B.U.R. (4 Ply Roofing)

A traditional Roofing System. Built up roof is a term for a roof system that is built by adding layers. It is the oldest of the newer methods dating back to the early 1800’s.  Typical BUR systems incorporate a 4-ply application, although different variations and specifications require three to five plies with a top pour and protective surfacing. All systems use either base, #15 felt paper (organic) or Fiberglass felt (inorganic) sheets overlapped in a combination starting at the low points of the roof surface. They are installed using different waterproofing materials such as asphalt, cold application adhesive, and modified asphalt. The final step is a variety of surfacing options using gravel or mineral surface material for UV protectant.

Built Up roofing limits movement with high tensile strength. There is nothing quite like asphalt to make a roof water resistant.


  • Cost effective

  • Most popular and proven system

  • Easy to maintain and repair

  • Thicker roof membrane making it durable

  • Most durable for high traffic roofs

  • Outstanding performance throughout vast Canadian climates

  • Provides excellent waterproffing and UV protection.



Modified Bitumen

Modified Bitumen (MB) roofing is an asphalt-based, close cousin of the Built-up-Roof (BUR) designed for buildings with low-slope or “flat” roof structures. Engineered modified bitumen roofing membranes originated in Europe in the mid 1960’s and have been used successfully in the United States and Canada since approximately 1975.

Increased resistance to brittleness at cold temperatures, greater flow resistance at high temperatures, and increased elasticity can be achieved by blending synthetic rubberized polymers with asphalt in lieu of modification by the blowing process used for BUR asphalt. There are numerous surfacing options for this system which include a factory applied mineral surface, gravel surface, including “cool roof” coatings which are highly-reflective to save on building cooling costs. Mineral-surfaced MB products are typically furnished with white granules, but are also available in designer colors to match asphalt shingles or to otherwise compliment the building design.

MB gives designers and installers an even broader array of options than BUR. MB may be installed by the torch-application method, or “hot-mopped” like BUR, or applied with “cold-process” adhesives. The latest innovation with MB is the self-adhering sheet. Using special combinations of polymers to modify the underside of the MB sheet, the rolls are manufactured with a release paper. The installer removes the release paper and as the sheet is rolled out, it adheres itself to the substrate. This method eliminates the risks associated with the use of torches, hot asphalt, and is completely free of VOC (volatile organic chemicals) fumes during and after application.

Benefits of Modified Bitumen Roofing

  • Proven track record of performance

  • Superior waterproofing characteristics

  • Broad range of application methods

  • Wide choice of top-surfacing, including “Cool Roofing” options

  • High tensile-strength

  • Competitive life-cycle cost

  • Expands with building movement as needed

  • Easy to repair

  • Available with flame-free and VOC-free installation

  • Long-term warranties are available with many MB systems



We Are Specialists in Single Ply Membrane Roofing


A single-ply reflective roofing membrane made from polyprophylene and ethylene-propylene rubber polymerized together. 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
  • Lightweight
  • Easy to maintain
  • Light colored 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


PVC sheets are produced by calendaring, spread coating or extruding, and typically are reinforced with polyester or glass-fiber mats or scrim. PVC sheets contain plasticizers and stabilizers, as well as other additives to impart flexibility and achieve other desired physical properties. Some membranes are available with nonwoven fleece backing adhered to the underside of the sheet


EPDM is a versatile rubber roofing membrane that has been used in the low-slope commercial roofing industry for over a half 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