What is polyisocyanurate 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. 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 insulation?

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.

Is polyisocyanurate insulation waterproof?

Polyiso. Polyiso is a rigid foam board insulation used for roofing and for insulating walls and ceilings. This creates its closed-cell structure and makes polyiso exceptionally waterproof.

Is polyisocyanurate a foam plastic?

Polyisocyanurate foam plastic insulation, or polyiso for short, meets the most stringent building code requirements for use in buildings of any construction type and is one of the most regulated building products used in the construction of building envelopes.

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 …

What is IsoBoard made of?

IsoBoard is a rigid extruded Polystyrene foam, with excellent thermal insulation characteristics in the temperature range -30 ˚C to + 70 ˚C. IsoBoard is constructed of microscopic gas-filled cells which resemble a honeycomb.

Is polyisocyanurate insulation flammable?

Polyiso insulation, like wood and other organic building materials, is combustible. Therefore, it should not be exposed to an ignition source of sufficient heat and intensity (e.g., flames, fire, sparks, etc.) during transit, storage or product application.

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.

Is polyiso insulation good?

Polyisocyanurate (Polyiso) insulation is an excellent choice for a variety of renovation applications because of its excellent energy conserving qualities. Common construction applications require compressive strengths adequate for polyisocyanurate to maintain its shape during installation, as well as during use.

Is polyisocyanurate foam flammable?

“Rigid polyurethane and polyisocyanurate foams will, when ignited, burn rapidly and produce intense heat, dense smoke and gases which are irritating, flammable and/or toxic. As with other organic [carbon based petrochemical] materials the most significant gas is usually carbon monoxide.

What is ISO boards?

Polyisocyanurate thermal insulation, also referred to as polyiso, PIR, or ISO, is a popular low slope commercial building roof insulation. It is a thermoset, closed-cell foam that is an optimal insulation solution for low slope roofs. It can also be used as a roofing cover board and in building envelope applications.