Energy Efficient Options for a Flat Roof

Energy efficient roofing is available in a material that will fit any home. As with traditional roofing materials, your final choice of the right new roof for your home will depend, to a large extent, on where you live, the architectural style of your home, and local preferences.  Most discussions of residential roofing options, however, tend to focus on the materials most commonly used on pitched roof styles. If you have a flat roof, your needs are somewhat different.  There are highly energy efficient options for a flat roof for you to consider. 

Flat roofs are very popular in the San Francisco Bay Area and in the desert Southwest. Certain architectural styles used in the Deep South also incorporate flat roofs or parts of roofs.  Low-pitched roofs can often use the same energy efficient materials very effectively.

Flat roofs present several challenges:

• Much more difficult to install
• Very difficult to maintain
• Few long-lasting solutions available
• Persistent drainage problems
• Inadequate insulation

There are energy efficient roofing materials for flat and low-pitched roofs that offer most of the same benefits as other materials for steeply pitched roofs.  Some of these materials are commonly used on commercial buildings very effectively.  Like other homeowners throughout the USA, you might be thinking about replacing your roof while you can take advantage of Federal tax credits and other available incentives.

New energy-efficient roofing systems promise reduced cooling costs, longer roof life with less maintenance, better wind resistance (up to 110 mph), better seals and less likelihood of leaks and penetration by wind-driven water, and better insulation to prevent heat exchange. 

The energy efficient roofing systems recommended for flat and low-pitched roofs are foam sprays and membranes. There are three main types of materials options for the flat roof.

Spray Roofing – Seamless Spray Roofing Membrane or Sprayed Polyurethane Foam (SPF).  Two liquids are mixed at the spray nozzle and release a chemical reaction that causes the foam to expand twenty or thirty times, forming a solid, unbroken roof system that adheres across the entire roof. These spray roofing materials provide outstanding water resistance and thermal insulating properties.  They can be as much as 500 times more energy-efficient than the traditional tar and gravel.  Because the sprays will adhere to almost anything, it is not necessary to remove the old roofing materials. The foam is then treated with a protective “elastomeric” coating. In other words, the coating protects the foam and stretches with it in heat or cold. It has been shown to reduce energy costs by as much as 58% and in some places can pay for itself in as little as four and one-half years. If cleaned, primed and recoated properly every ten to fifteen years, the spray roofing can last 50 years or move.

Thermoplastic Olefin or Polyolefin (TPO).  This material creates a single-ply roof membrane. It is made of ethylene propylene rubber, providing great durability with good flexibility to respond to building movement. It is ozone and algae resistant and resistant to punctures and tears from impacts. Seams are welded in a way that allows manufacturers to claim that they are almost a single piece. The membrane is attached around the perimeter and at all penetrations and then held in place with ballast.

Ethylene Propylene Diene Monomer (EPDM).  This single-ply membrane has been used in the U.S. since the 1960s. It is a very common roofing material for flat roofs because it is less expensive than some of the other options and relatively easy to install. EPDM is a rubber material, which makes it flexible enough to handle building movement. It can be installed in three ways, depending upon the local weather (particularly wind). It can be fully adhered across the entire roof, mechanically fastened to the substrate, or loose-laid and covered with a ballast (often river rock) to hold it in place. The seams are sealed using special splicing tapes.

Three primary material options are available to homeowners with flat or low-pitched roofs.  All of these systems offer energy efficient options for homes with a flat roof.  Several companies make the materials and the sealants that must be applied regularly.  Talk with your roofing contractor about the best option for a flat roof in your region. 

Copyright 2009 by ABCD Publishing

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www.chipsroofingllc.com Roofing Contractor and Siding Contractor In Boulder Broomfield CO Chips Roofing And Siding Sky Light Shingles Metal Flat Roof Repairs New Commercial Residential Hail Damage Wind Replacement (720) 938-7663 Chips Roofing & Siding LLC is a Roofing & Siding Contractor servicing Boulder & Broomfield, CO and the surrounding areas. We Specialize In High Wind Areas, Hail Damage And Dealing With Insurance Companies. Our Services Include: Shingles Metal Roofs Flat Decks Tile … Please help to answer the question about flat roof contractorWhat do I need to watch out for when hiring a roofing contractor?
We have a flat roof that has several leaks.
So far, only one contractor has been here for an estimate. The other two just quoted me prices based on each leak. A fourth contractor quoted me his hourly rate, and said they don't come out to do estimates. When they come out, they just fix the leaks.

Also, none of the contractors are giving any kind of warranty/guarantee about the repair?

In addition to checking their license and asking for references, what else do I need to watch out for? I thought I was being diligent, asking for several contractors, but I didn't expect them to not even come out to do estimate.
About Author

Dan Fritschen, Publisher at ABCD Publishing, is a consultant to both individuals and businesses who are trying to decide whether to remodel or move. ABCD publishing currently owns two helpful websites, www.remodelormove.com and www.remodelestimates.com.