How much does polyiso insulation cost?
$0.70/sq ft.
The average cost of polyiso insulation is $0.70/sq ft.
How much does foam board cost?
The cost of foam board insulation ranges from about 30 cents per square foot to close to $1.00 depending on the type and thickness of the board. When an insulation contractor installs the insulation, the total cost of materials plus installation is $1.50 to $5.50 for most projects.
What is polyisocyanurate foam?
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.
Is polyiso insulation waterproof?
Foam board insulation doesn’t absorb water, which essentially limits the amount of moisture build-up in your insulation. Polyiso and extruded polystyrene foam boards have the strongest waterproof properties.
Is EPS cheaper than polyiso?
Cost. EPS is less expensive than polyiso on an installed volume basis. The raw materials polyiso is made of is more expensive than styrene and makes a denser foam.
How thick is r25 rigid insulation?
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. EPS has an R-value of approximately 4 per inch of thickness, requiring at least 6″ of insulation to achieve R-25.
Are foam boards waterproof?
Polyiso and extruded polystyrene foam boards have the strongest waterproof properties. Foam boards that are treated with a foil vapor barrier are the best in terms of preventing moisture from reaching surfaces.
What is the difference between XPS and EPS foam?
EPS (expanded) and XPS (extruded) are both closed-cell rigid insulation made from the same base polystyrene resins and manufactured differently, EPS is beads that are molded or cut into various sizes and shapes while XPS is extruded sheets.
What is the R-value of 2 inch ISO board?
R-Value Chart for EnerfoilTM Rigid Foam Faced Insulation
| Thickness (Inches) | R-value (in I-P/Imperial) | RSI (R-value in Metric) |
|---|---|---|
| 1.0 | 6.2 | 1.08 |
| 1.5 | 9.3 | 1.62 |
| 2.0 | 12.4 | 2.16 |
| 2.5 | 15.5 | 2.7 |
Is polyiso waterproof?
Does polyiso absorb water?
Glass faced polyiso goes from absorbing 14x more water than XPS, to absorbing 30x more water than XPS, when measured using the same method. Foil faced polyiso goes from absorbing 1.5x more water than XPS, to absorbing over 7x more water than XPS.