Most homeowners focus on attic insulation and miss the walls entirely, leaving a major source of heat loss and gain untreated. Exterior foam board insulation wraps your entire home in a continuous thermal barrier, cutting energy bills by 15 to 25% and eliminating the hidden comfort problems that interior insulation alone cannot fix.
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Older homes with plaster walls are notoriously drafty and energy-hungry, but tearing out walls to add insulation is expensive and destructive. There are proven methods to dramatically improve your home’s thermal performance without touching a single inch of original plaster.
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Wall insulation does not last forever. Fiberglass batts sag, cellulose settles, and foam degrades, quietly driving up your energy bills year after year without a single visible sign inside your home.
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Cold walls, sky-high heating bills, and drafty rooms are not just annoyances – they are symptoms of heat escaping through under-insulated or leaky walls. Learn how to spot the signs, confirm the problem, and fix it before winter drains your wallet.
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Thermal bridging silently drains energy through your walls, floor joists, and window frames even when insulation looks perfect. Understanding where it happens and how to stop it can cut heating and cooling losses by 20 to 30 percent in affected areas.
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