Polyurethane Foam Roofing
Whether you are currently planning new construction or re-roofing an existing roof, Spray Polyurethane Foam Roofing is for you. This is because it lends itself well to all types of roofing situations, from traditional flat roofs to unusual designs. Foam roofing systems can be applied rapidly, with little or no disruption to the facilities. In most re-roofing situations there is not even a need to remove the existing roof.
Spray Polyurethane Foam has been used as a roofing and insulation material for over 40 years. At one time it was considered to just be an alternative to built-up roofing; foam roofing now protects a wide range of buildings. During this time, foam roofing systems have proven themselves through comprehensive, independent studies to be dependable, long lasting, and very affordable. Today there are foam roofs that have been in place for over 4 decades, and by all appearances they should be able to last indefinitely as long as they are properly maintained.
Replacing an Existing Roofing System
Because of its light weight, Sprayed Polyurethane Foam Roofing can be applied over already existing roof installations. It can be applied directly over asphalt, shingles, built-up roofs, clay tile, concrete, metal, and wood. This saves the need for tear-off, reducing the amount of time, disruption to the business, even the debris in landfills. The roof has to be properly prepared by cleaning off any loose debris and aggregate, and by making sure that it is completely free of moisture.
Spray Foam roofs typically support a 20% to 70% energy cost savings, which can repay the entire cost of the new roof in as little as 4 years. The local and state governments also have rebates available from time to time. Another great savings comes at the end of ten years when you do not have to re-roof your building again, as you would with most other roofing systems SPF roofing has been used as commercial, industrial and residential roofing material since the late 60’s. Most of the roofs that were installed since that time are still in good condition, if basic care was taken.
We don’t know exactly how long a SPF roof will last, the 30+ year old roofs that are still in great condition all over the country can give us a good indication. That is a large difference from the 8-12 years for a cap sheet roof that you may be used to.
Energy SavingsPreparing The Roof To Be Foamed SPF roofs can be protected from ultraviolet light with coatings — typically acrylic, polyurethane, or silicone coatings — or with crushed stone aggregate. Aggregate-covered roofs, sometimes called “foam and stone,” require stone ranging in size from 1/4 inch to 3/4 inch Gravel can only be used on relatively flat roofs, and its weight may exceed structural limits. Coated foam weighs only 1/3 pound per square foot, while aggregate-covered foam is closer to 6 pounds per square foot. Coated foam makes it easier to spot and repair a roof leak. Gravel maintenance is more difficult, because you can’t see what’s under it. Gravel can stop up drains. The reflectivity values of coatings are known, coatings (unlike gravel) are eligible to receive an Energy Star label Coatings usually cost a little more than stone. Coating on an SPF roof will last anywhere from 5 to 10 years.
SPF Coating Durability and Longivity H R Foam RoofingDuring the summer, the majority of the building’s heat enters through the roof. When the SPF roofing system is applied as a thermal blanket, it insulates and shields the roof substrate from the sun’s infrared rays. The result is that the roof never heats up, and therefore the heat is not radiated inside the building. This results in lower A/C costs.
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