top of page

BUR Tar and Gravel Roof Repairs in Calgary

Built-up roof systems or BUR are commonly used in Calgary for commercial and bigger residential properties as it offers excellent weatherproofing and fire resistance. The high waterproofing and thermal resistance properties of the built-up roofing system (BUR roofing) can be attributed to its multiple layers. If you are a commercial building owner or local home-owner in Calgary and require tar and gravel roof repair book a free consultation today.


Flat Roofing Ltd offers built-up roofing systems in Alberta for low-slope and flat roofing membranes. The built-up roofing system is also referred to as tar-and-gravel roofing and is usually applied in three and four-ply thicknesses. This makes it different from other types of low-slope roofing systems that utilize single-ply membranes. The gravel used in the built-up roofing system secures the roofing material and helps in protecting the underlying layer of roofing materials. It also helps in extending the life of your roof by preventing cracking. If you’re facing issues with your existing BUR flat roof, call us for BUR tar and gravel roof repair services in Calgary. We can quickly locate leaks and provide reliable, warranty-backed repair services.

a view of gravel roof for multistory buildings

Benefits of BUR Roofing

The built-up roofing system is made of alternating layers of asphalt and reinforcing materials which lend a smooth finish to the roof surface. As these roofs offer water resistance and high tensile strength, they are considered ideal for commercial and industrial roofing. It is due to these features that these roofs can also withstand harsh Canadian winters. A BUR tar-and-gravel roof keeps heat away from the underlying roof structure and provides UV protection. The gravel offers a good grip for foot traffic for maintenance or repairs and also prevents debris from flowing towards and clogging the drains.

Repairs for BUR Tar and Gravel Roofs

Do you see exposed inner layers, have leaks, or are bothered by improperly sealed old roofing constructions on your roof? Flat Roofing Ltd can restore your tar and gravel roof with expert BUR roof repair services in Calgary and the surrounding area. Our roof repair team specializes in addressing a wide range of roof issues, including bald spots due to loss of gravel in some areas, improper installation, unsealed flashing and leaks.


Our team can conduct a comprehensive inspection to locate leaks and detect issues on the materials of a tar and gravel roof. From there, we can repair the damaged roof layers and membrane with new material or replace the entire roof if necessary. Schedule a roof inspection today for professional BUR tar and gravel roof repairs for your Calgary property.

Gravel on a Ballast Roof System

A different type of gravel, called ballast gravel, is used for single-ply roofing systems. The primary reason to use ballast in single-ply roofing systems is to weigh down the roofing materials. Roofers also use ballast gravel as it offers protective benefits like other BUR roofs.


Since single-ply roofing materials are not self-adhered, they need a material to secure the waterproofing membrane to the roofing materials underneath. Thus, ballast is used in such cases for weight to make the roof resistant to strong winds. Ballast is not like BUR protective gravel. The ballast stones are usually one to two inches thick to provide substantial protection against wind gusts.


You must be wondering why ballast is used if it offers similar results as BUR gravel. The answer is that the ballast system costs much less than the BUR tar and gravel system. It also requires less application time. It is a great choice for commercial buildings.


At Flat Roofing Ltd, our licensed staff are dedicated to providing you with the highest quality roofing services available in Alberta. Our experts provide cost-effective professional repairs and service backed by our 5-year warranty. Contact us today for all your commercial and residential flat roofing repair and installation needs in Calgary and throughout Alberta.

Roofing contractor icon

Licenced & Insured Roofing Contractors

Our roofing repair, maintenance and construction services are insured and we offer warranties on our roofing services.

bottom of page