Exposed Foam Board Insulation

Those are all viable options but perhaps the most sought after option is to insulate with foam board on the inside of the foundation wall so you don t have to worry about the above grade exposure.

Exposed foam board insulation.

Click to add item r 3 expanded polystyrene foam board insulation 3 4 x 14 1 2 x 48 6 pk to the compare list. Foamular 250 product data sheet pdf v 1593673075000 1 45 mb. Xps has an r value of 4 5 to 5 0 per inch of thickness. For new construction use rigid boards to insulate slabs and the outside of foundation walls.

If warm moist house air. This insulation board is probably one of the most widely used foam board insulation products in the residential construction industry. Use a premade kit for this type of project. Compare click to add item r 3 expanded polystyrene foam board insulation 3 4 x 14 1 2 x 48 6 pk to the compare list.

Foam insulation board should not be left exposed in building interiors. For a basement remodeling project consider insulating basement walls with foam board. As far as i know most types of rigid foam insulation can t be left exposed but need to be covered with a layer of drywall for fire resistance. The problem with that application has always been that the foam board needed to be covered with a thermal barrier or flame spread barrier like drywall in order to meet local fire codes.

As already noted a decent thickness of extruded foam insulation may create a pretty good air vapour barrier especially when covered with taped and painted drywall. Typically sold as sheet insulation in a standard size of 4 x 8 foam insulation panels can help reduce energy costs get a handle on moisture control and more. Attach the tongue and groove insulation boards to the concrete wall with adhesive. While many modern foam insulating products do not themselves readily support combustion that is they don t catch fire and burn alone they may give off thick acrid or toxic black smoke in a fire making it difficult to safely exit the burning building.

Polyisocyanurate is another option coming in as the densest and more expensive option for foam board. Foam insulation alternatives to solid foam board insulation.