Clean-edged chewing in one small area
A single opening with tooth marks, shredded edges, or repeated gnawing near a corner or seam.
Start here: Check whether the deck lattice panel alone is damaged or whether the trim and frame behind it are loose.
Deck animal damage
Squirrel Chewed Deck Lattice
Direct answer: Most squirrel-chewed deck lattice is a localized panel problem, but you need to confirm the animals did not chew through already-soft wood or open a larger access point under the deck.
Most likely: The usual fix is replacing or patching the damaged deck lattice section and tightening the trim or fasteners around it after you confirm the surrounding frame is still solid.
Start with the damaged spot itself, then check the trim, lattice frame, and the area behind it. If the lattice is the only thing damaged, this is usually a manageable repair. Reality check: lattice is often sacrificial, but the framing behind it should not feel soft or loose. Common wrong move: screwing a patch over a hidden nest opening and trapping animals underneath.
Don’t start with: Do not start by covering the hole while squirrels are still using it, and do not assume every ragged opening is fresh chewing. Rot and loose lattice often get blamed on squirrels after the fact.
If the damage is only in a thin panelcheck for chew marks, loose fasteners, and a solid frame before replacing the deck lattice section.
If the wood around the opening feels soft or crumblestreat it as a deck rot problem first, not just squirrel damage.
Last reviewed: 2026-04-21
What the damage pattern usually tells you
Large broken-out section
A whole piece is missing, split, or hanging loose, often after weathering plus animal activity.
Start here: Look for failed fasteners, brittle material, or rot that made the panel easy to tear out.
Soft wood around the opening
The lattice, trim, or lower framing feels punky, flakes apart, or stays damp near grade.
Start here: Probe the surrounding wood first. Squirrels may be exploiting decay rather than causing the main failure.
Noise or nesting under the deck
You hear scratching, see nesting material, or notice repeated traffic through the opening.
Start here: Do not close the opening yet. Make sure the space is empty before repairing the deck lattice.
Most likely causes
1. Localized squirrel chewing on a deck lattice panel
You see fresh tooth marks, shredded edges, and damage concentrated at one weak spot or corner.
Quick check: Press on the panel and the trim around it. If the frame is firm and only the panel is damaged, this is the leading cause.
2. Weathered or brittle deck lattice that failed easily
Older lattice often cracks, splits, or snaps at staples and screws, then animals enlarge the opening.
Quick check: Look for faded, brittle material, old cracks, and multiple loose attachment points beyond the chew area.
3. Rot in deck lattice trim or lower framing
Squirrels usually do not chew through sound, solid framing. Soft wood behind the lattice points to moisture damage first.
Quick check: Use a screwdriver to probe the trim and frame near the opening. If it sinks in easily, the wood is already compromised.
4. Active nesting or repeated animal entry under the deck
A repaired hole will fail again if animals are still using that route.
Quick check: Look for droppings, nesting material, fresh tracks, or regular movement at dawn or dusk.
Step-by-step fix
Step 1: Confirm whether this is active animal entry or old damage
You do not want to seal animals inside, and you do not want to repair a spot that will be chewed open again the same week.
- Watch the opening from a distance around early morning or near dusk for a day or two if activity is unclear.
- Look for fresh chew marks, droppings, nesting material, or a worn path in the soil under the opening.
- Check whether the hole leads directly into open space under the deck or just through a decorative panel with solid framing behind it.
- If you hear movement under the deck, pause the repair until you are sure the space is empty.
Next move: If there is no active use and no sign of nesting, move on to checking the condition of the lattice and frame. If animals are still using the opening, deal with exclusion first, then repair the damaged deck section after the space is clear.
What to conclude: Active traffic means the hole is serving a purpose, not just showing old cosmetic damage.
Stop if:
- You see or hear active animals under the deck and cannot confirm they are out.
- You find a nest with young animals.
- You cannot safely access the damaged area without crawling into a tight or unstable space.
Step 2: Separate panel damage from frame damage
This is the fork that matters most. A broken deck lattice panel is a simple repair. Soft or loose framing is not.
- Push gently on the damaged deck lattice and on the trim pieces that hold it in place.
- Probe the surrounding wood with a screwdriver, especially along the bottom edge where splashback and soil contact cause rot.
- Check whether fasteners have simply pulled out of solid wood or whether the wood itself is crumbling around them.
- Look behind the opening with a flashlight for split cleats, loose blocking, or decayed lower framing.
Next move: If the frame is solid and the damage is limited to the lattice or trim, you can plan a localized repair. If the wood behind the lattice is soft, split, or loose, stop treating this as a simple panel replacement and repair the supporting deck skirting frame first.
What to conclude: A solid frame supports a straightforward lattice repair. Soft framing means moisture or structural deterioration is part of the problem.
Step 3: Check why the spot was vulnerable
If you skip the reason the opening started, the new repair often fails in the same place.
- Look for ground contact, mulch piled against the lattice, or soil that keeps the bottom edge wet.
- Check for missing trim, loose corners, or a gap that gave squirrels a starting point to chew or pry.
- Inspect nearby downspouts, splash patterns, and shaded damp areas that keep the skirting wet.
- If the panel is plastic or thin wood lattice, look for sun brittleness, cracking, or old staple holes that widened over time.
Next move: If you find a clear weak point, correct it during the repair so the replacement lasts longer. If nothing obvious stands out, assume the opening itself became the attractor and make the repaired section tighter and better supported than before.
Step 4: Repair the damaged deck lattice section and secure the opening properly
Once you know the frame is sound and the space is clear, the repair is mostly about restoring a firm, tight panel with solid attachment points.
- Remove the broken deck lattice section and any split trim that no longer holds fasteners securely.
- Cut back to sound material so the new piece lands on solid support instead of bridging over broken edges.
- Reattach or replace the deck lattice trim or cleats as needed so the panel is supported on all sides.
- Install the replacement deck lattice section with exterior-rated deck fasteners sized for the trim or support material.
- Keep the bottom edge out of constant soil contact and avoid leaving a loose corner or starter gap.
Next move: If the new section sits flat, feels firm, and closes the access point without wobble, the repair is on the right track. If the panel still flexes, fasteners will not hold, or the opening cannot be closed tightly because the frame is out of shape, rebuild the damaged support area before reinstalling lattice.
Step 5: Finish with a recheck so the repair does not turn into repeat damage
A quick final check catches the usual reasons squirrels come right back: movement, gaps, and hidden activity.
- Press on the repaired area from several points to make sure the deck lattice and trim do not rattle or bow inward.
- Look for any remaining side gaps, corner openings, or lifted edges large enough for an animal to start chewing again.
- Clean out nesting debris from accessible areas under the deck only after you are sure animals are gone.
- Monitor the spot for several evenings for fresh scratching, new chew marks, or disturbed soil.
- If the opening keeps getting targeted despite a solid repair, move from simple repair to a broader animal exclusion plan.
A good result: If the area stays quiet and the panel remains tight, the repair is complete.
If not: If fresh damage shows up again, the issue is no longer just broken lattice. You need exclusion work and a closer look at other entry points around the deck perimeter.
What to conclude: Repeat damage usually means there is still an attractor, another access point, or active animal pressure around the deck.
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FAQ
Can I just patch the hole instead of replacing the whole deck lattice panel?
Yes, if the damage is small and the surrounding deck lattice and trim are still solid. The patch needs firm backing and tight edges. If the panel is brittle or cracked in several places, replacement usually lasts longer.
How do I know if squirrels caused the damage or if the lattice just rotted first?
Fresh chewing usually leaves ragged tooth-marked edges. Rot shows up as softness, flaking, dark staining, or wood that crumbles under a screwdriver. In a lot of cases, squirrels are taking advantage of already-weakened material.
Should I seal the opening right away?
Only after you are sure no animals are still using it. If there is active movement, nesting material, or noise under the deck, deal with exclusion first. Sealing an occupied space creates a bigger problem fast.
What if the wood behind the lattice is soft too?
Then the lattice is not the main repair. You need to remove damaged material and rebuild the affected deck skirting support area before installing new lattice. Fasteners will not hold in rotten wood.
Will squirrels just chew through the new lattice again?
They might if the area still gives them easy access or if another gap nearby stays open. A solid repair with tight trim, no loose corners, and no active nesting pressure holds up much better than a quick cover patch.