Product Data Sheet
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Sarnatherm® ISO

Sarnatherm® ISO

RIGID CLOSED CELL POLYISOCYANURATE INSULATION BOARD

Sarnatherm® ISO is a rigid closed cell polyisocyanurate insulation board with fibre-reinforced felt facers, suitable for use in new construction and re-roofing with Sarnafil® or Sikaplan® membranes.

  • Manufactured with no CFCs or HCFCs
  • Virtually no GWP (global warming potential)
  • Zero ODP (ozone depletion potential)
  • Compatible with Sarnafil and Sikaplan membranes
Product Data Sheet
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Usage

Wherever insulation is required within a conventional roof assembly to achieve specified thermal resistance. Areas of Application
  • New roofs
  • Recover roofs
  • Mechanically-Attached Systems
  • Adhered Systems
 

Advantages

  • Manufactured with no CFCs or HCFCs
  • Virtually no GWP (global warming potential)
  • Zero ODP (ozone depletion potential)
  • Compatible with Sarnafil and Sikaplan membranes

Packaging

1.2 m x 1.2 m (4 ft x 4 ft)
1.2 m x 2.4 m (4 ft x 8 ft)

Product Details

Sustainability / Certifications / Approvals

APPROVALS / CERTIFICATES

  • ASTM C 1289 Type II, Class 1, Grade 2 (138 kPa (20 psi))
  • ASTM C 1289 Type II, Class 1, Grade 3 (172 kPa (25 psi))
  • ULC S704, Type 2, Class 3 (138 kPa (20 psi))
  • ULC S704, Type 3, Class 3 (172 kPa (25 psi))
  • UL 1256, 790, 263
  • ULC S126, S101, S107
  • FM 4450, 4470
  • Miami-Dade County
  • Florida Building Code
  • CSA-A123.21
Product Information

Composition / Manufacturing

Polyisocyanurate foam core with fibre reinforced felt facers

Shelf Life

Not applicable

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 102 mm (4 in) 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.

Thickness

LTTR Value*

Thickness

Flute Spanability

5.7

25.4 mm (1.0")

50.8 mm (2-5/8")

8.6

38.1 mm (1.5")

101.6 mm (4-3/8")

10.3

45.72 mm (1.8")

101.6 mm (4-3/8")
11.450.8 mm (2.0")101.6 mm (4-3/8")
14.463.5 mm (2.5")101.6 mm (4-3/8")
15.066.04 mm (2.6")101.6 mm (4-3/8")
17.476.2 mm (3.0" **)101.6 mm (4-3/8")
20.588.9 mm (3.5" **)101.6 mm (4-3/8")
23.6101.6 mm (4.0" **)101.6 mm (4-3/8")

*LTTR Values were determined in accordance with CAN/ULC-S770-09. Test samples were third‐party selected and tested by an accredited material testing laboratory. The LTTR results were reviewed by FM Global and certified by the PIMA Quality Mark Program.
**Use multiple layers when the total desired or specified R‐value requires an insulation thickness greater than 68.58 mm (2.7 in).
Technical Information

Compressive Strength

138 kPa (20 psi)

172 kPa (25 psi)

(ASTM D1621)

Dimensional Stability

< 2 %

(ASTM D2126)

Service Temperature

‐73 - 121oC (‐100 - 250oF)
 

Water Absorption

< 1.5 %

(ASTM C209)

Permeability to Water Vapour

 < 85.5 ng/(Pa·s·m2)), (1.5 perm)

(ASTM E84)

Reaction to Fire

Flame Spread

25-60**

Smoke Development

50-170**

**Numerical ratings are not intended to reflect performance under actual fire conditions. Flame spread index of ≤75 and smoke development ≤450 meet code requirements for foam plastic roof insulation. Codes exempt foam plastic insulation when used in FM 4450, UL 1256, ULc S126.

Application

Application steps

APPLICATION INSTRUCTIONS

Sarnatherm® ISO is installed by a Sika Canada Authorized Applicator. Sarnatherm® ISO may be installed by mechanical attachment to the roof deck with Sarnafasteners and Sarnaplates and/or by attachment with Sarnacol board adhesive depending on project requirements and specifications. Roof insulation which has become wet or damaged should be removed and replaced with solid, dry insulation. Contact Sika Canada for alternative methods of attachment.

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