Roof Replacement and
Roof Repair Specialist(703) 475-2446
January 22, 2012 by - 0 Comments
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Dealing with a rigid flat roof insulation conundrum? Well, flat roofs, in general, have given both roofers and homeowners a run for their money. Not only are they difficult to maintain, understanding the ins and outs of flat roofs is must, especially when dealing with rigid insulation.
Rigid insulation is the material used to provide thermal resistance to a roof. Thermal resistance helps to improve the energy efficiency of a home by keeping cold and hot air from leaking through the roof. Although installation may be a DYI undertaking, determining what type of insulation and method to use is best left to the expertise of a roofer specializing in energy efficiency.
Ideally, insulation should be installed during a new roof build or roof replacement. However, if dealing with an existing roof, rigid flat roof insulation works best when applied between ceiling rafters. Either spray foam insulation or dense pack cellulose do a good job forming to the space to create an air tight barrier. Another possible method is insulating the exterior of the roof surface. Although more commonly seen on commercial buildings, this method involves adhering foam board to the roof decking and sealing with a water membrane.
Some homeowners of flat roofs make the mistake of installing insulation directly into the ceiling. This is not recommended, as there are specific building codes that apply. One of which may include dropping the ceiling to avoid being fire hazard.
The key to a flat roof achieving maximum thermal resistance is choosing the appropriate rigid insulation. Working hand-in-hand with a professional can make the decision less daunting and more importantly, successful. Rigid flat roof insulation can either break or make a roof's performance greatly affecting not only energy efficiency, but a home's overall comfort.
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