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The pitched roof reduces the extension's surface area to 12 percent less than that of a flat-roofed extension, creating a more compact building envelope—which translates to less material needed for construction and less space to heat or cool.
The pitched roof reduces the extension's surface area to 12 percent less than that of a flat-roofed extension, creating a more compact building envelope—which translates to less material needed for construction and less space to heat or cool.