Signs of Termites in Walls and Drywall
The main signs of termites in walls are tiny pinholes in drywall plugged with dried mud and paint that bubbles or peels with no leak behind it. Look for thin sunken lines winding across the surface and baseboards that sound hollow, too. In DFW, subterranean termites cause these signs as they eat the paper face of the drywall and the wood framing behind it.
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What Termites Eat Inside a Wall
Termites can't digest the gypsum core of drywall, but they eat the paper on both sides of it. Mississippi State University Extension's guide to termite signs points out that they usually eat that paper without breaking the thin coat of paint on top. A wall can look normal while the facing underneath turns to lace.
The bigger target sits behind the drywall. Studs, the sill plate along the slab, baseboards and door frames all hold the cellulose termites live on. They reach that wood from the soil, through cracks in the slab and gaps around pipes, so the damage usually starts low on the wall and works up.
Signs of Termites in Drywall
Each of these signs looks a little different on a finished wall. The table shows what to look for and what it usually means.
| Sign | What it looks like | What it usually means |
|---|---|---|
| Mud-filled pinholes | Spots of dried mud about the size of a BB | Termites broke through the surface and patched the hole |
| Sunken, winding lines | Narrow grooves or dips under paint or wallpaper | Tunnels running just beneath the paper facing |
| Bubbling or peeling paint | Raised patches with no water stain or leak nearby | Moisture from termite tunnels behind the paint |
| Soft or sagging drywall | A spot that dents under light thumb pressure | Termites have eaten away the paper facing |
| Mud stalks | Tiny tan tubes sticking out of the wall or ceiling | Workers tunneled up inside the wall void |
| Hollow baseboards | A dull, papery sound when tapped | Termites have hollowed out the wood behind the paint |
| Cracked or soft door frames | Trim that crumbles or flakes at the bottom | Termites feeding on framing near the slab |
Pinholes are the sign most people miss. Termites dislike open air, so when they cut through the surface by accident, they seal the opening with mud right away. A few of those dots near a baseboard are worth a close look.
How to Check a Wall for Termites
You can check a suspicious spot yourself without opening the wall. These steps follow the approach Mississippi State recommends for pinholes.
- Scrape one of the mud dots gently with a fingernail or a putty knife and look for a small hole underneath.
- Mark the spot with a pencil and check back over the next few days to see whether fresh mud has sealed it again.
- Press along the bottom of the wall and the baseboards with your thumb to find soft or hollow areas.
- Look at the walls next to tubs, showers and sinks, where plumbing runs through the slab.
- Check the garage, where drywall often sits right against the concrete.
If mud reappears in a hole you scraped open, the termites are active. Leave the rest of the wall alone after that. Termites quickly abandon a spot once someone disturbs it, which makes a professional check harder.
Termite Damage or Water Damage?
Both can bubble paint and soften drywall, so the cause isn't always obvious. Water damage usually comes with a brown stain, a musty smell and a source above it, such as a plumbing leak or a roof leak. Termite damage tends to show up with no stain at all, often low on the wall, and with mud inside any holes or tunnels.
The two problems also feed each other. Texas A&M AgriLife's subterranean termite guide tells homeowners to watch for unusual blistering in paint or wallboard. It also notes that stains from water leaks can point to decaying wood that draws termites. Fix any leak you find, even if termites turn out not to be the cause.
How Termites Get Into DFW Walls
Most DFW homes sit on a concrete slab, and termites come up through it from the soil. They use cracks, expansion joints and the open soil under bathtubs, called bath traps. Weep holes in brick veneer can give them a hidden route too, especially when mulch or soil covers them. From there, they build mud tubes inside the wall cavity, where you can't see them from either side.
That's why wall damage often shows up first in bathrooms, along exterior walls and near the garage. Our termite inspection for DFW homes checks those entry points along with the walls themselves. Homes near our Aubrey office can book the same visit through termite inspection in Aubrey.
Termites in Walls FAQ
Can termites eat through drywall?
They eat the paper facing and can bore small holes through drywall on their way to wood, but they can't digest the gypsum itself. Most of the damage that matters is in the studs and trim behind the drywall.
Can you see termites inside the walls?
Rarely. They stay inside mud tubes and tunnels, away from light and dry air. You'll usually see their mud and the damage they leave, or the winged swarmers that fly out in spring.
Does drywall damage mean the framing is damaged too?
Often, yes. Termites eat drywall paper on the way to the wood, so damage on the surface usually means they've reached the studs or sill plate. Only a closer look at the framing tells you how far it goes.
Will spraying the wall kill the termites?
No. Spraying the wall reaches only the termites near the surface, and the colony lives in the soil. Our Sentricon termite treatment targets the whole colony with bait stations in the ground, checked once a year and re-baited only when needed.
Mud dots or bubbling paint low on a wall deserve a closer look. Book a termite inspection online or by phone, and we'll trace where the termites are getting in.
