Product Data Sheet Safety Data Sheet Show all documents
Sarnatherm® ISO

Sarnatherm® ISO

Rigid closed cell polyisocyanurate insulation board

Sarnatherm® ISO is a rigid closed cell polyisocyanurate insulation board with fiber reinforced felt facers, and is 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 Safety Data Sheet Show all documents

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

  • 4 ft x 4 ft (1.2 m x 1.2 m)
  • 4 ft x 8 ft (1.2 m x 2.4 m)
  • Various Thicknesses

Color

Off‐white core with black facer

Product Details

Sustainability / Certifications / Approvals

APPROVALS / STANDARDS

  • ASTM C 1289 Type II, Class 1, Grade 2 (20 psi)
  • ASTM C 1289 Type II, Class 1, Grade 3 (25 psi)
  • UL 1256, 790, 263
  • FM 4450, 4470
  • Miami‐Dade County
  • Florida Building Code
 
Product Information

Chemical Base

Polyisocyanurate foam core with fiber reinforced felt facers

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.

Thickness

Thickness

LTTR Value*

Flute Spanability

1.0" (25 mm)

5.7

2-5/8"

1.5" (38 mm)

8.6

4-3/8"

1.75" (44 mm)10.04-3/8"

1.8" (46 mm)

10.3

4-3/8"
2.0" (51 mm)11.44-3/8"
2.2" (56 mm)12.64-3/8"
2.5" (64 mm)14.44-3/8"
2.6" (66 mm)15.04-3/8"
2.8" (71 mm)16.24-3/8"
3.0" (76 mm) 17.44-3/8"
3.1" (78 mm)18.04-3/8"
3.3" (84 mm)19.24-3/8"
3.5" (89 mm) 20.54-3/8"
3.8" (97 mm)22.34-3/8"
4.0" (102 mm)23.64-3/8"
4.25" (108 mm)25.24-3/8"
4.3" (109 mm)25.54-3/8"
4.5" (114 mm)26.84-3/8"

* LTTR (long term thermal resistance) values are based on ASTM C 1289. 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.
Technical Information

Compressive Strength

20 psi (138 kPa)
25 psi (172 kPa)

(ASTM D-1621)

Dimensional Stability

< 2 %

(ASTM D-2126)

Service Temperature

‐100 to 250°F (-73 to 121°C)

Permeability to Water Vapor

< 1.5 perm (85.5 ng/(Pa∙s∙m2))

(ASTM E-96)

Water Absorption

< 1.5 %

(ASTM C-209)

Reaction to Fire

Flame Spread: 25 – 60 *

Smoke Development: 50 – 170 *

(ASTM E-84)

*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 or UL 1256.

Application

Application steps

APPLICATION INSTRUCTIONS

Sarnatherm® ISO is installed by a Sika Authorized Applicator. Sarnatherm may be installed by mechanical attachment to the roof deck with Sarnafasteners and Sarnaplates, by attachment with Sarnacol board adhesive, or by hot asphalt 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 Corporation – Roofing Technical Department regarding alternative methods of attachment.

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