3.4 Insulation Building Science
Insulation reduces heat transmission by resisting the conduction, convection, and radiation of heat through the building shell. Insulation combined with an air barrier creates the thermal envelope between the conditioned indoors and outdoors.
Installing insulation is one of the most effective energy-saving measures. You can ensure insulation’s safety and effectiveness by following these guidelines.
✓ Install insulation in a way that enhances fire safety and doesn’t degrade it. See Safety Preparations for Attic Insulation.
✓ Comply with lead-safe practices when disturbing paint in pre-1978 homes. See Additional Lead-Safe Work Practices.
✓ Prevent air movement through and around the insulation with an effective air barrier. Make sure that the air barrier and insulation are aligned (next to one another) using procedures outlined starting on Attics and Roofs
✓ Protect insulation from moisture by repairing roof and siding leaks, providing site drainage, and by controlling vapor sources within the home. See Solutions for Moisture Problems.
✓ Install insulation to meet or exceed the guidelines of the International Energy Conservation Code (IECC) 2012 and the DOE’s Standardized Work Specifications.
3.4.1 Insulation Receipt or Certificate
Provide each client, receiving insulation products and services, a printed and signed receipt or certificate that includes the following information.
• Insulation type
• Coverage area
• Number of bags installed
• R-value
• Installed thickness and settled thickness
• Amount of insulation installed according to manufacturer’s specifications