Hardiebacker Cement Board Screws

There are not many part threaded 25mm screws so if you go away from hardie you will need to pre drill.

Hardiebacker cement board screws.

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. Backer on s patented serrated head design countersinks for flush seating at any angle providing a smooth surface for tile. Cement board attached to plywood or similar underlayment will hold with only 1 1 4 inch screws. Cement board screws the backer on 2 1 4 in.

Backer on 9 x 1 1 4 in zinc plated star drive interior cement board screws 750 count. 9 x 2 1 4 in. Screw the hardiebacker into the floor using 1 inch backerboard screws and using one screw every 8 inches. 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.

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. Drive the screws in so that the heads are slightly below the surface of the backerboard sheet. 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.

Why can t i get screws to sit flush with the hardiebacker cement board. Drill screws through the backerboard sheets every 6 to 8 inches. Cement board screws are designed for attaching hardiebacker or equivalent fiber cement backerboard to wood or light gauge steel studs. 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.

Position the screws at least 1 2 inch but no more than 2 inches from the edge of the 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. Three by five hardiebacker sheets have dots to indicate where the screws should be set.

In terms of cement board screws the size of the screw you need will vary depending on the fixture or base to which you attach the board. For thick or heavy metal fixtures use 1 5 8 inch screws.