Specification History
| SWS Version | Created | Specification ID | Title | Specification | Objective | Supporting Materials | Rationale | Status |
|---|---|---|---|---|---|---|---|---|
| Version 2020 | 08/14/2020 - 14:23 | 4.0103.5e | Installation | Apply SPF to prescribed R-value in a continuous layer over entire attic ceiling from exterior wall top-plate to exterior wall top-plate using a pass thickness maximum in accordance with manufacturer specifications In colder climates (IECC Zones 5-8), install SPF to a thickness of at least a class II vapor retarder or have at least a class II vapor retarder coating or covering in direct contact with the underside of the SPF |
Continuous and contiguous pressure and thermal boundary that prevents vapor intrusion |
Black Line | ||
| Version 2020 | 08/14/2020 - 14:23 | 4.0103.5e | Installation | Apply SPF to prescribed R-value in a continuous layer over entire attic ceiling from exterior wall top-plate to exterior wall top-plate using a pass thickness maximum in accordance with manufacturer specifications In colder climates (IECC Zones 5-8), install SPF to a thickness of at least a class II vapor retarder or have at least a class II vapor retarder coating or covering in direct contact with the underside of the SPF |
Continuous and contiguous pressure and thermal boundary that prevents vapor intrusion |
Black Line |