I will use a small bit for the hole then i will through each hole and use a larger bit.
Hardibacker ok roofing nails.
That procedure is 100 against what the entire industry recommends for installing tile backer boards.
The gap allows for expansion just like between the walls and the board.
Backer board cutting t square straightedge utility knife or carbide tipped scoring blade or fasteners hammer 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.
Hardiebacker cement board is made better to install better and perform better.
Check with wedi schluter laticrete goboard or whichever manufacturer to see how they want their product installed over a concrete subfloor.
Hammer them so they are flush with the surface of the hardie board.
Keep the fasteners 3 4 inches from edges and 2 inches from corners.
For shower walls that are a little tough i will double predrill for my backer screws.
Planning and executing a good roofing job requires knowledge of every aspect of the job.
The other is foam backer board which is ok to install over concrete.
Space the fasteners 8 inches apart on walls and 6 inches apart on ceilings.
I use hb 30 40 times a year and and i use the hb screws and long roofing nails.
Step 4 set the second piece of hardie board next to the first and leave a gap of 1 8 inch on all sides.
Using the correct size of roofing nail will ensure that your roof stays intact for many years to come and can help you avoid the common problem of roofing nails that extract themselves over time and cause you to lose shingles.
Secure the cement board sheets to the studs with either 1 1 2 inch hot galvanized roofing nails driven with a hammer or 1 1 4 inch cementboard screws driven with a drill and driver bit.
This can be beneficial if you are wanting to insulate concrete from an electric floor heating system above it.
Scrape the floors put down liquid nails lay down the hardi backer then nail the piss out of it with a roofing nailer.