What is polyisocyanurate insulation used for?
Polyisocyanurate (Polyiso) is a closed-cell, rigid foam board insulation that is bonded to facers on both sides, which are composed of various organic and inorganic materials. Polyiso is used in roof, wall, ceiling and specialty applications within commercial and residential buildings of all types.
What is the R-value of polyisocyanurate?
For the R-value of polyiso wall insulation, a full thickness, 180 day aged value is recommended. Foilfaced polyiso has an R-value of about 6.5 per inch and permeability faced polyiso wall insulation has an R-value of around 6.0 per inch.
How is polyisocyanurate made?
Polyisocyanurate foam (polyiso foam) is a cellular, thermoset plastic formed when two basic liquid chemicals, isocyanurate and polyol, are combined in the presence of a catalyst that helps the molecules to rearrange and join, a blowing agent to create closed cells in the structure, flame retardents, and possibly other …
Why is there a shortage of insulation?
The ongoing global pandemic coupled with severe winter storms that hit the southern U.S. in February 2021 have caused massive delays and shortages in the chemical components of foam. Suppliers of everything from furniture and mattresses to boats and blown-in insulation are coping with shortages of this major component.
Why is there a shortage of foam?
Thanks to the unusually harsh freezing temperatures during the past winter, many places that manufacture foam cannot produce the foam in normal quantities. The harsh winter deep freeze combined with the shutdown from 2020has left the foam industry with a huge demand but no supply at the ready.
What happens if polyiso gets wet?
If an insulation, polyiso or polystyrene, is submerged in water, the insulation benefit disappears as the water short circuits around the insulation. Insulations must be kept dry. If minor contact does occur, the foil facings and closed cells of polyiso provide excellent water resistance.
Which rigid insulation should I Choose?
Choose the right type of rigid foam for your needs. When choosing rigid foam insulation, you have three main options: Polyisocyanurate: Known as polyiso for short, polyisocyanurate foam has the highest R-value per inch (R-6.5 to R-6.8) of any rigid insulation.
Is polyiso insulation flammable?
Polyisocyanurate has a melting point of over 392° Fahrenheit (200° Celsius ). When used as foam board, it is a material made up of minute closed cells that contain hydrochlorofluorocarbon (HCFC) gas, which is non-flammable, inert, and an excellent insulator.
What is poly – ISO insulation?
Polyisocyanurate, also referred to as PIR, polyiso, or ISO, is a thermoset plastic typically produced as a foam and used as rigid thermal insulation.
What is polyiso rigid foam insulation?
What is Polyiso INSULATION. Polyisocyanurate (Polyiso) is a closed-cell, rigid foam board insulation that is bonded to facers on both sides, which are composed of various organic and inorganic materials.