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Whole-Building Design Strategies - Building Science Principles


Solution Center Guides


Information guide providing background information about air flow in residential buildings.

Information guide providing background information about heat flow in residential buildings.

Information guide providing background information about moisture flow in residential buildings.

Information guide describing how to calculate ventilation area in existing roofs.

Vapor retarders can be a crucial part of the building envelope and can help manage moisture issues to keep the home dry. However, before installing a vapor retarder, installers must be aware that in some instances vapor retarders can increase the likelihood of condensation issues.

Guide describing how to conduct combustion appliance zone testing.

Guide describing how to conduct a home performance assessment before beginning retrofit projects in existing homes.

This guide describes RESNET Grade 1 level installation of insulation in walls, attics, and floors.

Information guide describing how to assess attics, ceilings and roofs before proceeding with upgrades in existing homes.

Information guide describing how to assess crawlspaces and basements before proceeding with upgrades in existing homes.

This guide can help you assess an existing Heating, Ventilation and Air Conditioning (HVAC) system for potential intervention such as repair, upgrade or expansion, or replacement.


Information guide describing pre-retrofit actions to take to assess for asbestos, volatile organic comounds (VOCs) soil gasses including radon and lead.

Information guide describing how to perform a thorough visual evaluation of walls, windows and doors before proceeding with renovation projects.