Editor’s introduction: With energy prices rising again, many homeowners are planning energy-efficiency improvements to their homes. But most people are unsure of where to begin, and even seasoned builders don’t always know which priorities should rise to the top of the list. Betsy Pettit, an architect at Building Science Corporation
, recommends starting where you can get the most bang for the buck.
Step 2: To stop air leaks and reduce heat loss, seal up your home’s cap
If air leaks in at the bottom of a house, it also leaks out at the top, making the house cold and drafty in winter. A poorly insulated roof also can make a house hot in summer.
Air-sealing work should always accompany any insulation improvements. Using spray foam under a roof can eliminate the need for roof venting, which is tricky in complicated roofs. Other insulation options include cellulose on the attic floor or rigid insulation on top of the roof sheathing.
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