The Flat Roof Specialists

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flat roof replacement

5 Factors To Consider Before Flat Roof Replacement

Unfortunately, like almost every other roof system, flat roofs deteriorate and eventually fail. A replacement plan should be in place before the inevitable failure of your flat roof.  

But before jumping right into a flat roof replacement, you need to consider a few factors about your existing roof and what you want out of your new roof. Only after considering all factors can you make an informed decision regarding your flat roof replacement. Get the facts before the replacement, and you can also save yourself money in the long run.
The following are five factors you need to consider before making a flat roof replacement decision.


A flat roof’s slope is the most challenging and significant feature of a roof. A flat roof is not entirely flat, and the slope plays an important role in determining how efficiently your roof sheds water. Otherwise, your roof would have a lot of stagnant water that can cause leaks.

In most cases, tapered insulation can accomplish the task of repairing roof slope deficiencies. You have the option to change the slope direction completely, as well as increase the existing roof slope.


The R-value measures how resistant your roof is to heat transfer. Insulation material, thickness, and density determine a building’s R-value. A higher value indicates a more heat-resistant material. 
As you install your roof, consider the current R-value and how that affects your heating and cooling costs. To keep your new roof cost-effective, you need to choose a good thermal insulating material.


Getting rid of water from your roof depends on the drainage system. Hence, if you want to improve your current flat roof drainage, you may have to replace certain drainage systems before you install a new one. For instance, you can have larger downspouts and gutters installed on a roof that has undersized ones. Additionally, a roof with insufficient drainage locations can get more drains installed.

Alternatively, depending on the drainage requirements, you can apply the material in varying depths and improve drainage without extensive repairs.


A structural weight load on your roof is another important factor to consider. With a higher structural load, your roof is at greater risk of sinking. Therefore, you should determine how much weight your roof can support, measured in pounds per square foot (PSF). 

Additionally, you should compare the weight of the new roof system with the weight of the original roof system. Should you have any doubt about how much weight your roof structure can safely support, you need to consult a structural engineer.


The roof deck provides structural support for your flat roof. Therefore, you must ensure the roof deck you currently have is in good condition. You do not need to worry as long as your roof deck is in good condition and can accommodate the extra weight of equipment and workers during the replacement process. 

If, however, the roof decking has damage, you need to repair it before you install a new roof. Alternatively, you can install a new roof deck, and then replace your roof. Otherwise, a new flat roof system will not be worth the investment if it is not structurally sound.
The replacement of a flat roof is a significant investment for your business. The performance of a flat roof system depends on many factors. Therefore, when you replace a roof system, you need to consider the aesthetics and functionality. Alternatively, you can seek advice from a flat roof installation contractor. If you need a flat roof replacement service, contact us at Commercial Solutions, Inc., today.
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