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Title: 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 homesmore » using similar air seal methods.« less
Authors:
; ;
Publication Date:
OSTI Identifier:
1144819
Report Number(s):
DOE/GO-102014-4431
KNDJ-0-40338-03
DOE Contract Number:
AC36-08GO28308
Resource Type:
Technical Report
Resource Relation:
Related Information: Work performed by NorthernSTAR Building America Partnership, St. Paul, Minnesota
Research Org:
National Renewable Energy Laboratory (NREL), Golden, CO.
Sponsoring Org:
USDOE Office of Energy Efficiency and Renewable Energy Building Technologies Office
Country of Publication:
United States
Language:
English
Subject:
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; 42 ENGINEERING RESIDENTIAL; RESIDENTIAL BUILDINGS; NORTHERNSTAR; BUILDING AMERICA; AIR SEAL; 1 1/2 STORY BUNGALOW; KNEE WALL; ATTIC INSULATION; SPRAY FOAM; ADHERED APPLIED MEMBRANE; EXTERIOR INSULATION; ICE DAMS; ENERGY HEEL; VAULTED CEILINGS; ROOF-ONLY EXTERIOR INSULATION OVER-LAY; ROOF DECK VENTILATION; Buildings