Lint is kindling, and a dryer duct packs it tighter every load. Failure to clean dryer vents is one of the leading causes of residential fires in Canada — and well before a fire, a clogged vent shows up as towels needing two cycles, a hot laundry room, and a dryer working itself to death.
We clean the full run — from the dryer connection, through the wall/ceiling duct, to the exterior hood — with rotary brushes and reverse airflow, then verify flow at the outside termination. Long runs to upper-floor laundry rooms (common in newer Guelph subdivisions) are exactly the ones that need this most.
Annually for most households; every 6 months for big families, pet households, or runs longer than ~25 feet.
Clothes taking multiple cycles, the dryer top hot to the touch, a burning smell, lint around the exterior flap, or the flap not opening when the dryer runs.
Yes, roof terminations are routine (and chronically neglected — birds love them). They're the 'long/complex' tier in our pricing.
It's legal but lousy — the ridges trap lint and it crushes flat behind the machine. We recommend (and can swap in) smooth rigid or semi-rigid duct.