Crawlspaces can be insulated two ways: insulating the ceiling for a vented crawlspace or insulating the walls for an unvented crawlspace. Icynene spray foam insulation can be used in both ways to help address common problems associated with uninsulated or poorly insulated crawlspaces.
Foam insulated crawlspaces can eliminate the probability of cold and uncomfortable floors above, as well as minimize the risk of buckling hardwood floors resulting from moisture buildup.
HVAC systems in spray foam insulated unvented crawlspaces can work more efficiently since they are in a more hospitable temperature environment. Plus, infiltration of air and accompanying moisture can be minimized to prevent condensation on the ductwork.
Spray foam insulation allows for an effective air seal in a traditionally difficult-to-insulate space as well as increased durability of the structure.
Crawlspace code references
- Under floor space (vented and unvented crawl space)
- Local codes based on IRC 2009, 2012 and 2015: Section R408
- Foam plastic (spray foam)
- Local codes based on IRC 2009, 2012 and 2015: Section R316
- Energy efficiency of building thermal envelope
- Local codes based on IRC 2009, 2012 and 2015: Section N1102