Sika Sarnafil Insulation/Roof Boards - Sarnatherm® XPS

Rigid extruded polystyrene insulation board

Sarnatherm® XPS is a rigid extruded polystyrene insulation board that can be used in either a Sika roofing or waterproofing application.

• Low water absorption
• Available in various sizes

Usage

Wherever insulation is required within a conventional roof assembly or waterproofing application. AREAS OF APPLICATION

• New Roofs
• Recover Roofs
• Mechanically Attached Systems
• Adhered Systems
• Waterproofing Systems

Advantages

• Low water absorption
• Available in various sizes

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

Product Details

Sustainability / Certifications / Approvals

APPROVALS / STANDARDS

• ASTM C 578, Type XII, X, XIII, IV, VI, VII, V
• CAN/ULC S701, Type 4

Product Information

Chemical Base

Polystyrene foam core with a smooth skin surface on the face and back surfaces

Shelf Life

N/A

Storage Conditions

When stored outdoors, the insulation should be stacked on pallets at least 4” (102 mm) above the surface level and protected from exposure to direct sunlight and weather using an opaque, light-colored tarpaulin. Do not use a dark colored tarpaulin. The factory applied packaging is intended only for protection during transit and should only be slit enough to prevent accumulation of condensation then removed prior to immediate use. Insulation that becomes wet or damaged should be removed and replaced with dry insulation

Technical Information

Application

Application Steps

APPLICATION INSTRUCTIONS

Sarnatherm XPS is installed either under or over the Sika roofing/waterproofing membrane depending on the system design. Overburden is utilized to hold the insulation in place in a waterproofing application. Polystyrene should not come in contact with PVC. Always place a separation layer such as Sarnafelt NWP between the Sarnatherm XPS and the membrane in both roofing and waterproofing applications. During installation in hot, sunny weather, protect the insulation with a white covering to prevent excessive heat build‐up and potential warping.

If the compressive strength of the EPS board is less than 20 psi, then a gypsum cover board must be installed over the board for load distribution and resistance purposes.

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