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Field Testing Unvented Roofs with Asphalt Shingles in Cold and Hot-humid Climates

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BSC TO5 Task 7.1 Field Testing Unvented Roofs with Asphalt Shingles in Cold Climates - Bolingbrook, IL 60440
BSC TO5 Task 7.1 Field Testing Unvented Roofs with Asphalt Shingles in Hot-Humid Climates - Friendswood, TX 77546

To understand the long-term moisture performance of unvented roof assemblies with fibrous insulation, the U.S. Department of Energy's Building America team Building Science Corporation built and monitored test roofs in two climates: a cold-climate test house in Bolingbrook, Illinois (Chicago area; zone 5A), and a hot-humid test house in Friendswood, Texas (Houston area, zone 2A). The Chicago-area test bed had seven parallel experimental rafter bays. The assemblies included a control vented compact (cathedral) roof, a dense-pack cellulose unvented roof, and an unvented roof with a "diffusion vent" (a strip of vapor-permeable gypsum sheathing at the ridge to allow drying). The interior finish was gypsum wallboard (GWB) with latex paint. The other four bays were top vent roof assemblies, which have a polypropylene breather mesh between the roof sheathing and the asphalt shingles to allow ventilation drying of the assembly from underneath the vapor-impermeable shingles. Two of the four "top vent" roofs were fiberglass batt and two were dense-pack cellulose roofs with either interior GWB or open to the interior. Wintertime moisture-related failure was accelerated by providing interior humidification (22.2 degree C [72 degree F]/50% relative humidity [RH]), which is known to be an extreme interior loading). Data were captured over 8 months, including a winter and the following spring and early summer.

Citation Formats

TY - DATA AB - BSC TO5 Task 7.1 Field Testing Unvented Roofs with Asphalt Shingles in Cold Climates - Bolingbrook, IL 60440 BSC TO5 Task 7.1 Field Testing Unvented Roofs with Asphalt Shingles in Hot-Humid Climates - Friendswood, TX 77546 To understand the long-term moisture performance of unvented roof assemblies with fibrous insulation, the U.S. Department of Energy's Building America team Building Science Corporation built and monitored test roofs in two climates: a cold-climate test house in Bolingbrook, Illinois (Chicago area; zone 5A), and a hot-humid test house in Friendswood, Texas (Houston area, zone 2A). The Chicago-area test bed had seven parallel experimental rafter bays. The assemblies included a control vented compact (cathedral) roof, a dense-pack cellulose unvented roof, and an unvented roof with a "diffusion vent" (a strip of vapor-permeable gypsum sheathing at the ridge to allow drying). The interior finish was gypsum wallboard (GWB) with latex paint. The other four bays were top vent roof assemblies, which have a polypropylene breather mesh between the roof sheathing and the asphalt shingles to allow ventilation drying of the assembly from underneath the vapor-impermeable shingles. Two of the four "top vent" roofs were fiberglass batt and two were dense-pack cellulose roofs with either interior GWB or open to the interior. Wintertime moisture-related failure was accelerated by providing interior humidification (22.2 degree C [72 degree F]/50% relative humidity [RH]), which is known to be an extreme interior loading). Data were captured over 8 months, including a winter and the following spring and early summer. AU - Ueno, Kohta A2 - Lstiburek, Joseph DB - Open Energy Data Initiative (OEDI) DP - Open EI | National Renewable Energy Laboratory DO - 10.25984/2204219 KW - building america KW - BuildingAmerica KW - ASHRAE 160 KW - asphalt shingles KW - cellulose KW - conditioned attic KW - insulation KW - residential KW - roof insulation KW - roof retrofit KW - unvented attic KW - cold KW - hot humid KW - cost effectiveness KW - temperature KW - hvac KW - new construction KW - existing home KW - single family KW - multifamily KW - moisture monitoring LA - English DA - 2016/04/27 PY - 2016 PB - Building Science Corporation T1 - Field Testing Unvented Roofs with Asphalt Shingles in Cold and Hot-humid Climates UR - https://doi.org/10.25984/2204219 ER -
Export Citation to RIS
Ueno, Kohta, and Joseph Lstiburek. Field Testing Unvented Roofs with Asphalt Shingles in Cold and Hot-humid Climates. Building Science Corporation, 27 April, 2016, Open Energy Data Initiative (OEDI). https://doi.org/10.25984/2204219.
Ueno, K., & Lstiburek, J. (2016). Field Testing Unvented Roofs with Asphalt Shingles in Cold and Hot-humid Climates. [Data set]. Open Energy Data Initiative (OEDI). Building Science Corporation. https://doi.org/10.25984/2204219
Ueno, Kohta and Joseph Lstiburek. Field Testing Unvented Roofs with Asphalt Shingles in Cold and Hot-humid Climates. Building Science Corporation, April, 27, 2016. Distributed by Open Energy Data Initiative (OEDI). https://doi.org/10.25984/2204219
@misc{OEDI_Dataset_5512, title = {Field Testing Unvented Roofs with Asphalt Shingles in Cold and Hot-humid Climates}, author = {Ueno, Kohta and Lstiburek, Joseph}, abstractNote = {BSC TO5 Task 7.1 Field Testing Unvented Roofs with Asphalt Shingles in Cold Climates - Bolingbrook, IL 60440
BSC TO5 Task 7.1 Field Testing Unvented Roofs with Asphalt Shingles in Hot-Humid Climates - Friendswood, TX 77546

To understand the long-term moisture performance of unvented roof assemblies with fibrous insulation, the U.S. Department of Energy's Building America team Building Science Corporation built and monitored test roofs in two climates: a cold-climate test house in Bolingbrook, Illinois (Chicago area; zone 5A), and a hot-humid test house in Friendswood, Texas (Houston area, zone 2A). The Chicago-area test bed had seven parallel experimental rafter bays. The assemblies included a control vented compact (cathedral) roof, a dense-pack cellulose unvented roof, and an unvented roof with a "diffusion vent" (a strip of vapor-permeable gypsum sheathing at the ridge to allow drying). The interior finish was gypsum wallboard (GWB) with latex paint. The other four bays were top vent roof assemblies, which have a polypropylene breather mesh between the roof sheathing and the asphalt shingles to allow ventilation drying of the assembly from underneath the vapor-impermeable shingles. Two of the four "top vent" roofs were fiberglass batt and two were dense-pack cellulose roofs with either interior GWB or open to the interior. Wintertime moisture-related failure was accelerated by providing interior humidification (22.2 degree C [72 degree F]/50\% relative humidity [RH]), which is known to be an extreme interior loading). Data were captured over 8 months, including a winter and the following spring and early summer.}, url = {https://data.openei.org/submissions/5512}, year = {2016}, howpublished = {Open Energy Data Initiative (OEDI), Building Science Corporation, https://doi.org/10.25984/2204219}, note = {Accessed: 2025-05-05}, doi = {10.25984/2204219} }
https://dx.doi.org/10.25984/2204219

Details

Data from Apr 27, 2016

Last updated Nov 1, 2023

Submitted Apr 27, 2016

Organization

Building Science Corporation

Contact

Kohta Ueno

Authors

Kohta Ueno

Building Science Corporation

Joseph Lstiburek

Building Science Corporation

DOE Project Details

Project Name Building Ameica

Project Number FY15 AOP 1.9.1.19

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