Polystyrene Bead Insulation R Value

In this application the puffed beads are poured into the wall cavity between the studs by drilling a hole in the top of the wall.

Polystyrene bead insulation r value.

Also called styrofoam insulation this is the least expensive material. Department of energy while inspectapedia reports the r value of polystyrene beads at 2 3 per inch. Polyisocyanurate insulation materials polyisocyanurate or polyiso is a thermosetting type of plastic closed cell foam that contains a low conductivity hydrochlorofluorocarbon free gas in its cells. Another application in construction for polystyrene beads is retrofit insulation of un insulated exterior walls.

Expanded polystyrene made from expanded foam beads that are molded into shape expanded polystyrene or eps is ideal for above grade applications such as exterior walls and offers an r value of 3 6 to 4 2 per inch. Each type comes with unique advantages. Products with a higher r value have a higher cost but have an increased capacity to resist heat flow and therefore provide greater insulation. If the puffed beads fill the cavity the space can obtain r values close to that of fiberglass insulation.

Loose fill polystyrene is a hazard. It provides r values that range from 3 6 to 4 2 per inch. This product typically has an r value of 3 6 to 4 0 per inch of thickness. Select 2 to 4 items to compare.

Expanded polystyrene insulation is similar to the foam used for packing peanuts and it s typically used for insulated concrete forms also knows as icf s. Material costs are about 0 31 per square foot for each inch of thickness plus installation costs. Additional r value for a masonry wall constructed using these materials needs to add the insulating value of additional wall components typically included such as 1 solid foam polyisocyanurate r 8 extruded polystyrene r 5 expanded polystyrene r 4 or 1 of perlite r 2 7 and for an exterior air film winter no wind r 0 17 an interior. Insulation is a critical component of buildings.

Your images show mechanically crushed eps polystyrene. Perlite and vermiculite granular fill offer an r value of up to 2 4 per inch according to the u s. Expanded polystyrene foam eps is the cheapest and least used foam board product on the market.