Birds, Squirrels, and Raccoons in the Chimney: A Lakewood Spring Problem
An uncapped flue on a tree-lined Lakewood street is an open invitation to wildlife, and spring is when it happens most. Here is why animals get into chimneys, the trouble they cause, and how a simple cap keeps them out for good.
Why a chimney looks like a perfect home to wildlife
From an animal's point of view, an uncapped chimney flue is close to ideal real estate. It is a vertical, sheltered shaft, warm relative to the outside in the cold months, hidden from predators, and on Lakewood's mature, tree-lined streets it sits right in the middle of prime habitat. Birds see a chimney the way they see a hollow tree, a safe vertical cavity to build a nest in. Squirrels and raccoons see a den site, a dry, protected space to shelter and to raise young. The flue does not have to be on a wood-burning fireplace, either. Any uncapped flue, including the one venting your furnace or water heater, is fair game.
Spring is when it happens most, because spring is nesting and denning season. A chimney that sat empty all winter can have a bird's nest or a litter of squirrels in it by May, and the homeowner often has no idea until they hear scratching, scrabbling, or chirping coming down the flue, or until they smell something. Raccoons in particular favor chimneys for raising their young, treating the smoke shelf area like a hollow den. The reason it keeps happening in Lakewood specifically is the combination of older housing with original masonry chimneys, plenty of which are uncapped or wearing a failed cap, and the heavy tree cover that puts wildlife right next to those open flues.
The trouble animals in the flue actually cause
An animal in the chimney is more than an unsettling sound. A nest packed into the flue is a blockage, and a blocked flue does not draft, which means a fireplace will spill smoke into the room and, more dangerously, a furnace or water heater venting into that chimney can push combustion gases, including carbon monoxide, back into the house instead of up and out. That is the part most homeowners do not think about, that a bird's nest in the wrong flue is not just a nuisance but a venting hazard. Nesting material is also combustible, so a nest sitting above a working fireplace flue is a genuine fire risk.
Then there is the problem of animals that get in and cannot get out. A bird or a squirrel that falls down the flue and cannot climb back up will die in the chimney, leaving an odor and a mess that works its way into the house, and removing it means opening up the chimney to reach it. Animals also bring droppings, parasites, and debris into the flue, and over a season their activity can damage the smoke shelf, the damper, and the liner. None of this is exotic. It is a routine spring call on the west side, and it is almost entirely preventable with one inexpensive part.
- A nest blocking the flue so the fireplace or furnace cannot vent
- Combustion gases, including carbon monoxide, pushed back into the house
- A fire risk from combustible nesting material above a working flue
- Odor and mess from an animal that gets in and cannot get out
- Droppings, parasites, and debris fouling the flue
- Damage to the damper, smoke shelf, and liner over a season
The cap that closes the door for good
The fix for almost all of this is one small, inexpensive part: a properly fitted chimney cap with animal-resistant mesh. A good cap closes off the top of the flue so birds, squirrels, and raccoons simply cannot get in, while still letting the smoke and combustion gases out cleanly. The same cap keeps rain and snow out of the chimney, so it is doing double duty against the two biggest threats to a flue at once, water and wildlife. For an uncapped Lakewood chimney, fitting a cap is one of the highest-value, lowest-cost things a homeowner can do, and it ends the spring-nesting problem permanently rather than dealing with it animal by animal every year.
Timing and method matter, though. If there is already an animal or an active nest in the chimney, the humane and correct order is to make sure the animals are out, especially young that cannot yet leave on their own, before the flue is capped, because sealing a live animal in is both inhumane and a fast route to the odor problem above. We assess what is actually up there first, make sure the flue is clear and empty, and then fit a cap sized to your chimney and anchored to hold against the wind off the lake. After that, the door is closed for good. If you are hearing scratching in the chimney this spring, or you simply have an uncapped flue and want to stay ahead of it, that is the moment to deal with it.
How to tell what is up there, and what not to do
The sounds give a lot away if you know what to listen for. Persistent scratching and scrabbling against the flue walls, especially during the day, often means a squirrel that has fallen in and is trying to climb back out. Chirping or the rustle of nesting material points to birds, and a particular Lakewood culprit is the chimney swift, a protected migratory bird that nests in flues and whose young make a distinctive chittering sound. Heavy movement, scratching from the smoke shelf area, and activity at dusk and dawn suggest a raccoon, which favors chimneys for denning and raising kits. A smell with no sound usually means an animal has already died in the flue. Knowing roughly what you are dealing with helps, but the right response is the same: get a professional to confirm and handle it.
What you should not do is light a fire to drive an animal out, which is both dangerous and inhumane and can leave you with a panicked or dying animal lodged in the flue and a fire risk from nesting material. You also should not seal the flue while anything is still in it, and you should not climb onto the roof yourself to investigate, particularly given how exposed and weather-worn Lakewood chimneys are. With protected birds like chimney swifts there are also legal limits on when a nest can be disturbed, which is another reason to bring in someone who knows the rules. We assess what is up there, make sure the chimney is genuinely clear and any animals are safely out, and then cap it so the problem does not come back next spring.
If you are hearing scratching or chirping in your Lakewood chimney this spring, or you have an open flue with no cap, the answer is to clear the chimney and cap it properly so it never happens again. We will check what is up there, make sure it is clear, and fit a cap sized and anchored for the lake wind. Call 740-430-5989.
When you are ready, call 740-430-5989 for a chimney inspection.