Repairing Hardboard Lap Siding

Remove the nails on the lap board then use the claw of the hammer to split the board down the center image 1.

Repairing hardboard lap siding.

Remove the siding panel that is damage and install a fresh hardboard siding panel. Let each coat of paint dry individually as instructed by the manufacturer. The siding panels nearest to the ground are usually the first to mold. To remove the old siding simply score or cut away any old caulk or paint that might be in the joints.

Repair the siding remove the nails in the corner cap. I used a ryobi jobplus to score ours. This is most common on the bottom few courses near the foundation. Cut fiber cement siding.

Paint the dried putty to match the hardboard siding. If you can see black marks or streaks anywhere on your masonite siding it is a sure sign of being compromised by water. Remove the damaged siding panel using a claw hammer and extract the nails left on the wall from the old panels using tin snips. How to remove and replace siding.

If needed replace the sheathing behind the siding using 1 2 plywood covered with builder s felt or housewrap. Score down the damaged lap siding with a utility knife. If there s a chance to use a power tool i might as well once it s cut you ll simply begin prying away the broken piece. Remove the deteriorated hardboard siding using a pry bar and chisel being careful not to damage the good siding above it.

Loosen the nails found at the top of the damaged siding using a pry bar and hammer and remove them completely. Hardboard lap siding has been used on homes for years because it mimics the look of wood siding but is much less expensive. Check the siding panel for molds holes or any damage. Using a paintbrush apply two coats of exterior house paint over the putty to hide the repair.

One of the disadvantages of hardboard siding is that exposure to water can cause it to deteriorate over time.