Existing 2×4 wall with 1x sheathing // (2) 3/4″ layers rigid insulation // taped

Existing band joist insulation retrofit with spray foam

Existing band joist insulation retrofit with 1 1/2″ rigid insulation

Bathtub installation retrofit

Existing cantilever floor // 1″ rigid insulation retrofit

Wall section retrofit // interior perimeter drain // radon vent // 1″ rigid interior insulation

Mechanically fastened subfloor over 1″ rigid insulation

Blog Review: MinnePHit House

A Minnesota family aims for higher comfort levels and lower energy bills by way of a deep energy retrofit

Building Plans for Energy Efficient Basement Remodeling

How to Finish a Basement for Energy Efficiency and Comfort: Details for a basement that insulates against water, weather, and radon gas. There are 23 construction drawings in this basement…

7 Steps to an Energy-Efficient House: 1. The Basement

Insulate and air seal the basement or crawl space to bring it inside the thermal envelope