Patching Cement Board Siding

If you are removing more than one level of siding in an area start at the bottom and work your way up.

Patching cement board siding.

The e cut blade works great for cuting out the nails. Fein multimaster is excellent for this. Though it is a tough wearing product the surface of the siding can sometimes be damaged during installation by unusual wear or by impact. The cement basis of the product dictates the use of thin set mortar to properly repair cracks or holes.

Use only as much water as the manufacturer recommends. Apply the patch product and paint on a day with no rain to speed drying and curing time and prevent water damage to your patch project. Use wood shims to hold the top board away from the wall while you continue to remove nails along the length. Use the carbide grit blade to cut out the bulk of the clap.

This will allow the patching compound to lock in behind the cement board. Mix a solution of 1 2 cup trisodium phosphate and 1 gallon of water. Remove the nails and countersink any nubs that might prevent your new siding from sliding up under the old. Use only completely acrylic paint and apply with rollers.

Refer to manufacturer recommendations for products that are compatible with fiber cement. If its blind nailed you can usually stick a couple of wood shims under the next clap to give you a bit of clearance. For holes larger than 1 2 inch in diameter use a carton knife or carbide tipped tool to cut a v shaped groove behind the edges of hole. Rinse the siding with clean water to remove the soapy residue.

Using a stiff brush mix the patch material specifically intended for fiber cement following the manufacturer s directions carefully. Fiber cement siding repair or patching re applying caulking when it has begun to show signs of wear can help keep moisture from getting into the wall cavity. Put on a pair of rubber gloves. 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. Hardieplank is a cement lap siding product used on commercial and residential exteriors and is designed for very low maintenance and a long useful life. Depending on the size of your house you may need a ladder to reach the area of siding near the roof. 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.

0 312 in x 8 25 in x 144 in hardieplank primed woodgrain lap fiber cement siding panel. Finally now that your siding is clean and renewed it s ready to paint.