How To Repair Cement Board Siding

Refer to manufacturer recommendations for products that are compatible with fiber cement.

How to repair cement board siding. Face nail the top piece of fiber cement siding through the old siding. Blind nail the fiber cement siding in place starting with the bottom piece. Mix a solution of 1 2 cup trisodium phosphate and 1 gallon of water. Put on a pair of rubber gloves.

Prime and paint new siding to match the old. Put on protective eyewear and a face mask. Use a plastic putty knife to apply the patching material to the damaged area filling in the area and shaping the patch to match the original contours of the siding. Watch this video to find out more.

Then using a pry bar gently lift the bottom edge of the overlapping siding. Rinse the siding with clean water to remove the soapy residue. Work your way down the board prying the bottom edge up and loosening the nails. This will allow you to remove the nails without damaging the top piece of siding.

Remove any nails from the top piece of good siding. Fiber cement siding looks like wood but it s actually a tough industrial material alternative that s waterproof fire proof insect resistant making it a very popular choice for most homeowners. Repair or patching fiber cement board siding dents chips cracks and other minor surface damage in james hardie siding and trim products can be filled with cementitious patching compound. Dip a soft bristle brush into the solution then scrub the cracked area of fiber cement siding to remove dirt and debris.