Under the floor
The musty smell. The mould back in the wardrobe. Floors that feel damp. Most of it starts down here.
- A musty smell that comes back soon after you air the house.
- Mould on clothes and shoes in wardrobes, or behind the bedhead.
- Floors that feel cool and damp underfoot.
- A building or pest inspector has said the sub-floor needs more ventilation.
“I've already got brick vents.”
So why is it still damp under there? Try it.
A small fan, a duct run and a controller.
- Extract fan
- Ducting
- Airflow
- Controls
The fan draws damp air out from under the house, and drier air comes in through your existing vents. The duct runs between the piers to where the air can leave.
We size the fans and the duct run to your house, so the air moves across the whole sub-floor.
We fit German-engineered Blauberg fans, and the warranty is with us for 7 years.
Price
$2,400 to $4,600
including GST, for most homes7 years
warrantyHow it goes
- 1
We come and look under the house, and photograph what we find.
- 2
You get a written quote with the photos and where the fans and ducts will go.
- 3
We install it, test it and show you how the controller works.
Most installs take four to six hours, with two of us on site.
Real jobs. Real sub-floors.
Ducting run between brick piers under an older home. 
Twin-duct system fixed to a concrete slab soffit. 
A long ducted run going in across a basement ceiling. 
Two inline fans, tight to the joists. 
Ducting worked around sandstone and brick under the floor.
From our reviews
Amazing work. Couldn't be happier with the subfloor ventilation installed.
The air feels fresher inside and have not seen any further signs of mould.
Questions
Is sub-floor ventilation the same as subfloor or underfloor ventilation?
Yes. People spell it all three ways. It all means moving damp air out from under a house that sits off the ground.
How much does subfloor ventilation cost on the Northern Beaches?
Our systems are $2,400 to $4,600 including GST, with a 7-year warranty. The size of the sub-floor and the number of fans decide where yours lands. We look first, then send a fixed price in writing.
I've already got brick vents. Why is it still damp under there?
Brick vents only work when wind happens to push air through them, and many are now partly blocked by decks, paving or garden beds. A fan system moves the air every day, whatever the weather.
Will it get rid of the musty smell?
If the smell is coming from damp under the floor, moving that air out is what fixes it. We'll tell you at the look if we think the cause is something else.
Do you do the electrical for the fans too?
Yes. We're licensed electricians, so the power, the controller and the fans are all one job and one quote.
Is the price really fixed?
Yes. Once you've accepted the written quote, that's the price. If we find a genuine surprise, we stop and show you before doing anything extra.
How long does an install take?
Less than a day. Most installs take four to six hours, with two of us on site.
Is it noisy?
Not much. We hang the fans on suspension mounts to cut vibration, and they run at a low hum, under 41 decibels.
The price we quote is the price you pay.
- 1
We come and look. Under the house, in the roof, at the board. We take photos as we go.
- 2
You get the quote in writing, with the photos, so you can see what we saw.
- 3
Once you say yes, the price doesn't move. If we open something up and find a real surprise, we stop, show you, and quote it before we go any further.
Tell us about your house.
A few details and we'll call you back to book a time to look.
We'll call you back, usually the same working day. Prefer to talk now? 0466 805 580.