Woodpecker damage to houses ranges from cosmetic nuisance to serious structural problem, depending on why the bird is pecking and how long it goes unaddressed. The holes themselves are only the beginning. Left open, they invite moisture, mold, and secondary insect infestations that can deteriorate your exterior walls over months and years. Understanding what’s driving the behavior is the first step to stopping it and repairing what’s already done.
Why Woodpeckers Target Houses
Woodpeckers peck buildings for three distinct reasons, and each one leaves different evidence. Identifying which behavior you’re dealing with tells you how urgently you need to act and what solution will actually work.
Territorial drumming is the least destructive. Woodpeckers drum on surfaces the same way other birds sing: to advertise their territory and attract mates. They choose your house because hard surfaces like metal gutters, chimney caps, and dry siding produce a loud, resonant sound that carries far. Drumming is typically rapid and rhythmic, often concentrated in spring. It may leave shallow surface marks but rarely creates deep holes.
Foraging for insects is the most common cause of real damage. If you hear sporadic, irregular tapping rather than a steady drumroll, the bird is hunting. Woodpeckers can detect insect larvae vibrating inside wood, and they’ll methodically excavate to reach them. Carpenter bee larvae are a major draw. These bees bore tunnels into eaves, fascia, and siding to lay eggs, and the large, noisy larvae inside attract woodpeckers looking for an easy meal. A foraging woodpecker will feed in one spot for extended periods, tearing out chunks of wood and creating progressively larger holes. If woodpeckers are exploring your eaves, there’s a good chance carpenter bees or other wood-boring insects got there first.
Cavity excavation is the rarest but most damaging behavior. Some woodpeckers will carve out roosting or nesting holes in the side of a house, creating cavities several inches deep that penetrate through siding and into insulation or wall framing.
Which Siding Materials Are Most Vulnerable
Not all exteriors are equally at risk. Cedar, rough pine, and redwood siding are the most frequently damaged, likely because their softer wood is easier to excavate and more attractive to the insects woodpeckers hunt. Synthetic stucco (sometimes called EIFS) is also highly vulnerable. Its foam-backed panels are easy for a woodpecker’s bill to penetrate, and once the outer shell is breached, the bird can quickly hollow out the softer material underneath.
Plywood and Masonite siding are damaged less often, though they’re not immune. Harder materials like fiber cement, brick, and vinyl are rarely targeted. If you’re replacing damaged sections or re-siding a home in an area with heavy woodpecker activity, the material you choose matters.
What Happens When Damage Goes Unrepaired
A single small hole might seem minor, but woodpecker damage compounds quickly. Each hole is an opening for rainwater to penetrate behind your siding. Once moisture reaches the sheathing, insulation, or framing, it creates conditions for wood rot and mold growth. Rotting wood then attracts more insects, which in turn attract more woodpeckers, creating a cycle of escalating damage.
Holes in eaves and fascia boards are particularly problematic because they also provide entry points for squirrels, bats, and other wildlife looking for shelter inside your walls or attic. The longer holes remain open, the more expensive the eventual repair becomes. What starts as a simple patch job can turn into replacing entire sections of siding, treating mold, or addressing water-damaged framing.
How to Repair Woodpecker Holes
For small foraging holes in wood siding, the most durable approach is a two-step fill. Start by spraying expanding foam (like Great Stuff) into the hole to seal the cavity and block moisture. Once it dries, trim the excess flush and cover it with a wood filler or auto-body filler (Bondo). These epoxy-based compounds harden permanently, can be sanded smooth, and accept paint. They’re also tough enough that woodpeckers typically won’t peck through them again. You have roughly 10 minutes of working time before the filler sets, so mix small batches.
For cedar siding, you can texture the dried filler with a wire brush to mimic the wood grain before painting. Paintable caulk works for very small holes but lacks the rigidity needed for larger excavations. Some homeowners have had long-term success with vinyl concrete patch, which is easy to mix and reportedly holds up for 15 years or more in harsh climates.
If a woodpecker has carved a nesting cavity that penetrates deep into the wall, you may need to replace the damaged section of siding entirely and inspect the sheathing and insulation behind it for moisture damage.
Deterrents That Actually Work
The most reliable way to keep woodpeckers off your house is physical exclusion. Bird netting with 3/4-inch mesh, installed from the roof edge down over the affected wall, creates a barrier the birds simply can’t get past. The netting needs to hang a few inches away from the siding so the woodpecker can’t reach through it. Leave it up long enough to break the bird’s habit of returning to that spot, which can take several weeks.
Visual deterrents are a reasonable short-term option while you set up a more permanent solution. Reflective scare tape, holographic pinwheels, and balloon-style eye decoys can startle woodpeckers enough to move them along. The key is placement: hang them as close as possible to the spot where the bird is drilling. Simple aluminum foil strips and basic wind chimes generally aren’t enough on their own. Devices that combine flashing light, movement, and predator-like shapes tend to work better than static objects.
Visual deterrents lose effectiveness over time as the birds habituate, so don’t rely on them as your only strategy. Rotating different scare devices every few days helps. If the underlying problem is an insect infestation, no deterrent will provide a lasting fix until you address the bugs the woodpecker is after.
Address the Insects First
When foraging is the issue, the woodpecker is a symptom, not the root cause. Carpenter bees bore perfectly round half-inch holes into bare or weathered wood, typically on the underside of eaves, deck railings, and fascia. Their larvae develop inside these tunnels through the fall and winter, which is exactly when woodpeckers come looking.
Treating the carpenter bee galleries with an appropriate insecticide dust in late summer or early fall, before larvae mature, removes the food source. Sealing the entrance holes with caulk or wood putty after treatment prevents reuse the following year. Painting or staining bare wood surfaces also helps, since carpenter bees strongly prefer unfinished wood. Once the insect population is controlled, the woodpecker activity typically drops off on its own.
Legal Protections to Know About
All native woodpecker species in the United States are protected under the Migratory Bird Treaty Act. This federal law prohibits killing, capturing, or trapping woodpeckers without a permit from the U.S. Fish and Wildlife Service. You also cannot destroy an active nest. Lethal control is only authorized through a depredation permit, which requires demonstrating that non-lethal methods have failed. In practice, this means your options are limited to deterrence, exclusion, and habitat modification. Fortunately, those approaches work well when applied consistently, especially when combined with insect control.