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NorthernSTAR Project Overcoat: Exterior Insulation Strategies for 1.5-Story Roof Applications in Cold Climates

Publicly accessible License 

This is a repository for all NorthernSTAR Overcoat insulation retrofit projects. Both houses received Overcoat insulation retrofit on roof only, performed by Cocoon Insulation.

1 - St. Louis Park house - St. Louis Park, MN
2 - Edina house - Edina, MN

In this second study, the team wished to analyze the before and after air-tightness data from roof only ETMMS retrofits on 1.5-story homes in cold and very cold climates. To identify homes to analyze, we reached out to our national network of energy professionals, home performance contractors, and general contractors who had expressed interest in promoting roof-only External Thermal Moisture Management System (ETMMS) to clients. Five projects by three contractors were submitted for consideration as they were being done to mitigate severe ice dams for homeowners. Only two of the five projects followed a roof only ETMMS protocol. Data from the other three projects, however, were reviewed with the air-tightness data of 250 roof-only, interior-applied energy retrofits on 1.5-story homes provided by three NorthernSTAR industry partners. These data represent homes in the general market as well as homes that were part of the state of Minnesota weatherization program.

Airtightness Results of Roof-Only Air Sealing Strategies on 1.5-Story Homes in Cold Climates

In 2012, the NorthernSTAR Building America Partnership began exploring alternative methods to find long-term solutions to energy loss in 1.5- story homes to save energy... more

Eave detail existing.jpg

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Eave detail insulated.jpg

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Edina House post retrofit.jpg

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Overcoat GM1 My Case POST-RETROFIT.xml

This is not a real structure. This is the "model house" AFTER incorporating the insulation and airtightness retrofit package installed in NorthernSTAR Overcoat project... more
74

Overcoat GM1 My Case PRE-RETROFIT.xml

This is not a real structure. This is the "model house" BEFORE incorporating the insulation and airtightness retrofit package installed in NorthernSTAR Overcoat projec... more
81

Overcoat GM1 My Case2 POST-RETROFIT.xml

This is not a real structure. This is the "model house" AFTER incorporating the insulation and airtightness retrofit package installed in NorthernSTAR Overcoat project... more
67

Overcoat GM1 My Case2 PRE-RETROFIT.xml

This is not a real structure. This is the "model house" BEFORE incorporating the insulation and airtightness retrofit package installed in NorthernSTAR Overcoat projec... more
72

Overcoat roof detail.jpg

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St Louis Park House post retrofit.jpg

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49

Citation Formats

TY - DATA AB - This is a repository for all NorthernSTAR Overcoat insulation retrofit projects. Both houses received Overcoat insulation retrofit on roof only, performed by Cocoon Insulation. 1 - St. Louis Park house - St. Louis Park, MN 2 - Edina house - Edina, MN In this second study, the team wished to analyze the before and after air-tightness data from roof only ETMMS retrofits on 1.5-story homes in cold and very cold climates. To identify homes to analyze, we reached out to our national network of energy professionals, home performance contractors, and general contractors who had expressed interest in promoting roof-only External Thermal Moisture Management System (ETMMS) to clients. Five projects by three contractors were submitted for consideration as they were being done to mitigate severe ice dams for homeowners. Only two of the five projects followed a roof only ETMMS protocol. Data from the other three projects, however, were reviewed with the air-tightness data of 250 roof-only, interior-applied energy retrofits on 1.5-story homes provided by three NorthernSTAR industry partners. These data represent homes in the general market as well as homes that were part of the state of Minnesota weatherization program. AU - Jacobson, Rolf A2 - Ojzcyk, Cindy A3 - Mosiman, Garrett A4 - Murry, T DB - Open Energy Data Initiative (OEDI) DP - Open EI | National Renewable Energy Laboratory DO - 10.25984/2204244 KW - building america KW - Roof Deck Ventilation KW - adhered applied membrane KW - attic insulation KW - exterior insulation KW - residential KW - deep energy retrofit KW - very cold KW - cold KW - airtightness KW - existing home KW - single family detached KW - BuildingAmerica KW - air sealing KW - spray foam insulation KW - roof insulation LA - English DA - 2016/04/27 PY - 2016 PB - University of Minnesota - NorthernSTAR Building America Partnership T1 - NorthernSTAR Project Overcoat: Exterior Insulation Strategies for 1.5-Story Roof Applications in Cold Climates UR - https://doi.org/10.25984/2204244 ER -
Export Citation to RIS
Jacobson, Rolf, et al. NorthernSTAR Project Overcoat: Exterior Insulation Strategies for 1.5-Story Roof Applications in Cold Climates. University of Minnesota - NorthernSTAR Building America Partnership, 27 April, 2016, Open Energy Data Initiative (OEDI). https://doi.org/10.25984/2204244.
Jacobson, R., Ojzcyk, C., Mosiman, G., & Murry, T. (2016). NorthernSTAR Project Overcoat: Exterior Insulation Strategies for 1.5-Story Roof Applications in Cold Climates. [Data set]. Open Energy Data Initiative (OEDI). University of Minnesota - NorthernSTAR Building America Partnership. https://doi.org/10.25984/2204244
Jacobson, Rolf, Cindy Ojzcyk, Garrett Mosiman, and T Murry. NorthernSTAR Project Overcoat: Exterior Insulation Strategies for 1.5-Story Roof Applications in Cold Climates. University of Minnesota - NorthernSTAR Building America Partnership, April, 27, 2016. Distributed by Open Energy Data Initiative (OEDI). https://doi.org/10.25984/2204244
@misc{OEDI_Dataset_5179, title = {NorthernSTAR Project Overcoat: Exterior Insulation Strategies for 1.5-Story Roof Applications in Cold Climates}, author = {Jacobson, Rolf and Ojzcyk, Cindy and Mosiman, Garrett and Murry, T}, abstractNote = {This is a repository for all NorthernSTAR Overcoat insulation retrofit projects. Both houses received Overcoat insulation retrofit on roof only, performed by Cocoon Insulation.

1 - St. Louis Park house - St. Louis Park, MN
2 - Edina house - Edina, MN

In this second study, the team wished to analyze the before and after air-tightness data from roof only ETMMS retrofits on 1.5-story homes in cold and very cold climates. To identify homes to analyze, we reached out to our national network of energy professionals, home performance contractors, and general contractors who had expressed interest in promoting roof-only External Thermal Moisture Management System (ETMMS) to clients. Five projects by three contractors were submitted for consideration as they were being done to mitigate severe ice dams for homeowners. Only two of the five projects followed a roof only ETMMS protocol. Data from the other three projects, however, were reviewed with the air-tightness data of 250 roof-only, interior-applied energy retrofits on 1.5-story homes provided by three NorthernSTAR industry partners. These data represent homes in the general market as well as homes that were part of the state of Minnesota weatherization program.}, url = {https://data.openei.org/submissions/5179}, year = {2016}, howpublished = {Open Energy Data Initiative (OEDI), University of Minnesota - NorthernSTAR Building America Partnership, https://doi.org/10.25984/2204244}, note = {Accessed: 2025-07-22}, doi = {10.25984/2204244} }
https://dx.doi.org/10.25984/2204244

Details

Data from Apr 27, 2016

Last updated Nov 1, 2023

Submitted Apr 27, 2016

Organization

University of Minnesota - NorthernSTAR Building America Partnership

Contact

Rolf Jacobson

jaco0630@umn.edu

Authors

Rolf Jacobson

University of Minnesota - NorthernSTAR Building America Partne...

Cindy Ojzcyk

University of Minnesota - NorthernSTAR Building America Partne...

Garrett Mosiman

University of Minnesota - NorthernSTAR Building America Partne...

T Murry

University of Minnesota - NorthernSTAR Building America Partne...

DOE Project Details

Project Name Building America

Project Number FY14 AOP 1.9.1.19

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