DBM Roofing offers customers in Georgia Modified Bitumen roofing that is closely related to built-up roofing systems in that materials are layered on top of each other for combination high-performance protection. Originating in Europe in the 1960’s and adopted in North America by the 1970’s, modified bitumen roofing systems have been around long enough to prove themselves as cost effective for flat roof or low slope roofing systems options.
When our team here in Georgia installs a modified bitumen roofing system, layers of materials are applied: insulation, modified plies, modified bitumen membranes, adhesive and lastly, surfacing.
Modified bitumen roofing is a type of flat roofing system composed of asphalt or bitumen modified with polymers to enhance its properties. It’s applied in multiple layers, creating a durable and watertight membrane. The key advantages of modified bitumen roofing include:
Durability: When properly installed and maintained, modified bitumen roofs can last for 15 to 20 years or even longer. They are resistant to punctures, tears, and weathering.
Waterproofing: The multiple layers of modified bitumen create a robust barrier against water infiltration, protecting your building’s interior.
Flexibility: Modified bitumen membranes are flexible, allowing them to accommodate slight roof movement caused by temperature changes.
Cost-Effective: Compared to other commercial roofing options, modified bitumen is generally more affordable.
Versatility: It can be installed using various methods, including torch-applied, self-adhered, or mechanically attached, making it suitable for different roof conditions.
Savannah’s climate, characterized by hot and humid summers, presents specific challenges for roofing systems. Modified bitumen roofing offers several advantages in this environment:
Heat Resistance: The modified bitumen composition helps to withstand high temperatures, preventing premature aging and membrane failure.
Moisture Resistance: The multiple layers and waterproofing properties of modified bitumen provide excellent protection against moisture penetration, a common issue in humid climates.
Durability: The combination of heat resistance and moisture resistance contributes to the overall durability of the roofing system.
Base Sheet: A base layer is applied to the roof deck to provide a smooth and even surface.
Modified Bitumen Membrane: Multiple layers of modified bitumen are applied, either torch-applied, self-adhered, or mechanically attached.
Protective Cover: A granular or smooth surfacing is applied to protect the membrane from UV rays and physical damage.
Regular maintenance is essential to prolong the life of your modified bitumen roof. This includes inspecting for damage, cleaning debris, and addressing any issues promptly.
There are different types of modified bitumen roofing systems available, each with its own characteristics:
Torch-Applied: This method involves heating the bitumen with a torch to create a strong bond with the roof deck. It’s known for its durability but requires skilled labor.
Self-Adhered: This system uses an adhesive backing on the membrane, making it easier to install. It’s a good option for re-roofing projects.
Mechanically Attached: This system involves fastening the membrane to the roof deck using fasteners. It’s often used in areas with high wind loads.
The best choice for your commercial building will depend on factors such as roof condition, budget, and local climate.
