Pack wood putty into the hole using a trowel.
How to repair water damaged masonite siding.
Scrape off flaking paint and debris from the damaged area using a paint scraper.
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.
Here are a few tips on how to repair masonite siding.
Scrub the surface of the rot or damage with a wire brush to remove loose fibers and soft spots.
Slightly overlap the putty onto the surrounding hardboard by 1 inch.
On discovering any of these problems fix it before it escalates out of hand.
Then apply some primer over the affected area.
Use a pencil to clearly identify the area.
If the masonite is already compromised scrape off the area in consideration.
Scrub the brush around the hole to dislodge dirt and debris.
The repair is simple if you follow the details in the illustration above.
In order to go about your repair project effectively mark out the area that has been damaged.
Locate and cut the damage.
Remove the damaged area.
How to repair masonite siding with putty.
The sheathing and framing sometimes need repairs too but that is less common.