Bird nest in a dryer vent
Open farmland and undeveloped ground around most of this town means plenty of birds and not much competition for a warm cavity twenty feet up. A nest closes the duct completely and becomes a fire risk the moment the machine runs.
Calls answered 7am to 8pm · same-day service usually available
Tell us what you can hear and where in the house. You get our view before anybody climbs anything.
How to tell that is what you have
- Scratching, chirping or rustling in the wall or ceiling near the laundry
- The machine went from fine to useless inside a few days rather than gradually
- Twigs, dry grass or feathers on the ground beneath the termination
- The same birds returning to the same spot on the roof
- A strong smell while a cycle runs
- The machine cutting out partway through, or putting up a code
- It is somewhere between February and May
The tempo is the giveaway. Lint takes years. A nest is built in days.
Why a new subdivision is not protection
People assume this is an old-house problem. It is not, and Queen Creek demonstrates why.
What a bird wants is height, shelter, a small opening and a warm cavity behind it. A vent hood on a tile roof provides all four regardless of when the tile was laid. What matters is whether the flap still closes properly, and whether there is anything better nearby.
In a town ringed by worked fields and undeveloped ground, with subdivisions that had their native vegetation scraped off five years ago, there frequently is not anything better nearby. So the vent hood wins, and the newer neighborhoods see this just as much as the older ones.
Why it is more than an inconvenience
Fire
The figures below come from the National Fire Protection Association rather than from us. Failure to clean is the largest single contributing factor in dryer fires in their data, and lint is the material most likely to catch first. A nest is that hazard compressed into a few inches and built from tinder.
Source: National Fire Protection Association, Home Fires Involving Clothes Dryers and Washing Machines.
Moisture
Every load has to discharge its humidity somewhere. Fully obstructed, it goes into the wall cavity and in time becomes damaged drywall and mould.
The appliance
A completely blocked duct has the thermal fuse intervening constantly. Newer machines here will often put up a code or cut out mid-cycle, which at least tells you something is wrong.
The birds
Put bluntly, running the machine with a nest in the duct kills whatever is in it. For most people that settles the question of whether to carry on and hope it resolves itself.
Why not to go up and deal with it
The roof
Concrete tile at two stories is a real hazard in this climate. It fractures where weight goes wrong, and that fracture turns into water getting in months later.
The law
Whether a nest with birds in it is federally protected comes down to the species and the month. The Migratory Bird Treaty Act extends to most native North American birds and makes interfering with an active nest containing eggs or chicks an offense.
You get told which of those you are actually dealing with rather than us assuming or simply pulling it out.
A guard, not a screen
Hardware cloth is the instinctive fix, because it is cheap and it visibly keeps birds out. It also intercepts every fiber the machine produces, so within a season the duct is obstructed by your own lint instead.
Code does not allow it. The termination has to open freely under airflow and screens are specifically excluded, for exactly this reason. A purpose-made guard passes lint and stops birds.
Properly rather than quickly
There is a fast version. Reach up, pull the nest, seat the cap, leave. It resolves nothing, because the compacted material the nest had been holding back is still in the run and the cap that admitted one bird will admit the next.
Our approach: work out what is in the cap and whether anything is living in it, clear it, run the brush the full length of the duct, then fit a correct guard and look over the hood and flap before coming down. It takes longer and it is the only sequence that stops this being an annual event.
Keeping them out
- A guard on the cap, which is the actual fix
- A flap that closes properly when the machine is off
- An intact hood, so there is no open ledge to build on
- Looking at it in January or early February, ahead of the season
- Having the duct done on schedule, so somebody is inspecting that cap regularly
Questions
How do I know that is what it is?
Speed gives it away. Lint chokes a duct over years, a nest appears inside a weekend, so the machine goes from working to useless almost between loads. Listen for scratching or chirping near the laundry, and look for grass and feathers below the termination.
Is it genuinely dangerous?
It is. Dry nesting material sits pressed against a duct carrying heated air, with whatever lint the nest has been damming up behind it. The obstruction also drives every load's moisture into the wall cavity.
Can I clear it myself?
We would advise against it. A two-story tile roof is a real fall risk and tile splits underfoot, which becomes water ingress. And an occupied nest can carry federal protection under the Migratory Bird Treaty Act depending on species and season.
What stops it recurring?
A manufactured cap with a bird guard, sized so lint passes and birds do not. Not screen mesh. Code is explicit: the termination must open freely under airflow and screens are excluded, because they pack with lint and become the hazard they were meant to prevent.
When is nesting season?
Broadly February through May for most of the species that take an interest here. Late January is the time to look at yours.
Is this a problem in newer neighborhoods?
Yes, and sometimes more so. Open farmland and undeveloped desert around a new subdivision means plenty of birds and not much competition for a warm sheltered cavity twenty feet up.
Calls answered 7am to 8pm · same-day service usually available
Nest removal plus the full duct clean. Ring and describe what you can hear.