 4 cement board screws are designed for attaching hardiebacker or equivalent fiber cement backer board to wood or light gauge steel studs br.

For thick or heavy metal fixtures use 1 5 8 inch screws. The boards are fixed to the subfloor surface with screws and nails installed every 200mm 15mm apart from the edges of the board and 50mm from its corners. Serrated head star drive cement board screws 100 pack the backer on 2 1 4 in. There are not many part threaded 25mm screws so if you go away from hardie you will need to pre drill.

The screws that you are using do not have the power to rout out the material in order for the screw head to sit flush. Screw the hardiebacker into the floor using 1 inch backerboard screws and using one screw every 8 inches.