Product Data Sheet Safety Data Sheet Show all documents

Sarnatherm® Roof Board-A FR

Sarnatherm Roof Board-A FR is a high-density polyisocyanurate roof board

Sarnatherm® Roof Board-A FR is a lightweight, high-density polyisocyanurate roof board with coated glass facers. Sarnatherm® Roof Board-A FR is suitable for use in new construction and recover roof applications with Sarnafil® or Sikaplan® roof membranes. The coated glass facers provide strong, smooth surfaces suitable for mechanically attached or adhered applications.

  • Achieves a UL 790 Class A combustible deck assembly rating without the use of a fire-rated slip sheet or the presence of a fire barrier
  • Lightweight for easy hoisting, staging and maneuvering
  • High impact and flexural strength
  • Easy scoring, cutting and snapping
  • Improved coverage rates in adhered systems
  • Contains no CFC’s, HCFC's, HFC’s
  • Zero Ozone Depletion Potential (ODP)
  • Virtually no Global Warming Potential (GWP)
Product Data Sheet Safety Data Sheet Show all documents

Usage

Used as a lightweight roof board in conventional roof assemblies.   AREAS OF APPLICATION
  • New Roofs
  • Recover Roofs
  • Mechanically Attached Systems
  • Adhered Systems
 

Advantages

  • Achieves a UL 790 Class A combustible deck assembly rating without the use of a fire-rated slip sheet or the presence of a fire barrier
  • Lightweight for easy hoisting, staging and maneuvering
  • High impact and flexural strength
  • Easy scoring, cutting and snapping
  • Improved coverage rates in adhered systems
  • Contains no CFC’s, HCFC's, HFC’s
  • Zero Ozone Depletion Potential (ODP)
  • Virtually no Global Warming Potential (GWP)

Packaging

  • 4 ft x 4 ft (1.2 m x 1.2 m), 8 lbs (3.7 kg) per board, 36 boards per bundle
  • 4 ft x 8 ft (1.2 m x 2.4 m), 16 lbs (7.3 kg) per board, 36 boards per bundle
  • 0.625" (15.9 mm) thickness

Colour

Off-white core with white facers

Product Details

Sustainability / Certifications / Approvals

APPROVALS / STANDARDS

  • ASTM C 1289, Type II, Class 4, Grade 1
  • FM Approved
  • UL Classified 790
  • UL Canada Classified

 
Product Information

Chemical Base

Polyisocyanurate foam core with coated glass facers

Recycled Content

6% Pre-consumer

Shelf Life

N/A

Storage Conditions

Factory-applied packaging is intended only for protection during transit.

When stored outdoors or on the job site, the insulation should be stacked on pallets at least 4" (102 mm) above ground level and completely covered with a weatherproof covering such as a tarpaulin.

The temporary factory-applied packaging should be slit or removed to prevent accumulation of condensation. Refer to PIMA Technical Bulletin #109: Storage and Handling Recommendations for Polyiso Roof Insulation.
Technical Information

Compressive Strength

80 psi (551 kPa) minimum, up to 110 psi (758 kPa)

(ASTM D-1621)

Flexural Strength

> 2000 psf (95 kPa)

(ASTM D-1623)

Dimensional Stability

Thickness < 4%, Length & Width < 1%

(ASTM D-2126)

Reaction to Fire

Flame Spread1: < 75

Smoke Developed1: < 450

(ASTM E-84)

1 Meets the requirements of the IBC code. For specific Flame Spread or Smoke Developed Ratings - please contact the Sika Corporation – Roofing Technical Department.

Thermal resistance

2.5

(ASTM C-518)

Permeability to Water Vapor

< 1.5 perm (85 ng/(Pa∙s∙m2))

(ASTM E-96)

Water Absorption

< 4%

(ASTM C-209)

Service Temperature

-100°F to 250°F (-73°C to 121°C)

Application

Application steps

APPLICATION INSTRUCTIONS

Sarnatherm® Roof Board-A FR is installed by a Sika Authorized Applicator. Sarnatherm® Roof Board-A FR may be installed by mechanical attachment to the roof deck with approved fasteners and insulation plates or by attachment with Sarnacol board adhesive depending on project requirements and specifications. Roof boards that have become wet or damaged should be removed and replaced with solid, dry roof boards.

Contact Sika Corporation – Roofing Technical Department regarding alternative methods of attachment.

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