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What can I do about Ventilation in my Attic? PDF Print E-mail
Wednesday, 17 February 2010

Petrus wrote into us about a ventilation problem in his attic and asked Les what he could do?

I have an attic room with a single drywall and I have a corrugated roof.  The attic room is extremely hot in summer.  I'm a new owner, so don't know yet what it's like in the winter.

There is currently no insulation and it looks like there may also be a ventilation problem.

The construction of the room is fairly close to the roof, making insulation in the ceiling difficult.

I'm looking for an expert to give me advice on the ventilation and insulation of the room to make the room more liveable.  Who can I approach for advice?


Hello Petrus, Thank you for your enquiry.

There are a few things that you can do to insulate the room and make it cooler.

The easiest for you would be to install a polystyrene ceiling under (against) your existing ceiling. EPS comes in sheets and is easy to install. You can get smooth sheets or ones that have grooves moulded in to give a painted plank look. It will greatly reduce the transfer of heat from the roof into the room and keep the heat in during the winter. Any builder's merchant who stock Sagex products will be able to help you in that regard. (See

As far as ventilation goes, once again, if heat can't get out and be replace by cool air then you would generally have a problem. Depending on the layout of the space, windows on gable walls, if there are any are always first prize. If windows are not really an option then a mechanical vent to the outside which is fan operated or a whirleybird type vent as close to the apex of the roof as possible can be considered. Roof windows are also a possibility but they are quite pricy and you would need to look at the local municipal regulations before installing one.

I hope that this helps. If you have any further queries, please give us a call.

Last Updated ( Wednesday, 17 February 2010 )
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