Thermal Performance of Low Emittance Building Sheathing
- 1 January 1980
- journal article
- research article
- Published by SAGE Publications in Journal of Thermal Insulation
- Vol. 3 (3), 129-141
- https://doi.org/10.1177/109719638000300301
Abstract
Large (3 by 4 m) residential building wall specimens were tested in a calibrated hot box to measure the thermal performance of vertical air spaces formed by siding and sheathing. Test results reveal that the irregular air space formed by beveled siding applied directly over sheathing does not significantly reduce wall heat transfer regardless of effective space emittance. On the other hand, plywood siding applied to sheathing over furring strips to form 19 mm (3/4") plane air spaces having effective emittances of 0.03'and 0.73, produced space thermal resistances (R-values) of 2.45 and 0.89 h-ft 2. F/Btu, respectively, at 5° C (40° F) wall mean emperature. These lower-than-tabulated ASHRAE R-values are attri buted to typical siding/sheathing system variables such as air convection and leakage.Keywords
This publication has 1 reference indexed in Scilit:
- Calibrated Hot Box: An Effective Means for Measuring Thermal Conductance in Large Wall SectionsPublished by ASTM International ,1974