2.0404.2 Crawl Spaces—Preliminary Dehumidification

Topic: 
Moisture
Subtopic: 
Space Conditioning
Desired Outcome: 
A dry and moisture controlled space ensured
For supporting material, see Referenced Standards and Calculation of the Infiltration Credit.
TitleSpecification(s)Objective(s)
2.0404.2a
Close vents

Vents and other openings will be closed after ensuring sufficient combustion air for fuel-burning appliances in accordance with 2012 IRC IRC International Residential Code G2407.5.1

Reduce moisture load coming from outside of the crawl space
2.0404.2b
Drying

If liquid moisture is present, the area will be dried until any liquid moisture is eliminated

Improve work environment

Reduce moisture in the crawl space
2.0404.2c
Drying time

Space will be dehumidified until wood moisture content in solid, untreated lumber is less than 20%

Reduce moisture content of wood
TitleSpecification(s)Objective(s)
2.0404.2a
Close vents

Vents and other openings will be closed after ensuring sufficient combustion air for fuel burning appliances in accordance with 2012 IRC IRC International Residential Code G2407.5.1

Reduce moisture load coming from outside of the crawl space
2.0404.2b
Drying

If liquid moisture is present, the area will be dried until any liquid moisture is eliminated

Reduce moisture in the crawl space

Improve work environment
2.0404.2c
Drying time

Space will be dehumidified until wood moisture content in solid, untreated lumber is less than 20%

Reduce moisture content of wood