Rats really can chew through walls, and honestly, it’s kind of shocking just how good they are at it. Their teeth are strong enough to bite through drywall, wood, and even thin metal. So if you hear weird scratching or spot little holes in your walls, there’s a decent chance rats have found their way in.
Maybe you’re wondering how quickly rats can do this, or why they even bother with walls. Rats treat walls like highways and safe zones—they hide, nest, and travel through them without anyone noticing.
If you want to know how rats manage to chew through walls, how long it might take, and what you can actually do about it, you’re in the right place. This info should help you keep your home safe and, hopefully, rat-free. For extra details, check how do rats get into walls.
How And Why Rats Chew Through Walls
Rats chew through walls to hunt for food, water, and cozy spots to build nests. Their teeth never stop growing, so they have to gnaw all the time just to keep them in check.
Knowing what they target and how to spot the damage can make a big difference in protecting your house.
What Makes Rats Such Persistent Chewers
Rats have these front teeth (incisors) that just keep on growing. If they don’t chew, their teeth get too long and, well, that’s not good for them.
Their teeth have a super hard front and a softer back, which keeps them sharp as they gnaw. Rats also have surprisingly strong jaws.
They can bite through way more stuff than you might expect. While squirrels mostly chew to stash food, rats chew to explore and create new places to live.
This urge to chew never really stops for them. If you hear gnawing or spot wall damage, rats are probably nearby.
Materials Rats Can And Cannot Chew Through
Rats don’t really care what’s in their way—they’ll chew through drywall, wood, plastic, aluminum, and even the mortar between bricks. They can squeeze through holes the size of a quarter, which is honestly kind of wild.
Electrical wires are another favorite. Rats seem weirdly drawn to the insulation.
But rats can’t chew through solid concrete or steel. Those materials actually stop them cold.
If you use steel wool or metal mesh to block holes, you’ll make it a lot harder for rats to get inside.
Here’s a quick list:
Materials rats chew through:
- Drywall
- Wood (cabinets, baseboards)
- Plastic and PVC
- Aluminum and lead
- Brick and cinder blocks (mortar areas)
- Electrical wires
Materials rats usually cannot chew:
- Solid concrete
- Steel and titanium
Signs Of Wall Chewing By Rodents
If rats have been chewing your walls, you’ll probably notice small holes or rough gnaw marks near baseboards or vents. These spots usually look uneven and messy.
You might also hear scratching or squeaking coming from inside your walls or ceiling, especially at night. Bits of drywall or insulation on the floor are another red flag.
A strong, musty smell from rat urine or nesting material can hang in the air too. If you see chew marks on electrical wires, that’s a big fire risk and a clear sign rats are inside your walls.
Check crawlspaces, vents, and around pipes for any gaps. Catching these early makes things way easier.
For more tips on spotting rat damage, check out this guide to rats chewing walls.
Preventing And Repairing Damage From Rodents
To keep rats out, use tough materials to block their entry and fix any holes you find right away. Sometimes, you’ll need to call in help for a full removal or cleanup.
Effective Materials For Blocking Entry
Rats can get through a lot, but steel mesh is a solid choice for covering vents, holes, or any gaps. It’s tough, and rats have a hard time getting past it.
Seal up cracks around doors—especially the garage door, since rats love to sneak in there. Go with metal or concrete patching, not just caulk or wood, because rats can chew through softer stuff like drywall and plastic.
Check windows, pipes, and vents closely. Seal those openings with steel mesh, heavy-duty metal flashing, or solid concrete.
Repairing Chewed Walls And Entry Points
If you find chewed holes in your walls, drywall, or baseboards, patch them up fast. Cut out the damaged drywall, then replace it with new material.
Add a metal screen underneath for extra protection. For smaller holes, stuff them tight with heavy-duty wire mesh or steel wool before sealing with cement or plaster.
Don’t just use soft materials, or rats will just chew right through again. If you see damaged wiring, be careful—rats love chewing on wires, and it’s a real fire risk.
If the wiring looks bad, call an electrician to replace it safely.
Role Of Professionals In Wildlife Removal
If you notice any signs of rats hiding in your walls or around your home, it’s probably time to call a pest control or wildlife removal expert. These folks can spot nests you’d never find and use traps or safe poisons to get rid of the colony.
They also handle tricky repairs and offer tips on keeping rats out for good. Most of the time, they’ll check places like your garage, attic, and all those hidden wall cavities where rats love to sneak in.
Getting experts involved early really can save you a lot of time and money. It’s a smart move if you want to avoid bigger headaches and protect your home from expensive damage.
