How much does subfloor ventilation cost to install?

There's a musty smell coming up through the floorboards and someone mentioned poor airflow underneath. What would it cost to have extra air bricks or vents put in?

Asked by Patrick on 22nd Jul 2026
Expert Trade Answers
"The cost to install a air brick will be 200 for one
And you will need minimum two
So al together will be 400."
Answered on 22nd Jul 2026 - Member since Jan 2025 - report
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