What is polyisocyanurate rigid foam 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.
What is the difference between XPS and PIR insulation?
With that being said, Extruded Polystyrene (or XPS or “Styrofoam”) can only be used in applications up to 165°F, whereas Polyisocyanurate (or PIR or “Polyiso”) can be used in applications up to 300°F.
How thick is R25 polyiso?
2-inch thick
Develop a 2-inch thick composite foam insulation board with R25 (hr-ft2-F/Btu), with a cost premium of $0.30/ft2.
What is polyisocyanurate insulation used for?
POLYISO is a versatile, high-performance insulation solution that is suitable for a multitude of applications. POLYISO is most commonly used as a continuous insulation for roofs and walls, and as a protective roof cover board.
What is ISO board used for?
What is ISO board? Polyiso, or iso, is a high-performance insulation solution used in a multitude of applications, most notably, in this instance, residential and commercial roofing. Polyiso is short for polyisocyanurate, a rigid insulation board made of closed-cell foam.
What is the R factor of foam insulation?
The R-value of closed-cell foam is R-6.5-7 per inch. Contractors often use it to insulate under slabs, ceilings, walls, and roofs.
What does the R mean in R-value?
resistance to heat flow
The R stands for resistance to heat flow. R-value is universal across all insulation products, so the measurement will mean the same thing no matter who sells or manufactures the insulation. R-value is even consistent across different types of insulation.
What is the difference between polyisocyanurate and polyurethane?
Polyisocyanurate typically has an MDI/polyol ratio, also called its “index”, higher than 180. By comparison polyurethane indices are normally around 100. As the index increases material rigidity (stiffness) increases.
How thick is polyiso?
0.5” to 4.5”
Polyiso roof insulation is typically manufactured in incremental thicknesses from 0.5” to 4.5” with versatile options for meeting energy code requirements.
How thick is R13 rigid insulation?
R13 fiberglass batt insulation, typically used in walls and floors, is 3 5/8 inches thick, according to Energy.gov. Insulation needs and the effectiveness of the insulation vary depending on climate and material.
What is polyisocyanurate made out of?
Polyiso is composed of various inorganic and organic materials. To be Specific Polyiso has four major components like polyol, fire retardant, blowing agent and MDI (methylene diphenyl diisocyanate).
Which rigid foam insulation is best?
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.
How is polyisocyanurate insulation made?
Two rolls of material are unwound and fed toward the laminator. The material will become the top and bottom of the finished product. Compounding – Raw materials are compounded and heated to form the polyol or B-side component of the product formulation.
What thickness does polyiso come in?
What is the R-value of 2 rigid foam?
With an R-value of 13.1 for a 2″ thick sheet only two 2″ sheets are required to achieve R-25. 2. Extruded polystyrene or XPS (foam is usually pink or blue) XPS has an R-value of 5 per inch of thickness requiring 5″ of insulation to achieve R-25.
What is the highest R-value foam board?
Polyisocyanurate (Polyiso/ISO) rigid insulation has the highest R value per inch. It approximately ranges between 6.5 to 6.8.
Is higher or lower R-value better?
R-value measures how well building insulation can prevent the flow of heat into and out of the home. Higher R-value means greater insulation performance, and thus more savings on your next heating and cooling bill.