Rebates are prorated based on the basement or crawlspace area improved, with a minimum 20% of total basement crawlspace or wall area required to be upgraded in order to qualify. The 20% minimum area drops to 5% if the retrofit upgrades result in 100% total coverage of basement or crawlspace walls/floor above crawl space. When both a basement and a crawl space are present, all applicable grants are prorated to a maximum of $1,000 based on the total wall area.
The $500 bonus rebate amount for foundation exterior walls includes pony wall, basement walls, and crawlspace exterior walls, but not floor above the crawlspace.
As an example, upgrading 20% of the total basement wall area by adding an R23 will result in eligibility for a rebate of $250, or 20% of the maximum $1,250 rebate amount. Upgrading the entirety of the total basement wall area by adding an R23 will result in eligibility for a basement wall rebate of $1,250 and the bonus $500 rebate for achieving 100% coverage, for a final rebate eligibility total of $1,750.