How To Repair Water Damaged Masonite Siding

Scrub the surface of the rot or damage with a wire brush to remove loose fibers and soft spots.

How to repair water damaged masonite siding. Locate and cut the damage. We tear off the damaged hardboard and replace it with fiber cement siding. Clean the hardboard with a stiff bristle brush. In most cases the original layer of building paper or housewrap at the bottom of the wall was enough to prevent water infiltration and damage beneath the siding.

Use a pencil to clearly identify the area. How to repair masonite siding with putty. The sheathing and framing sometimes need repairs too but that is less common. Remove the damaged area.

Here are a few tips on how to repair masonite siding. On discovering any of these problems fix it before it escalates out of hand. Once the identification has been done use a utility knife to cut through the damaged siding as accurately as possible. Then apply some primer over the affected area.

The repair is simple if you follow the details in the illustration above. Scrub the brush around the hole to dislodge dirt and debris. Pack wood putty into the hole using a trowel. If the masonite is already compromised scrape off the area in consideration.