Roof Dryer Vent Cleaning in Houston, TX

Why does a roof-terminated dryer vent clog faster than a wall vent?

Because the lint has to climb. A roof run in a two-story 1990s suburban build leaves the laundry wall, crosses the attic, then turns up to the cap. Every strap point is a potential sag. Lint settles at the low spot in that sag and stays. Houston intake air is humid, so the lint arrives damp. It packs into a mat instead of drifting out as dry fluff. That mat holds moisture and grows.

The cap itself is the second choke point. Spring pollen bonds to lint on the flapper. Birds and wasps nest inside warm caps during Gulf-coast shoulder seasons. A nest stops airflow completely while the duct below still looks clean from inside.

Cleaning a roof run means working both ends. Rotary brush from the dryer connection, then the cap pulled and cleared from above. Blowing only from the bottom pushes compacted lint up against the flapper. Roof pitch, tile or composition shingle, and attic access all change how the day goes.

Check it yourself first. Multi-cycle drying is the common tell. So is a damp laundry room and a dryer cabinet hot to the touch. Runs over 20 ft or with more than two elbows want annual attention.