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IntroductionThis guide provides information on how to construct vapor diffusion ports when using fiberglass and mineral wool insulation with conditioned unvented attics and unconditioned unvented… Read More

This guide provides mechanical ventilation requirements of occupied spaces in new low-rise residential buildings including single-family houses and multifamily structures such as apartment buildings… Read More

The purpose of this guide is to provide useful examples of high performance retrofit techniques for the building enclosure of wood frame residential construction in a cold and somewhat wet climate.… Read More

High performance precast concrete enclosure walls stand apart from most "rainscreen" walls in several key respects: how they control rain penetration, how they provide airtightness, and their… Read More

This guide describes ways to meet the roof venting requirements as per building code while converting the attic into living space by moving the insulation to the underside of the roof deck between… Read More

This guide describes ways to attach siding in cases where wood sheathing is not used and provides prescriptive guidance on cladding attachment as per building code that allows cladding attachment… Read More

This guide details the interior vapor retarder requirements as per building code when insulating sheathing is installed on the outside of an exterior wall. The interior vapor retrader can be removed… Read More

This guide details wall bracing requirements for insulating sheathing as per building code and clarifies whether insulation board can be installed in lieu of plywood on the outside on an exterior… Read More

This guide provides code requirements for basement insulation and clarifies whether building code allows for leaving insulation exposed in the basement. The requirements are based on whether the… Read More

This appendix contains Building Science Information Sheets that provide more information for specific inspection points on the BSC Building America Quality Control Checklist. Each Information Sheet… Read More