Is polyisocyanurate a good insulator?

Is polyisocyanurate a good insulator?

Polyisocyanurate insulation is a rigid, closed cell, continuous foam board insulation. Excellent performance in fire tests for both roof and wall applications; polyiso meets the strict standard of both FM Class 1 Approvals (FM 4450/4470), UL 1256, CAN/ULC S126M and NFPA 285 testing.

What is the R-value of polyisocyanurate insulation?

of polyisocyanurate will be R-22.4 (RSI-3.95), regardless of how many layers are used.

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 ASTM C1289?

ASTM C1289, Standard Specification for Faced Rigid Cellular Polyisocyanurate Thermal Insulation Board, differentiates products and their respective performance by designating Types. Facers can be flexible or rigid and can play a significant role in the performance of the finished product.

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.

How thick is Polyiso 30?

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.

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 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.

Where is polyiso insulation made?

The manufacturing members of PIMA operate 36 facilities in Canada and the United States that produce a variety of polyiso insulation products.

How thick is polyiso?

Polyiso roof insulation is typically manufactured in incremental thicknesses from 0.5” to 4.5” with versatile options for meeting energy code requirements.

What are the different types of polyiso insulation?

POLYISO INSULATION CLASSIFICATION. There are two important standards for polyiso thermal insulation; these are CAN/ULC-S704 and ASTM C-1289. Each standard uses some or all of the following wording to describe the different types of thermal insulation products; “Type”, “Class” and “Grade”.

What is the fire rating of polyisocyanruate?

RESISTA 1˝ polyisocyanruate insulation board has a UL Class A rating for fire resistance when used over combustible decks and is compatible with single-ply and modified bitumen roofing systems. Competitors may require up to 3.1˝ of insulation to achieve comparable ratings. thE BEst Polyiso insulation BoaRD just got BEttER.

What are the properties of polyiso boards?

In addition, the properties of polyiso boards, such as water absorption, vapor permeance, strength, and dimensional stability may vary depending on the exact composition of a given type of facer. However, in all cases the final product shall always meet the requirements of ASTM C1289 Standard Specification.

What is astastm c1289 polyiso classification?

ASTM C1289 Polyiso Classification: Type II, Class 2 or Class 4 Description: CGF is composed of coated, polymer bonded fibrous glass mats bonded with organic polymer binders and coated with organic polymer, clay, or other inorganic substances.