The short answer
Assess the Damage First
Before you patch any hole, look at what is behind it. If the hole goes through to the sheathing or framing, water may have already gotten inside. Probe the area with a screwdriver to feel for soft, rotted wood. If you find rot, you need to replace the damaged wood before closing the hole.
Also check the siding material. Vinyl, wood, fiber cement, and aluminum each need a slightly different approach. For example, vinyl can be patched with a heat-welded repair, while wood needs a filler and paint. Knowing your siding type tells you which products to buy.
Gather the Right Materials
For small holes, you need exterior-grade caulk, a putty knife, and paint that matches your siding. For larger holes, you need a piece of matching siding, a circular saw, galvanized nails or stainless screws, and exterior sealant. Wear safety glasses and gloves when cutting.
If the hole is from a nail pop or a small crack, a tube of exterior spackle works. For a hole bigger than a quarter, plan to cut a patch. Measure the hole and add a few inches on each side so the patch overlaps the existing siding.
- Exterior caulk or patching compound
- Putty knife and sandpaper
- Matching siding piece for large holes
- Circular saw or utility knife
- Galvanized nails or stainless screws
- Exterior sealant and paint
Patch Small Holes
Clean the hole with a wire brush to remove dirt and loose bits. Wipe the area with a damp cloth and let it dry completely. Apply the caulk or patching compound with a putty knife, pressing it into the hole. Smooth the surface so it is level with the siding.
Let the patch cure according to the product instructions. Once dry, sand it lightly if needed. Then apply a coat of exterior primer and paint to match the rest of the siding. This seals the patch from moisture.
Replace Large Sections
For a hole larger than a few inches, cut out the damaged section. Use a circular saw set to the depth of the siding, and make straight cuts. Remove the damaged piece. Cut a new piece of siding to fit, leaving a small gap for expansion. Slide it into place and secure it with nails or screws.
Seal all edges with exterior caulk. If the hole is near a corner or window, you may need to remove trim to get a clean fit. Take your time to match the profile of the existing siding so the repair blends in.
When to Call in the Pros
If the hole reveals water damage, mold, or rot behind the siding, that is a bigger issue. Simply patching the hole will hide the problem, but the moisture can spread. You may need to have the area dried out and the damaged framing replaced before closing it up.
Local water damage pros can inspect the area and dry out hidden moisture. They use moisture meters to find wet spots and structural drying equipment to remove trapped water. If you live in Layton, keep a list of trusted pros handy for such situations.
If you suspect water has gotten behind the siding, consider a water damage inspection to see the full extent. Catching it early prevents costly repairs inside your walls.
- Soft or rotted wood behind the hole
- Visible mold or musty smell
- Water stains on interior walls
- Hole larger than a foot across
- Multiple holes in the same area
Water damage does not wait
Call (801) 383-0232 any time, day or night, and describe what happened.
Call Now (801) 383-0232Frequently asked questions
Can I use expanding foam to fill a hole in siding?
Expanding foam works as a backing for large holes, but it is not a final patch. Foam absorbs water and can push siding out of shape. Use foam only to fill deep gaps, then cover it with exterior caulk and paint. For the right results, replace the damaged siding piece.
How do I match the color of my siding?
Take a small piece of the old siding to a paint store and have it color-matched. If your siding is factory-colored, ask for the manufacturer's color code. For vinyl, you can buy a matching patch piece. Always test the paint on a hidden spot before applying.
What if the hole is from a bullet or a BB?
Small punctures from projectiles are usually cosmetic. Clean the hole, fill it with exterior caulk, and paint over it. If the projectile went through to the interior wall, check for damage inside. If you find a hole inside, patch both sides and inspect for water entry.