3.1401.1 Basements Connected to Crawl Spaces—Sealing and Insulating

Topic: 
Basements and Crawl Spaces
Subtopic: 
Basements Connected to Crawl Spaces
Desired Outcome: 
Crawl spaces and basements separated using appropriate methods that define spaces and allow for treatment in accordance with specifications
TitleSpecification(s)Objective(s)
3.1401.1a
Conditioned basements with vented crawl spaces

Crawl space will be separated from the conditioned basement Conditioned basement A below- or partially below-grade livable space with concrete or finished floor that is intentionally heated or cooled with a continuous air barrier Air barrier The separation between the interior and exterior environments of a building that slows air flow to the point that no smoke movement is visible at 50 pascals of pressure difference across the boundary , ground moisture barrier, and thermal boundary Thermal boundary The separation between the interior and exterior environments of a building that slows heat flow

Create separation and define spaces

Enable treatment of crawl spaces and basements by referenced specifications

Increase house durability and energy efficiency

3.1401.1b
Conditioned basements with closed crawl spaces

Crawl space will be separated from the conditioned basement Conditioned basement A below- or partially below-grade livable space with concrete or finished floor that is intentionally heated or cooled with a continuous air barrier Air barrier The separation between the interior and exterior environments of a building that slows air flow to the point that no smoke movement is visible at 50 pascals of pressure difference across the boundary and ground moisture barrier

Create separation and define spaces

Enable treatment of crawl spaces and basements by referenced specifications

Increase house durability and energy efficiency

3.1401.1c
Unconditioned basements with vented crawl spaces

Vented crawl space Vented crawl space A foundation that uses wall vents as a primary means to control moisture. Insulation is located at the conditioned floor level above the crawl space will be separated from the unconditioned basement Unconditioned basement A below- or partially below-grade livable space with concrete or finished floor without intentional heating or cooling with a continuous air barrier Air barrier The separation between the interior and exterior environments of a building that slows air flow to the point that no smoke movement is visible at 50 pascals of pressure difference across the boundary and ground moisture barrier

Create separation and define spaces

Enable treatment of crawl spaces and basements by referenced specifications

Increase house durability and energy efficiency

3.1401.1d
Unconditioned basements with closed crawl spaces

Unconditioned basement Unconditioned basement A below- or partially below-grade livable space with concrete or finished floor without intentional heating or cooling will be treated as an extension of the closed crawl space Closed crawl space A foundation without wall vents that uses air-sealed walls, ground and foundation moisture control, and mechanical drying methods to control crawl space moisture. Insulation may be located at the conditioned floor level or on the exterior walls. Return pathways are not allowed from the crawl space to the living space

Create separation and define spaces

Enable treatment of crawl spaces and basements by referenced specifications

Increase house durability and energy efficiency