HVAC systems are widely used to carefully heat and cool homes, but even the most energy efficient systems can largely go to waste without appropriate exterior wall insulation and ceiling insulation.

We all know insulation is important to having a comfortable and energy-efficient home. Check out these 24 things to consider ...

For example, the roof is built around an aluminum frame stuffed with batten insulation and a vapor barrier, some bead foam, panels, and vinyl overlay, not to mention the DiFlex II outer layer ...

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