• Water damage susceptible insulation needs to be kept a minimum of 2" above a crawl space floor.

Illustration Source: Summerhill

Illustration Source: Summerhill

9.25.2.3.4) Insulation on the interior of foundation walls enclosing a crawl space shall be applied so that there is not less than 50 mm clearance above the crawl space floor, if the insulation is of a type that may be damaged by water.