Flat Roofing FAQ's

Should I slope my flat roof?

Sloping should be considered if the existing structure causes the roof to pond for a prolonged period of time. A general rule of thumb is that if the water evaporates within 72 hours this is generally acceptable. If ponding occurs for a prolonged period of time, and extra drainage cannot be added, then the extra cost for sloping a roof should be considered. In order for certain flat roofing systems to meet manufacturer’s extended warranties sloping is a must. Check with your particular material manufacturer if you have any doubts.

How do I know if the insulation needs to be changed or upgraded?

Insulation should be changed or upgraded if it is wet, does not meet existing building codes for the area, or if the existing insulation is damaging the structure (rusting metal decking, etc.). It also increases savings on utility bills.

My contractor says I can save on cost by using materials leftover from previous jobs?

In this case cutting cost means cutting quality. You do not want your new roof to be installed with mis-matched materials. This can cause leaks and cracks. It is more advisable to spend a little more for quality work.

I’ve received five estimates, all suggesting different work to be done and all completely different price ranges. Help?

Hire a roofing consultant who will assess the estimates, get a specific scope of work and research the company you are considering. Download our “How to evaluate your flat roof estimate?” guide to help make your choice easier.

My neighbour works for a roofing business and does roof repairs and installation by himself in his spare time. Should I enlist his services?

It is very important to have a written contract documenting scope of work, start and end date, liabilities and warranties. Check if  your neighbour can provide you with adequate references, licenses, all the necessary paperwork and will accept a cheque or credit card payment.

What is a scope of work?

A scope of work is a detailed and written process outlining the materials to be used and how the particular materials will be installed. This allows the consumer to compare pricing and what you are getting for money spent. Read the scope of work to ensure you are getting the roof you want.

Are all roofing companies qualified to install and repair flat roofs?

No. A reliable flat roofing company will have years of experience, industry expertise and provide adequate warranties and proper insurance coverage. Check references, licenses, qualifications and business history to determine whether your contractor is well equipped to do your work.

Can I get out of my signed contract?

In Ontario you have up to one week after you have signed your contract to cancel it and get a full refund. You do not have to give a reason but must submit a written cancellation.