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Tumble dryer vent opening into a concrete sectional, is it ok?
Anonymous user 17/03/2024 - 2.30 PM
Hi, I have a concrete sectional lean to garage next to my property. But the external vent of my tumble dryer is opening into the garage. Is it an issue? Will it cause damp problems? How can I fix it? Will insulating the garage help or would I have to reroute the vent exhaust to outside the garage?
Are you a tradesperson and able to answer this question?
2 Answers
E.KUQO PAINTING & DECORATIONS LTD
Rating: 4.9 out of 5
Hi the best way is to insulate the place and the exhaust to be outside so the garage can brith fresh air
Answered16 March 2024
2
Anonymous user
Yes, it’s a problem.
When your tumble dryer runs, it pushes out warm, moist air. If that moist air is released into the garage, especially a concrete sectional one that’s not fully sealed or ventilated, then:
Humidity will build up
Cold surfaces (like concrete) will condense the moisture
That can lead to damp patches, mould, and even damage to stored items
🔧 How can I fix it?
✅ Best Option: Reroute the Vent to Outside
Drill a new vent hole in the garage wall and run the duct straight outdoors, not into the garage
Use a proper vent kit with a flap to stop cold air or pests coming in
This will totally remove the moisture issue
🧰 If rerouting isn’t possible right now:
You can temporarily improve the situation — but it’s not ideal:
Add a dehumidifier in the garage (expensive long term)
Keep the garage well ventilated (open vents, windows, or install passive vents)
Insulating the garage won’t solve the issue on its own — in fact, insulation might trap moisture more unless it's combined with proper ventilation
🧱 Will insulating the garage help?
Only a little — and only if done right.
Insulation (walls and ceiling) keeps the garage warmer, so less condensation forms on cold surfaces
But moist air will still be there unless it’s vented out
You’d also need a vapour barrier to stop moisture soaking into insulation
✅ Final Advice:
Option Result Recommended?
Venting into garage Damp, mould, long-term damage risk ❌ No
Rerouting vent outdoors Removes moisture at source ✅ Yes
Just insulating the garage Slight help, but won’t fix moisture ⚠️ Not alone
Adding ventilation & dehumidifier Temporary relief 🟡 Temporary
Answered7 July 2025
0