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Weatherization
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For Your Home
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Rigid Insulation
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Flat roofs are typically replaced every 15 to 20 years. The time of
replacement represents a unique opportunity to increase the R-value of the roof by adding
rigid insulation under the new roof membrane. Rigid insulation is made from fibrous
materials or plastic foams and is pressed or extruded into board-like forms and molded
pipe-coverings. These provide thermal and acoustical insulation, strength with low weight,
and coverage with few heat loss paths. Such boards may be faced with a reflective foil
that reduces heat flow when next to an air space. If the roof is being replaced anyway,
the incremental cost of adding insulation is relatively small. An upgrade on roof
insulation can save anywhere from 5% to 20% of heating costs. Obtain cost estimates from
several contractors for the roof work, including insulation R-value, type, thickness, and
installation procedure.If you decide to install rigid insulation yourself, follow the
manufacturer’s instructions. Take these necessary precautions: wear protective
clothing; do not pack insulation around electrical fixtures or heat producing equipment;
and do not obstruct air-handling vents.
If you are considering upgrading your Insulation check out PSE’s Contractor Referral Service and get connected with a pre-screened, independent Insulation contractor. These contractors provide a free, no-obligation bid.
Email Us for more energy efficiency information or to speak with a Personal Energy Advisor call, 1-800-562-1482.
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