Why Proper Roof Ventilation is Crucial

Proper roof ventilation is an important element of proper insulation in your home. It prevents a number of issues from condensation and moisture issues to infringing on your roofing warranty. Here are some of the main reasons proper roof ventilation is crucial:


Condensation takes place when there is water vapour in the air and it comes into contact with cold air. When this occurs, water droplets form and in turn can lead to moisture issues. In worst case scenarios moisture can lead to serious issues such as rot in the wood holding up your roof. It can also lead to less obvious issues such as mold. Proper ventilation stops condensation from occurring by helping to keep air dry instead of moist.


Many home owners, and even some less knowledgeable roofers Ottawa home owners hire do not realize poor ventilation can void your shingle warranty. If the shingle manufacturer inspects your roof and finds damage was caused by improper ventilation they will not replace the shingles. It is very important to work with a roofing company who understands how to manage your roofs ventilation effectively. Poor ventilation can cause damage to your shingles including brittleness. This means they will not be able to do their job of keeping out wind, rain and hail. It will also affect the way they absorb and deflect heat.

Energy Bills

Poor ventilation can also boost your energy bill. When poor ventilation causes heat to pool in your attic that heat can be forced down into your home. That means your air conditioning will have to work harder to keep your house comfortable. The harder your air conditioning has to work, the higher your energy bills.

Additional Moisture Problems

Poorly ventilated roofs can lead to further moisture issues, especially in special roofing such as cathedral ceilings. When a cathedral ceiling is not properly vented it can actually act like a chimney and suck in humid air. This leads to further moisture problems and challenges the effectiveness of your air conditioning.

As you can see having a properly ventilated roof is key to the effectiveness of your roofing. It will also cause damage to your roof’s structure and shingles. This is especially true if the roofers Ottawa area home owners hire do not understand how to use roof ventilation properly.