How To Repair A Chip Edge In Cement Fiber Siding

Put on a pair of rubber gloves.

How to repair a chip edge in cement fiber siding. Step 2 sand over the damaged area lightly but thoroughly with a medium grit sandpaper to smooth any jagged edges and create an easy grip surface for the patch product. 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. Mix a solution of 1 2 cup trisodium phosphate and 1 gallon of water. Dip a soft bristle brush into the solution then scrub the cracked area of fiber cement siding to remove dirt and debris.

To clean it start by taking a light wire brush and dipping it in a buck of water mixed with a cup of bleach and some dishwashing detergent. Refer to manufacturer recommendations for products that are compatible with fiber cement. Step 3 thoroughly rinse the repair area after cleaning. If your repair includes the very bottom tier of siding add a spacer strip the thickness of your siding along the entire bottom edge to mimic the angle of your overlap.

Allow the patch to thoroughly dry and apply another thin layer of patching material if the first layer shrank during the drying process. Scrub away at any bits of mold mildew or stains keep in mind that tough persistent stains might just have to be painted over. Rinse the siding with clean water to remove the soapy residue. Fiber cement lap siding is heavier than wood and requires a special diamond tipped blade or a tungsten carbide saw blade to cut.

Scrub and clean the surface of the repair area with a stiff bristle brush.