In a typical house, 20–30% of the air moving through ducts leaks out through joints and gaps before it reaches a room. In Halden, where ducts often run through unheated attics, garages and crawlspaces, that means paying to heat the outdoors, and cold rooms at the far end of the run.
We test duct leakage with a pressurizing fan, then seal joints and seams with mastic and foil tape (never cloth duct tape, which fails). We insulate ducts in unheated spaces, and repair crushed, disconnected or undersized runs.
Duct sealing is often the cheapest fix for a cold room, and it makes any new furnace or heat pump more effective.
Signs you need this
- Rooms at the end of a duct run stay cold
- Ducts run through an attic, garage or crawlspace
- Dusty house even with good filters
- High heating bills in a home with a newer furnace
How it works
Leakage test
A pressurizing fan measures how much air your ducts lose.
Seal and insulate
Mastic on joints, insulation in unheated spaces, repairs where ducts are crushed or disconnected.
Re-test
We measure again so you can see the improvement in numbers.
Common questions
Can I seal ducts myself?
The ones you can reach, yes, with mastic or foil tape. Not cloth duct tape. The hard-to-reach joints are usually the leakiest.
Will it fix my cold bedroom?
Often. If the room is at the end of a leaky run, sealing can raise the airflow reaching it by a third or more.
What about ducts in walls?
We can't seal those directly, but we can seal the boots and register connections, where most of the leakage is.