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Installing a Flat Roof On Commercial and Residential Buildings

When constructing or renovating a building, you must consider what type of roofing you'd like to have. Although it sounds simple, the primary goal of a roof system is to protect the integrity of a building.


A flat or low roofing system is seen as the preferred option for many reasons. This roofing system can also be installed in commercial and residential buildings, making it even more favorable.


We are professional roofers, licensed and experienced in installing flat roofs. If you're wondering why you have a flat roof, we've designed this page to help you answer that question.


What Is A Flat Roof?

A flat roof is a roofing system with a low slope ranging from ¼:12 to 3:12. Flat roofs are nothing new, although they offer a uniquely modern appeal. There are three main types of flat roofs for commercial and residential properties. These three roofing systems can last for decades when built and maintained properly.

What Are The Different Types Of Flat Roofs

These are not the only types of flat roof installations available, but they are some of the most common.

Built-up Roof (BUR)

Bur is the classic hot tar and gravel roofing method. This roofing system is built from three or more layers of waterproof materials, which are alternated by hot tar. The roof is then covered with a smooth river of stones.

Modified Bitumen Roofing

The modified bitumen roofing system is similar to the BUR. It is made up of composed asphalt rolls which are laid on each other to form two piles or layers(a base sheet and a cap sheet). This roofing system can be installed in four basic ways, namely:

1)     Hot applied with hot tar

2)     Torched down with open flames, so the sheets melt together.

3)     Cold is applied where a solvent is used to bond the sheets, and no heat is needed.

4)     Use a stick base and cap sheet with self-adherence that allows the sheets to stick together once the release tape is removed.

EPDM Rubber Roof

Rubber flat roofs are easy to identify and are installed in one of two ways.

1)     By weighing down large river stones.

2)     Glue with adherent

Rubber roofs are usually black and stretched lightly over insulation or fiberboard. In contrast, rubber roofs that are blasted are held in place by ballast or by placing large stones on top of the roofing sheets. The rocks used here are larger than the gravel we use in BUR, and they aren't stuck to the roof.


Spray Polyurethane Foam Roof

The process of applying a foam roof begins with creating a layer of high-density polyurethane sprayed onto the roof of a building. Once the foam sets, it is coated with some waterproofing electromeric topcoat, which appears gray or white.

Thermoplastic membranes PVC or TPO

Thermoplastic roofing membranes are a single layer of material that is either adhered to or mechanically attached to screws and plates. PVC and TPO roofs can be difficult to distinguish from a distance, but when observed closely, the color difference becomes more obvious.

Advantages of Installing a Flat Roof in Commercial and Residential Buildings


Roofing can become quite expensive, but with a flat roof, you get to spend significantly less. The materials used are cheaper as there is less "curb appeal," and there is also a lower risk for injuries which makes its labor cheap. These roofs are easier and quicker to install and will require minimal maintenance or repairs throughout their lifecycle.

Extra Space

With a flat roof, you get more usable outdoor space. You can climb on the roof to relax, play your favorite songs, host a party or plant a garden. There are many ways you can utilize the space on your roof.

Faster Installation Process:

A flat roof system takes less time to complete. Since its being done on a plain surface, it requires fewer materials and equipment. Unlike pitched roofing systems that are plagued with setbacks and interruptions in installation.

Disadvantages of Installing a Flat Roof in Commercial and Residential Buildings

Drainage problems

The most obvious challenge with a flat roofing system is how to get water off the roof. Pitched roofs drain water easily, but flat roofs can develop pools of water if not drained properly.

Do you need a local roofer? Contact us today and we will be happy to give you a free quote.

What We Offer

Complete Reroofing

We will use our state-of-the-art roof buggy to ensure no particles from roofing debris fall to the floor. We will then check for any rotted plywood and replace accordingly. We will install all materials needed to ensure your job is done once and done right.

Layer Over

We will check your roof before installing a layer over the existing to ensure it is done properly. We will install a layer of shingles of your choice.

Roof Repairs

We will get to the bottom of your leaks and repair your roof to ensure no further damages will arise and let you know if the repair will fix your problems.

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