What is a 4-Ply roofing system? (B.U.R) roof membranes (Tar and Gravel)

A 4-Ply roofing system involves roofing felts that are typically four plies composed of layers of reinforcement such as fiberglass or polyester felts, with each ply being embedded in a full bed of hot asphalt/bitumen. The bitumen provides the adhesive and waterproofing membrane while the felts provide the membrane reinforcement and the surfacing. The roofing membrane is fully adhered to the underlayment, which typically consists of a vapour barrier, Poly ISO insulation and/or Fiberboard insulation, and four layers of perforated felt #15 and asphalt laminated together. Finally, the gravel ballast protects the bitumen from deteriorating influences of the ultra-violet light caused by the sun, and erosion due to wind, snow, hail and rain.

Why is the best choice system for your roof?

This is the more economical, time tested option and is relatively maintenance free (if installed correctly) for up to 15 years, and is easy to repair. With an estimated life span of up to 30 years with proper scheduled maintenance, this roof is durable and can cope with our harsh winter climate and has been the industry standard in Canada since the early 1900’s.

Key Features

  • Resistant to moisture
  • Resistant to punctures and tears
  • Impact resistant
  • Durable and viscoelastic
  • Resistant to weathering

What is the average price for a 4-ply roofing system?

To offer you a fare competitive price, Gentech recommends a site visit to go over the following items; area size, location of leaks, type of insulation, accessibility, time of year, type of roof system, how many stories. This is one of the many reasons why it is beneficial to both parties to have an on-site meeting. Call us today at 1-905-270-6799 for your FREE and informative estimate to further discuss options and details.

Other Services

See All Services

2-Ply Modified Bitumen

Modified SBS bituminous systems combine the advantages of built-up roofing with a single-ply system. This system has the benefits of BUR, along with added strength, flexibility and excellent weather resistance. [...]

+ View Details

Single-Ply  TPO/PVC/EPDM

TPO, EPDM, and PVC are the three most common types of single-ply membrane systems. This is by far the most common synthetic rubber roofing option, and has been used since the early 1970’s. [...]

+ View Details

Re-Roofing / Roof Replacement

Roof replacement is appropriate for roofs that can no longer be repaired. A roof lifespan is approximately 20 years if well-built and maintained. Replacement is usually the last option when it is no longer economical to service the roof. [...]

+ View Details

Emergency Service / Maintenance

When you have water pouring in on your production line or streaming in over your inventory, leave it to the professionals at Gentech to stop the leak, so you can get back to what’s important. [...]

+ View Details

Inspection Services / Roof Reports

A leaking roof can have serious consequences if left unattended. We provide a complete inspection service to allow owners and managers to become more familiar with their roofing systems, enabling them to make intelligent decisions at budget time. [...]

+ View Details

Aerial Drone Inspections

Get a detailed inspection of your roof with our new drone technology. Our estimators can easily determine the condition of your roof with our 4K HD quality Drone camera system. [...]

+ View Details

Infrared Thermal Scans

Infrared real time imaging is a proven method for identifying and defining moisture problems in a flat roof. [...]

+ View Details

Related Projects

See All Projects