Airtightness Results of Roof-Only Air Sealing Strategies on 1-1/2 Story Homes in Cold Climates
In this second study on solutions to ice dams in 1-1/2 story homes, five test homes located in both cold and very cold climates were analyzed for air leakage reduction rates following modifications by independent contractors on owner-occupied homes. The reason for choosing this house type was they are very common in our area and very difficult to air seal and insulate effectively. Two projects followed a roof-only Exterior Thermal Moisture Management System (ETMMS) process. One project used an interior-only approach to roof air sealing and insulation. The remaining two projects used a deep energy retrofit approach for whole house (foundation wall, above grade wall, roof) air leakage and heat loss reduction. All were asked to provide information regarding project goals, process, and pre and post-blower door test results. Additional air leakage reduction data was provided by several NorthernSTAR Building America industry partners for interior-applied, roof-only modifications on 1-1/2 story homes. The data represents homes in the general market as well as homes that were part of the state of Minnesota weatherization program. A goal was to compare exterior air sealing methods with interior approaches. This pool of data enabled us to compare air tightness data from over 220 homes using similar air seal methods.
- Research Organization:
- National Renewable Energy Laboratory (NREL), Golden, CO.
- Sponsoring Organization:
- USDOE Office of Energy Efficiency and Renewable Energy Building Technologies Office
- DOE Contract Number:
- AC36-08GO28308
- OSTI ID:
- 1144819
- Report Number(s):
- DOE/GO-102014-4431; KNDJ-0-40338-03
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
1 1/2 STORY BUNGALOW
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
42 ENGINEERING
ADHERED APPLIED MEMBRANE
AIR SEAL
ATTIC INSULATION
BUILDING AMERICA
Buildings
ENERGY HEEL
EXTERIOR INSULATION
ICE DAMS
KNEE WALL
NORTHERNSTAR
RESIDENTIAL
RESIDENTIAL BUILDINGS
ROOF DECK VENTILATION
ROOF-ONLY EXTERIOR INSULATION OVER-LAY
SPRAY FOAM
VAULTED CEILINGS
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
42 ENGINEERING
ADHERED APPLIED MEMBRANE
AIR SEAL
ATTIC INSULATION
BUILDING AMERICA
Buildings
ENERGY HEEL
EXTERIOR INSULATION
ICE DAMS
KNEE WALL
NORTHERNSTAR
RESIDENTIAL
RESIDENTIAL BUILDINGS
ROOF DECK VENTILATION
ROOF-ONLY EXTERIOR INSULATION OVER-LAY
SPRAY FOAM
VAULTED CEILINGS