Paratherm is a rigid, high-thermal-value roof insulation board composed of a closed cell polyisocyanurate foam core bonded to fiberglass reinforced facers for use over metal, nailable, and non-nailable roof decks. Paratherm polyisocyanurate products are offered in a variety of compression strengths, facer types, and configurations to provide:

Energy savings
Fire resistance
Sustainability
Moisture resistance

Paratherm G

Rigid roof insulation boards comprised of a closed cell polyisocyanurate foam core bonded on each side to a fiber-reinforced organic felt facer.

Slope Variations

Flat and Tapered
Grade

Grade 2 (20 psi) and Grade 3 (25 psi)

Paratherm G Tapered

Sloped rigid roof insulation boards comprised of a closed cell polyisocyanurate foam core bonded on each side to a fiber-reinforced organic felt facer.

Grade

Grade 2 (20 psi) and Grade 3 (25 psi)

Paratherm G CG

Rigid roof insulation boards comprised of a closed cell polyisocyanurate foam core bonded on each side to a coated fiberglass facer.

Slope Variations

Flat and tapered
Grade

Grade 2 (20 psi) and Grade 3 (25 psi)

Paratherm G CG Tapered

Rigid roof insulation boards comprised of a closed cell tapered polyisocyanurate foam core bonded on each side to a coated fiberglass facer.

Grade

Grade 2 (20 psi) and Grade 3 (25 psi)

Paratherm NH

An environmentally friendly option, non-halogenated polyiso is TCPP-Free/Red List-Free and qualifies for sustainable certifications. Comprised of a closed cell polyisocyanurate foam core bonded on each side to a fiber-reinforced organic felt facer.

Grade

Grade 2 (20 psi) and Grade 3 (25 psi)

Paratherm NH Tapered

An environmentally friendly option, non-halogenated polyiso is TCPP-Free/Red List-Free and qualifies for sustainable certifications. Comprised of a closed cell tapered polyisocyanurate foam core bonded on each side to a fiber-reinforced organic felt facer.

Grade

Grade 2 (20 psi) and Grade 3 (25 psi)

Paratherm NH CG

Grade

Grade 2 (20 psi) and Grade 3 (25 psi)

Paratherm NH CG Tapered

Grade

Grade 2 (20 psi) and Grade 3 (25 psi)

Paratherm Barrier

A polyiso option with greater fire resistance, this option provides an ANSI/UL 790 Class A Roofing Fire Resistance Rating over combustible decks with a 1/2" (12.7 mm) board thickness. Comprised of a closed cell polyisocyanurate foam core bonded on each side to a coated fiberglass facer.

Grade

Grade 2 (20 psi) and Grade 3 (25 psi)

Contractors installing tapered polyiso flat roof insulation.

Tapered insulation design resources

Rely on your dedicated Siplast tapered insulation design specialist for detailed, high-quality configurations that help you deliver on every project. We provide custom tapered solutions for both polyiso insulation and expanded polystyrene insulation to optimize performance across the roof.

Explore tapered design resources Email tdg@siplast.com

Engineer working at a desk with blueprints and a computer, representing a resource for precise assembly via a detail drawing library.

Your resource for precise assembly

Looking for more in-depth information about the assembly process? This video provides a comprehensive overview, but for precise measurements, material specifications, and intricate connections, please consult the Detail Drawings Library. You'll find all the critical data needed to ensure a compatible assembly.

Detail drawing library