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.

then add new insulation from the outside, new sheathing and metal siding. A Your plan will work, but depending on the current state of exterior walls, it could also involve a lot of unnecessary work.

The following products give top-performing examples of insulation for exterior walls as boards, batts, and rolls. Our list also includes options for extruded polystyrene (XPS), fiberglass ...

“Place batt insulation on a flat surface and cut with ... Step 5: Apply vapor barrier over batting for exterior walls. If the insulation will be installed in the exterior walls of the home ...