How To Repair Cement Board Siding

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.

How to repair cement board siding.

Face nail the top piece of fiber cement siding through the old siding. Allow the patch to thoroughly dry and apply another thin layer of patching material if the first layer shrank during the drying process. 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.

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. Watch this video to find out more. 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.

Remove any nails from the top piece of good siding. Dip a soft bristle brush into the solution then scrub the cracked area of fiber cement siding to remove dirt and debris. However even this stuff isn t impervious to the test of time and the forces of nature so you might find yourself needing to give your siding a little sprucing and repair from time to time. Put on a pair of rubber gloves.

Prime and paint new siding to match the old. 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. Cut the fiber cement siding to length wear approved dust protection.