Polystyrene loose fill or bead insulation typically has a lower r value compared to the foam board.
Polystyrene bead insulation r value.
Your images show mechanically crushed eps polystyrene.
Another application in construction for polystyrene beads is retrofit insulation of un insulated exterior walls.
Garage door insulation spray foam insulation faced insulation soundproofing insulation insulation outdoor roof material high temp material.
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.
Each type comes with unique advantages.
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.
Department of energy while inspectapedia reports the r value of polystyrene beads at 2 3 per inch.
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.
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.
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.
Insulation is a critical component of buildings.
Loose fill polystyrene is a hazard.
Recent concerns have been raised about the brominated flame retardant hbcd hexabromocyclododecane for the organic chemists among us see flame retardant used in polystyrene to be banned by eu that is found in all polystyrene insulation both extruded.
This product typically has an r value of 3 6 to 4 0 per inch of thickness.
Expanded polystyrene foam eps is the cheapest and least used foam board product on the market.
Also called styrofoam insulation this is the least expensive material.
If the puffed beads fill the cavity the space can obtain r values close to that of fiberglass insulation.
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Material costs are about 0 31 per square foot for each inch of thickness plus installation costs.
