It’s also a good opportunity to insulate any underfloor piping you have access to. If you are unsure if you qualify for this Grant, then please complete our enquiry form & a member of our team will help you through the process. .page-contractor-chriswell-home-improvements-chriswell-home-improvements-inc .quality-first-video__main-photo {display: none} Hot air rises, therefore, the cold air outside the house will actually make the insulation colder than the interior. In colder climates, another option (if feasible), is to seal off the crawl space and insulate the exterior walls rather than the floor.