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Somerset County Roofers: Article About Roof Insulation

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Due to a roof's large surface area and the necessary openings for ventilation, homes tend to lose the greatest amount of heated and conditioned air through their attics. While most newer homes are built to be air tight, houses that are a few decades old or older often have many gaps and places where unwanted air exchange can occur. When combined with insufficient insulation, up to 30 percent of a home's warmed or cooled air could be lost through attic leaks. Somerset County roofers can insulate a home's rafters and eaves to stop this energy wastage and create a more comfortable living environment.

Attics with insufficient rafter insulation can be augmented by placing additional insulation over top of the current layers. The easiest way to do this is with fiberglass rolls. Fiberglass is inexpensive and easy way for roofers to trim and fit around rafter protrusions like vents, pipes and air ducts. However, fiberglass also has low R values and requires the use of protective equipment such as face masks, goggles and long gloves to avoid exposure to airborne fibers. Fiberglass can also be challenging to install on attics with tall or steeply sloped peaks.

For easier insulation projects, roofers often select sprayed foam. Open celled foams are affordable and simple to install with the use of professional grade sprayers.

The roofing contractors from Peter W Smith Construction of Somerset County would be happy to answer any question you have about residential roofing or commercial roofing.

Because most attic floors cannot support the weight of the spraying equipment, the blowers will be positioned on the level of the home just below the attic. Long hoses can be brought up through the attic's access door. A trigger handle allows the roofers to control the rate and direction of the foamed insulation. Open cell insulation is lightweight and expands to fill every nook and cranny. The open celled foaming insulation has R values of 6 to 8. No additional vapor barriers are required with foam insulation, although for added protection, roofers may install polyurethane sheeting after the foam has cured.

Closed cell foam is another excellent choice for insulating around rafters. The long nozzles on the spraying devices allows roofers to reach the difficult spaces, steep angles and tight crevices where air can leak into and out of an attic. The foam has an R value of 8 to 10, meaning only 3 to 4 inches of it are needed in order to achieve the U.S. Department of Energy's recommended R value for New Jersey. Once the foam is in place, it also acts as a water and vapor barrier, protecting the attic from moisture intrusion and condensation.

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