Webinar addresses new code options for residential buildings
A webinar is set for Thursday to address new code options for insulating, sealing and controlling moisture in unvented attics in residential buildings.
Building America and Building Energy Codes Program stakeholders are invited to learn about this new innovative technology and new code provisions and resources from leading experts Dr. Joe Lstiburek, the founding principal of Building Science Corp., and Pam Cole, research scientist with Pacific Northwest National Laboratory.
The webinar is scheduled to begin at 1 p.m. Thursday, May 18. Click here to register.
For more than 20 years, the U.S. Department of Energy (DOE) Building America Program has been partnering with industry to bring cutting-edge housing research on energy efficiency to the residential building industry and the public.
New code language would require installation of vapor diffusion ports/vents in unvented attics to allow moisture in the attic to be removed by diffusion rather than by air change. This allows the attic assembly to remain airtight while providing a path for moving the moisture to the outside via vapor diffusion.
Airtight attics also provide an energy-efficiency benefit, according to the DOE. With the vapor diffusion ports, unvented attics can be insulated with lower-cost alternative insulation material, such as fiberglass batts, blown cellulose and blown fiberglass, rather than polyurethane spray foam and rigid board insulation.
This provides more material choices for designers, builders, and consumers who have issues with expense, the greenhouse gas potential of blowing agents, impacts of fire retardants, and off-gassing of some insulation products.
In regions with high wildfire occurrence, elimination of eave vents and air sealing the upper attic vents at ridges significantly decreases entry paths for embers that could start a house fire. In hurricane zones, eliminating roof vents reduces the entry way for rainwater during storms.
Continuing education credits for AIA (1.5 AIA LU/HSWs) and ICC (.15 ICC) members will be available. A certificate of attendance will be provided for self-reporting to the professional organization.