Commercial Roofing Specialists
At Dilmar Group, we have been servicing roofs in the Toronto GTA, including Mississauga and Scarborough, for over 50 years. Commercial roofing is our specialty. Call us today for the best quality roofing for your next project.
SPECIALIZING IN THE SERVICE /INSTALLATION OF:
- Built-Up Roofing (BUR)
- Ethylene Propylene Diene Monomer (EPDM Rubber)
- Thermoplastic Polyolefin (TPO)
BUILT UP ROOFING (BUR) — 4-PLY ROOFING
Built-Up Roofing, or BUR, is roof system built by alternating layers of reinforcing fabric and bitumen. This tried-and-true method dates back to the early 1800’s, making it the oldest of the “new methods” of roofing in use today. A typical BUR system incorporates a 4-ply application, although different variations and specifications differ in ply, and incorporate a top pour with protective surfacing. This system builds on a base of either organic or inorganic reinforced fabric sheets layered in a combination that starts at the low points of the roofs surface. Different waterproofing materials such as asphalt, cold-application adhesive, and modified asphalt are used in the installation. The final layer uses a variety of surfacing options of gravel or mineral surface material for UV protection.
Built-Up Roofing limits movement and has high tensile strength. There is nothing quite like asphalt to make a roof water resistant.
BENEFITS OF COMMERCIAL ROOFING
- Cost effective
- Most popular and proven system
- Easy to maintain and repair
- Thicker roof membrane for increased durability
- Most durable for high traffic roofs
- Outstanding performance throughout vast Canadian climates
- Provides excellent waterproofing and UV protection
Modified Bitumen, or MB roofing, is an asphalt-based close cousin of the Built-Up Roof. Its design suits buildings with low-slope or “flat” roof structures. Engineered MB roofing membranes originated in Europe in the mid-1960’s, and have been used successfully in the United States and Canada since approximately 1975.
Modified Bitumen has an increased resistance to brittleness at cold temperatures, a greater flow resistance at high temperatures, and increased elasticity. This is achieved by blending synthetic rubberized polymers with asphalt, as opposed to the blowing process used for BUR asphalt. There are numerous surfacing options for this system. These include a factory applied mineral surfaces, gravel surfaces, and “cool roof” coatings, which are highly-reflective and reduce building cooling costs. Mineral-surfaced MB products are typically furnished with white granules, but are also available in designer colours to match asphalt shingles, or to otherwise complement the building design.
MB gives designers and installers an wider variety of options than BUR. MB may be installed through the torch-application method or “hot-mopped”, like BUR, or applied with “cold-process” adhesives. The latest innovation in MB application is the self-adhering sheet. This application uses special combinations of polymers to modify the underside of the MB sheet, and the rolls are manufactured with a release paper. The installer removes the release paper as the sheet is rolled out, allowing it to adhere itself to the substrate. This method eliminates the risks associated with the use of torches, hot asphalt, and is completely free of volatile organic chemical (VOC) fumes during and after application.
BENEFITS OF MODIFIED BITUMEN ROOFING
SINGLE-PLY MEMBRANE ROOFING
THERMOPLASTIC POLYOLEFIN (TPO)
Thermoplastic Polyolefin is a single-ply reflective roofing membrane made from polymerizing together polyprophylene and ethylene-propylene rubber. It is typically installed in a fully adhered or mechanically attached system, allowing the white membrane to remain exposed throughout the life of the roof.
BENEFITS OF TPO
- Easy to install
- Easy to maintain
- Light coloured roof that reflects the sun’s energy, can assist in the reduction of a building’s cooling costs
- Material is available in a variety of different sizes and thicknesses
POLYVINYL CHLORIDE (PVC)
PVC sheets are produced by calendaring, spread coating, or extruding, and are usually reinforced with polyester or glass-fibre mats or scrim. PVC sheets contain plasticizers and stabilizers, as well as other additives to achieve flexibility and other desired physical properties. Some membranes are available with non-woven fleece backing adhered to the underside of the sheet.
ETHYLENE PROPYLENE DIENE MONOMER (EPDM)
EPDM is a versatile rubber roofing membrane. It has been used in the low-slope commercial roofing industry for over half a century. EPDM offers a variety of installation options and numerous long term benefits, such as superior weatherability, exceptional wind uplift resistance, extreme flexibility and more.
BENEFITS OF EPDM
- Easy to install
- Low maintenance
- Long lasting
- Durable and flexible