It is very common that we are called to inspect an attic for mould, only to discover that either the soffit venting has been covered by insulation or the bathroom venting has been dispersing into the attic.

Have you looked in your attic lately? Is the underside of the roof boards the clean caramel wood colour of plywood or osb? Is there grey, black or even white staining?

To the naked eye this photo of an attic may look just fine – but take note of the difference in colour of the osb around the ventilation hole.

When you turn off your flashlight, do you see light at the edges of the attic – at the soffits? If you do not see light at your soffits that means they may be covered by insulation. This should be pulled back and baffles installed, taking care not to trample or squish the insulation throughout the attic.

Is your attic wet? Mould thrives in moist areas. Where is the bathroom fan venting? The bathroom fan should be venting out the roof in the shortest path possible from the fan. Bathroom venting should not be running for many feed across the attic. It should also not be venting out the soffit vents.

Having a professional come to check in your attic, test your bathroom fan(s) and measuring the humidity levels in your home is an ounce of prevention that’s worth a pound of cure. Mould is not something you want in your attic or your home. 

If mould is left untreated, it will continue to grow and will reduce the value of your property. It actually “eats” your home! Mould’s absolute favourite food is drywall, but it also quite likes osb and plywood on the underside of your roof.

More importantly, mould spores in your home may impact your family’s health – in particular those with asthma or allergies. Studies also show that mould spores will actually affect the immune system of about 25% of us.

So we ask again…what’s in your attic? Don’t ignore what you cant see!