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Title: External Insulation of Masonry Walls and Wood Framed Walls

The use of exterior insulation on a building is an accepted and effective means to increase the overall thermal resistance of the assembly that also has other advantages of improved water management and often increased air tightness of building assemblies. For thin layers of insulation (1” to 1 ½”), the cladding can typically be attached directly through the insulation back to the structure. For thicker insulation layers, furring strips have been added as a cladding attachment location. This approach has been used in the past on numerous Building America test homes and communities (both new and retrofit applications), and has been proven to be an effective and durable means to provide cladding attachment. However, the lack of engineering data has been a problem for many designers, contractors, and code officials. This research project developed baseline engineering analysis to support the installation of thick layers of exterior insulation on existing masonry and frame walls. Furthermore, water management details necessary to integrate windows, doors, decks, balconies and roofs were created to provide guidance on the integration of exterior insulation strategies with other enclosure elements.
Authors:
 [1]
  1. Building Science Corporation, Somerville, MA (United States)
Publication Date:
OSTI Identifier:
1219894
Report Number(s):
DOE/GO--102013-3571
6080
DOE Contract Number:
AC36-08GO28308; KNDJ-0-40337-00
Resource Type:
Technical Report
Research Org:
Building Science Corporation, Somerville, MA (United States)
Sponsoring Org:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Building Technologies Office (EE-5B) (Building America)
Country of Publication:
United States
Language:
English
Subject:
insulation; furring strips; cladding attachment; retrofit; expanded polystyrene; extruded polystyrene; polyisocyanurate; rockwool; thermal bridging; Building America; residential; residential building