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Sub floor ventilation

A damp, musty smell inside the house often starts under the floor. Subfloor ventilation uses fans and vents to dry out the space beneath your home.

Find local installersHow it works

A common sign

“The house smells musty, especially in winter.”
That smell often comes from moisture under the floor. Moving air through the subfloor helps dry it out and keeps the smell away.

About sub floor ventilation

Dry out the space under your home.

The space under a raised floor can trap moisture from the ground, especially if vents are blocked or there aren’t enough of them. That damp air can lead to musty smells, mould and rotting timber.

A subfloor ventilation specialist checks how moisture is getting in and how air moves, then installs vents or fans to keep air flowing. Sometimes drainage around the house needs fixing too.

Helps with

Musty smells inside the house

Helps with

Damp or mouldy subfloors

Helps with

Rotting floor timbers

Ask this

Ask what’s causing the damp, not just how to vent it. Leaking pipes or poor drainage need fixing too, or the problem comes back.

Not sure where to start?

Stop guessing, start saving: find your home’s energy score.

Don’t waste money on upgrades you don’t need. A professional home energy assessment shows where your house loses heat and power, so your budget goes where it makes the biggest difference.

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Subfloor ventilation installers

Find subfloor ventilation installers near you.

A few of the 16 listed across Australia

A suburban home seen from the street, with rooftop solar.

Polarised Electrical Services

5.0 56 Google reviews

Rooftop solar installationHome battery installationHeat pump hot water systemsSplit system air conditioningDucted reverse cycle heating and coolingInduction cooktop installationSwitchboard upgradesHome EV charger installationSub floor ventilationThermal imaging and insulation scans

Based in Boronia

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A rammed earth home with a planted green roof and solar panels among ferns and tall trees.

Cummins Contracting

4.7 78 Google reviews

Ducted reverse cycle heating and coolingSplit system air conditioningHeat recovery ventilationSub floor ventilation

Based in Notting Hill

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More in ventilation and mould

Other upgrades in this category.

For the damp bedroom wall, the window that streams with condensation, and the musty smell under the floor.

Before you choose an installer

See our guides on ventilation and damp.

All guides
Ventilation You sealed the house. Now it's damp. Why a tighter house grows condensation and mould, what ventilation actually fixes it, and the order that avoids the problem in the first place. Insulation Where the heat actually leaves your house Ceiling, walls, floor, windows and gaps, in the order they matter, and what each one is worth in a typical brick veneer home. Start here The right order to upgrade your home Insulation before heat pump sizing, sealing before ventilation, and solar later than you would think. The dependencies nobody explains before you are quoted.

Related goal

Damp, mould or stale air?

See the upgrades that improve mould and ventilation, and how they work together.

Improve mould and ventilation See all ventilation and mould upgrades