Older buildings tend to have a suspended floor structure, where floorboards are fixed onto joists above an empty void (or ‘crawlspace’). //--> Underfloor insulation is essential with EPS, XPS and Foilboard insulation panels, preventing airflow and heat loss or intrusion. If there’s access from below, for example a crawl space or cellar, installing insulation is fairly straightforward. A vapor barrier could also benefit homes with damp basements. However, property assessed clean energy (PACE) financing can help homeowners make energy-saving improvements with no money down. Underfloor insulation will help eliminate drafts in homes that are raised above the ground (those that have a crawlspace or are set on piers). It is the DIY solution that will keep your home warm, dry and healthy. Once the floorboards are lifted, the options are similar to installing from below; either to friction fit semi-rigid insulation boards or slabs, hold the rigid insulation in place with tacks, or fix netting to the top of the joists in such a way that it creates a trough between two joists. For residences with an unheated basement or a room above an unheated garage, underfloor insulation could be cheaper than installing insulating and ductwork. They are a moisture resistant, high performance option that's easy to install and have high thermal R-Values. Homeowners left to rely on sump pumps or dehumidifiers to keep their basements dry should consider installing a layer of insulation under the first floor. [CDATA[// >