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      A COMPARISON OF SEALED AND VENTILATED ATTIC SPACES: A CASE STUDY OF RESIDENTIAL ATTIC DESIGN

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          Abstract

          Two attics were constructed as part of a building renovation project at the University of West Florida. The first attic is described as a traditional ventilated attic, with openings in the soffits and a small dormer vent on the roof. The second attic is described as a sealed attic (with no ventilation), and open-cell spray foam insulation installed on the underside of the roof deck. The study was undertaken to demonstrate hypothesized performance differences between attic types. Thermal and relative humidity sensors were installed to measure the condition of the air in the two attics spaces, and measurements were taken at 15 minute intervals. Measurements of relative humidity were later calculated as dew point and specific humidity. Similar studies are often conducted by comparison of attics in separate buildings under different use conditions. This project offers a unique opportunity to explore data collected from a single structure, and provides support for existing research on attic design in southern regions. The resultant data show significant differences in attic temperatures, with the sealed attic exhibiting a much more thermally stable pattern. There were also significant differences in attic dew points and specific humidity, although these differences appear to be much less pronounced. Data were analyzed using independent t-tests to establish significant differences between means. Overall, the sealed attic performed better than the ventilated attic, although dew point and specific humidity remain concerns.

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          Performance characteristics and practical applications of common building thermal insulation materials

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            Cool and green roofs. An energy and comfort comparison between passive cooling and mitigation urban heat island techniques for residential buildings in the Mediterranean region

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              Analyzing a database of residential air leakage in the United States

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                Author and article information

                Journal
                jgrb
                Journal of Green Building
                College Publishing
                1552-6100
                1943-4618
                1943-4618
                Summer 2018
                : 13
                : 3
                : 89-100
                Author notes

                1. Assistant Professor, Department of Instructional Workforce and Applied Technology, University of West Florida, Pensacola, FL

                2. Assistant Professor, The William States Lee College of Engineering, Engineering Technology and Construction Management, University of North Carolina Charlotte

                3. CxA, Building Energy Sciences, Pensacola, FL.

                Article
                jgb.13.3.89
                10.3992/1943-4618.13.3.89
                5a32124f-0c68-4cb0-8546-700c7a12478e
                © 2018 College Publishing
                History
                Page count
                Pages: 12
                Categories
                RESEARCH ARTICLES

                Urban design & Planning,Civil engineering,Environmental management, Policy & Planning,Architecture,Environmental engineering
                residential construction,cool roof,roof design,ventilated attic,sealed attic,energy efficiency

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