Building Envelope

Lower utility bills by using high efficiency windows and insulation. More resources for this category are located on the Green Built Homes Certification Levels page — under Phase 3: Building Envelope as well as our Building Envelope Blog category page:


Installing Insulation – Advanced energy technical tips and photos.

Insulating Double Walls – Technical tips and photos.

Insulating Dropped Ceilings – Technical tips and photos.

Pinched Batts – Technical tips and photos.

Wall Insulation – Properly sealed, moisture-protected, and insulated walls help increase comfort, reduce noise, and save on energy costs.

Weather-Resistive Barriers – How to select and install house wrap and other types of weather-resistive barriers.

North American Insulation Manufacturers Association – NAIMA is a trade association of North American manufacturers of fiberglass, rock wool, and slag wool insulation products.

Chart of Insulation R-Values

Residential Energy Services Network – The Home Energy Rating System (HERS) Index is the industry standard by which a home’s energy efficiency is measured. It’s also the nationally recognized system for inspecting and calculating a home’s energy performance.


Efficient Windows Collaborative – Provides unbiased information on the benefits of energy-efficient windows, descriptions of how they work, and recommendations for their selection and use.