It is also the only type that can be used for both interior and exterior building insulation . Foam board can be a DIY installation depending on the location within the house, but installing it ...

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.

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.

Fitting exterior walls with insulation will reduce heat loss, which in turn should help cut utility bills. Not only can that help keep a home cozy for less, but the reduction in energy consumption is ...