We are going to finish our review of the 10 most common roof problems that plague flat and low-sloped roofs here in Ontario by taking a look at four more commonly seen problems. Check out Part 1 and Part 2 if you haven’t already.

4. Safety

It is important right now to say that these 10 problems are in no particular order so as not to bury safety in the middle. Safety on a low-sloped roof is paramount to any other issue you may have with your roof. Installing the roof, however, brings about its own list of possible problems.

In Ontario, roofing contractors must adhere to strict safety procedures put in place by federal and provincial governments and organizations.

The installation of hot bituminous and torch applied roofing systems can result in burns, fires, and other injuries, not only to the workers, but to anyone who is nearby. Cold-applied systems can result in sickness and discomfort to building occupants, so air flow must be increased during installation.

3. Improper Repairs

Flat roofing contractors must be knowledgeable in all the various materials used in flat and low-sloped roofs. Installing improper materials, or using materials that are designed for specialized installations can result in structural damage to the roof system.

Another common problem often seen by roofing contractors here in Burlington is building owners and caretakers who see a problem like a tear or hole in the roof and take matters into their own hand by using caulking, tape, or whatever they deem suitable for the repair. Some roofing repair materials can actually damage roofs that they are not designed for. Care must be taken to ensure the proper material is used for your particular type of roof.

2. Shrinkage

Shrinkage is common with single-ply membrane roofs like EPDM. This occurs when the field membrane shrinks over time causing the membrane to pull away from flashings and seals around protrusions like pipes and mechanical equipment. Proper installation of the roofing membrane lowers the chances of shrinkage but does not eliminate it entirely.

1. Blistering

Blistering, surface erosion, ridging, and cracking is a common problem with BUR type roofs and often lead to further problems if left resolved. Small blisters are often left alone as they do not pose much danger but larger ones need to be fixed. Blisters form when tar is improperly heated during the installation of hot bituminous roofing systems. Roofing felt slipping during installation can also cause this effect as can dry laps and poorly done interply mopping.

Voids can occur if the membrane is not properly torched modified bitumen systems during installation. This can result in delaminating, slippage, and blistering. Air trapped in between the layers can also cause problems, especially around seams.

During installation of spray foam insulations, blistering can occur if the foam is not allowed to properly dry.

By using a quality minded, flat roofing specialist, like we find here in Ontario, ensures that your particular roof is done correctly from the beginning of the installation. Take care when choosing a contractor and do your homework before laying out the money for your installation or repair. And don’t forget that routine, regular inspections done by a certified low-sloped roofing contractor will ensure your roof lasts a long time.