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Important Things to Consider Before Replacing Your Old Roof

Jul 30, 2019

Replacing your commercial flat roof can quickly become a large task. Not only are there several different types of commercial roofing systems to consider, you’ll also have to think about your current roof and why you need a replacement in the first place.


If you’re looking to replace an old commercial roof in Toronto, there are plenty of things to consider. For starters, why do you want to replace your current roof? Has it reached the end of its lifespan? Or, were other factors involved? Many flat roof replacements in Toronto are needed as a result of improper installation, poor drainage, structural problems, higher energy costs, and more.

If you’re looking to replace your existing flat roof, we ask that you continue reading.

The guidelines below will help ensure that your next commercial roofing system lasts longer than the one you’re replacing.

  1. Flat Roof Repair vs. Flat Roof Replacement 

Before replacing your flat roof entirely, it’s best to know whether it needs a replacement, or if it simply needs repairing. Consider things like safety, function and cost. If your flat roof is structurally stable and requires minor repairs, it may be best for your investment to repair it rather than going through a complete replacement. However, if your flat roof’s lifespan is nearing the end, if it’s suffered severe, unsalvageable damage, or if it’s compromising the structural integrity of your property, it’s most definitely time to seek replacement options.

  1. Climate & Other Weather Effects 

Your climate is an important consideration when replacing your commercial flat roof. If you live in a warmer climate, for example, and your existing roof is not designed for higher temperatures, it has the potential to overheat and expand. Expansion of a commercial flat roof can cause severe structural problems and hefty costs overtime. Additionally, if your flat roof is not designed for the climate in which you reside, chances are you’ll notice higher than normal energy costs. Whatever the case, ensure that the new roof you install is designed specifically for your climate and for your energy-savings budget.

  1. Drainage Functionality


Inadequate roof drainage systems can cause many issues with moisture build up that may be of detriment to your property’s structure. For example, roof drainage systems need to be matched to the size and slope of the roof itself. As the slope of your roof increases, the volume of water that is routed to the drainage system will increase as well. That’s why it’s important to consider drainage when replacing your commercial roof. Ask yourself: are there enough drains, or is your gutter system large enough to handle the volume of water expected to hit your roof? 

  1. Proper Installation

Before hiring a commercial roofing company in Toronto, or letting commercial roofing contractors up onto your roof, you should first understand what the process of flat roof replacement would entail. You’ll want to find out whether the commercial roofers are stripping or layering the roof, whether or not there will be a height difference if you are only partially reroofing, and that they ensure to flash and trim the areas correctly.

Again, before hiring any commercial roofing company, ensure that they are highly trained, certified and have a proven track record of satisfied clients. Above all, a reputable commercial roofing company in Toronto should let you know exactly what they’re doing at all times. It never hurts to be informed on the installation and replacement process.

  1. Warranty 

Before going through with your flat roof replacement, you’ll want to find out what your new roof’s warranty is, and what is and what isn’t covered. After all, commercial roof replacement is an investment for your property, so you should know what your warranty covers, and that you can ensure it gets taken care of – on time and on budget.

Experts in Toronto Commercial Roof Replacement 

If you’re looking for commercial roof replacement professionals in the Greater Toronto Area, contact Crown Industrial Roofing. With over 40 years of experience in Toronto based commercial roofing, we know what it takes to have a superior quality, long lasting, and most importantly, safe commercial or industrial roof for your property.

Book your free inspection today, or call us to speak with one of our commercial roofing experts.