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Roll Out The Modified Bitumen

Just about any kind of roof can be replaced with a cool roof, and some can be converted to cool roofs with the addition of special coatings or surface materials. In some municipalities, cool roofs are already required for all new commercial construction. Cool roof requirements are based on the roof’s slope, with more stringent requirements for low-sloped roofs, which rise less than 2 feet (0.6 meters )in height for every 12 horizontal feet ( 3.7 meters), than for steep-sloped roofs, which rise more than 2 feet (0.6 meters )in height every 12 horizontal feet ( 3.7 meters) [source: Department of Energy].

To determine which roofing materials are best for your building, first you must determine the slope of your roof, then select the cool roof product that best suits your slope, budget, and architectural style.

One of the most common cool roof options for a flat or low-sloped roof is a modified bitumen roof. Modified bitumen roofing is a membrane made up of sheets of plasticized or rubberized asphalt held together with rolled reinforcing fabric and fastened to the roof deck with hot asphalt or cool adhesive. Traditional modified bitumen roofs are black or gray, with a low solar reflectance, meaning that they absorb, rather than reflect, most of the sun’s light. But simply applying a white coating over the surface of the material at the factory can raise the solar reflectance to acceptable cool roof standards.

 

 

 

 

 

 

 

 

What is a Low-Slope/Flat Roof System?

A roof that is nearly flat or slightly pitched is called a flat roof or low slope roof – No roof should be dead flat because it must have at least a slight slope to drain.

Low-slope & steep-slope terms describe roof slope, the slant of a roof.

  • A low-slope roof is one that has a slope of less than 3-in-12.
  • This means that for every horizontal foot, the roof level goes up less than 3 inches vertically.

A steep-slope roof (typically a shingle roof) depends upon gravity to cause water to flow in one general direction so it can “shed” the water over the breaks & fasteners in the shingles until it flows to the edge.  A low-sloped roof or flat roof can’t depend upon the water to flow in any particular direction so it must form a watertight, monolithic membrane that stays watertight all the way to the drains or edge.

Modern low-slope roof or flat roofs tend to use a continuous membrane covering which can better resist pools of standing water.  These membranes are applied as continuous sheets, bonded together with heat-welding or adhesives.  A more expensive low-slope or flat roof option  include sealed metal roofs using copper or tin. These are soldered interlocking systems of metal panels.

Traditionally, low-slope or flat roofs would use a built-up (“tar and gravel”) roof, but today this traditional type of roofing suffers from performance, cost & environmental concerns requiring better value solutions.

Besides performance in wind, freeze-thaw cycles & UV radiation from the sun, a low-slope/flat roof must also withstand expansion & contraction & remain 100% watertight.  This requires well-engineered attachment, seaming & weathering characteristics to meet these performance demands.

Types of Low Slope/Flat Roof Systems

Built-Up Roof

  • Multiple layers of roofing felt (often called “tar paper”) are mopped in place with hot asphalt or coal-tar pitch (bitumen) to “build up” a strong watertight membrane.
  • Membrane is then surfaced with a coating or gravel imbedded in a pour-coat of more hot bitumen.
  • This type of roof has a long history of performance.
  • This roof system is not known as a flexible membrane, may have some environmental concerns & at times cost-prohibitive due to crude oil prices.

 

 

 

 

 

 

 

Modified Bitumen

  • Asphalt is chemically modified to allow flexibility & constructed over a heavy polyester or fiberglass mat for strength.
  • Proven track record of performance
  • Superior waterproofing characteristics
  • Broad range of application methods
  • Wide choice of top-surfacing, including “Cool Roofing” options
  • With insulation, provides an even better-performing building component
  • High tensile-strength
  • Available as part of a fire, wind, and/or hail rated roofing system
  • Competitive life-cycle cost
  • Long-term warranties are available with many MB systems

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Single Ply

  • Entire membrane roofs are manufactured in factory-controlled conditions that can then be installed as a single ply.
  • Thermoplastic membrane roofs are heat welded single-ply membranes.
  • Usually white which makes them very heat-reflective and highly-scored Energy Star products.
  • Roof seams are very durable since they are welded together.
  • These roofs are generally more environmentally friendly in their manufacture, transportation, installation, performance & disposal.
  • Thermoplastics are the fastest growing type of low-sloped roofing.
  • Proven track record of performance
  • Broad range of application methods
  • Available as part of a “Class A” fire-rated roofing system
  • With insulation, provides an even better-performing building component
  • Wide choice of top-coatings, including “Cool Roofing” options
  • Superior waterproofing characteristics
  • High tensile-strength
  • Competitive life-cycle cost

 

 

 

 

 

 

 

 

 

 

 

 

 

No matter what the problem is with your low-slope roof or flat roof, Best Roofing  will give you good advice on the best solution for your roofing needs.

 

Boca Commerce Center Receives New Roof After Hurricane

Many office buildings around South Florida have outdated and often hazardous roofing systems. Best Roofing believes that an office building should be able to weather tough conditions and protect a company’s employees and valuable assets. This is particularly true for South Florida, as hurricane season lasts for five months and businesses need a roof they can rely on.

The Boca Commerce Center called on Best Roofing to provide them with a brand new roofing system. The project took place after a hurricane caused more damage to the existing roof.

 

This presented a special challenge of collecting the proper materials for the project, as supplies needed were scarce. Best Roofing met the challenge, installing a Modified Bitumen roofing system in 45 days over 65,000 square feet. The system has a 20-year warranty, and the clients could not have been more satisfied. Best Roofing’s goal is to provide superior customer service as well as quality workmanship. One of the office building employees responded, “I would like to take this opportunity to thank you for the professionalism your entire staff exhibited over the past several months. Gregg, to your credit you have obviously made some excellent choices in hiring your staff both inside and out.”

Best Roofing has been installing roofs in every city in the tri-county area for more than 30 years, building a reputation of excellence with customers. Best Roofing is a one-stop shop, and can cater to all of your roofing needs, from roof repair or maintenance to complete new roof installation.

Nirvana Condominiums Multi-Roof Project a Success

South Florida, Miami in particular, is home to an eclectic mixture of building styles, both aesthetically pleasing and architecturally complex. These types of structures, especially older condominium buildings, can prove to be a challenge when repairing or replacing a roof. Nirvana Condominiums is located in a coveted waterfront Miami location, overlooking the Biscayne Bay. With lush gardens and courtyards, Nirvana consists of five individual condominium buildings that range in size, with separate roofs and deck tops. This landscape presented unique challenges, as there was some difficulty accessing the roof and replacing the decks. Since Best Roofing specializes in hotel and multi-family buildings, the management from Nirvana Condominiums contracted our professionals. The project was a success and the skilled roofers installed a Modified Bitumen Roofing System, as well as a Metal Roofing System within 90 days. The project covered 83,000 square feet and has a 20-year warranty.

 

Buildings of this nature can be very challenging to work with, and Best Roofing prides itself on providing premium quality roof systems that are backed by their knowledgeable team. Proper management is equally essential, as it is the key element in ensuring the satisfaction of any residential community.

Best Roofing has successfully provided many South Florida businesses with all of their roofing needs. Equipped with a 24-hour emergency response team, Best Roofing can handle any situation their customers may encounter. Whether it’s roof repair, restoration or installment, Best Roofing offers outstanding services to meet the needs of any roofing project and extend the life and integrity of a building. Contact our experts today at 1-888-723-BEST.

Unity Health and Rehab Received Roof Restoration

Unity Health and Rehabilitation Center has been providing South Florida with an extensive range of care for over four decades. Serving a diverse community like South Florida, Unity believes in “person-centered care,” emphasizing the physical as well as emotional needs of the individual. Unity offers skilled nursing and rehab services, often receiving complex cases from Jackson Memorial Hospital, UM Hospital and Miami VA. Due to the delicate nature of the services Unity offers, Best Roofing implemented special measures to ensure patients would not be disturbed by loud noises or other bothersome elements of construction.

Best Roofing installed a modified bitumen roofing system covering 21,000 square feet. Construction lasted 60 days and came with a 10-year warranty. When working on any project, it is essential that the construction process is as clean and discreet as possible; with a healthcare facility such as Unity, this is especially important as to not compromise the patient’s comfort or recovery process. These aspects of service are fundamental to Best Roofing in order to build and maintain their reputation in South Florida. Unity Health and Rehab is now enjoying their new roof and can continue to provide their patients with quality care.

Best Roofing has supplied the tri-county area with commercial roofing services since 1978. Whether its roof maintenance or a complete new roof installation, Best Roofing can guarantee a secure roof system and provide a reliable warranty. Every project is a new challenge and the experts at Best Roofing deliver the most comprehensive services in the area. If you have questions or concerns about your roofing needs, please contact Best Roofing today at 1-888-723-BEST.

Copyright 2011, Best Roofing, Inc.