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Insulation in Westbrook: July highs average about 80°F; January lows average about 11°F.
In Cumberland County, July highs average about 80°F and January lows about 11°F, with roughly 49 inches of rain a year. Long, cold winters put furnaces and pipes to the test.
Over the last 10 years the National Weather Service recorded damaging thunderstorm winds, flash floods and floods in Cumberland County, with hail up to 1.5 inches across. After a storm, a quick roof and gutter check catches damage before it turns into a leak.
Cumberland County has had 20 federal disaster declarations in the last 25 years, most often for severe storms; the latest was Severe Winter Storm (2024).
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Uneven rooms, high bills and an attic you can see the joists in are the signs; older homes often have far too little.
Attic insulation and air-sealing usually pay back fastest.
These are Cumberland County figures — more about homes in Portland.
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