Sarnafil® TS 77-20

• Conformity with LEED v4 SSc 5 (Option 1): Heat Island Reduction - Roof (only traffic white)
• Conformity with LEED v4 MRc 2 (Option 1): Building Product Disclosure and Optimization - Environmental Product Declarations
• Conformity with LEED v4 MRc 3 (Option 2): Building Product Disclosure and Optimization - Sourcing of Raw Materials
• Conformity with LEED v4 MRc 4 (Option 2): Building Product Disclosure and Optimization - Material Ingredients
• Conformity with LEED v2009 SSc 7.2 (Option 1): Heat Island Effect - Roof
• Conformity with LEED v2009 MRc 4 (Option 2): Recycled Content
• IBU Environmental Product Declaration (EPD) available

• CE Marking and Declaration of Performance to EN 13956 - Polymeric sheets for roof waterproofing
• Compliance test Sarnafil® G 410-TS-77, FM Approvals, Certificate No. 3047304

EN 13956

Flexible polyolefins (FPO)

5 years from date of production.

Product must be stored in original unopened and undamaged sealed packaging in dry conditions and temperatures between +5 °C and +30 °C. Store in a horizontal position. Do not stack pallets of the rolls on top of each other, or under pallets of any other materials during transport or storage. Always refer to packaging.

The following products must be considered for use depending on roof design:

• Sarnafil® T 66-15 D Sheet for detailing
• Sarnafil® TS 77 strips
• Sarnafil® T Metal Sheet
• Sarnafil® T Welding Cord
• Sarnabar® / Sarnafast®
• Sarnafil® T Prep / Sarnafil® T Wet Task Set
• Sarnacol® T 660
• Solvent T 660
• Sarnafil® T Clean

Wide range of accessories is available e.g. prefabricated parts, roof drains, scuppers, walkway pads and decor profiles.

Sarnafil® TS 77-20 may be installed on all thermal insulations and levelling layers suitable for roofing. No additional separation layer is required.
Sarnafil® TS 77-20 is suitable for installation directly on top of existing, carefully cleaned, levelled bituminous roofing, e.g. re-roofing over old flat roofs. Colour changes in membrane surface may occur if in direct contact with bitumen.

¹⁾ md = machine direction
²⁾ cmd = cross machine direction

¹⁾ md = machine direction
²⁾ cmd = cross machine direction

¹⁾ md = machine direction
²⁾ cmd = cross machine direction

¹⁾ md = machine direction
²⁾ cmd = cross machine direction

CRRC tested products are listed in Cool Roof Rating Council (CRRC) product data base.

- 20 °C min. / + 60 °C max.

- 30 °C min. / + 60 °C max.

Hot welding overlap seams Electric hot air welding equipment, such as hand held manual hot air welding equipment and pressure rollers or automatic hot air welding machines with controlled hot air temperature capability of a minimum 600 °C. Recommended type of equipment:
Manual: Leister Triac
Automatic: Sarnamatic 681
Semi-automatic: Leister Triac Drive

The substrate surface must be uniform, smooth and free of any sharp protrusions or burrs, etc. Sarnafil® TS 77-20 must be separated from any incompatible substrates / materials by an effective separation layer to prevent accelerated ageing. The supporting layer must be compatible to the membrane, solvent resistant, clean, dry and free of grease and dust. Metal sheets must be degreased with Solvent T 660 before adhesive
is applied.

Installation procedure
Reference must be made to further documentation where applicable, such as relevant method statement, application manual and installation or working instructions.

Fixing method- General

The waterproofing membrane is installed by loose laying ( without stretching membrane or installing under tension) with mechanical fastening in seam overlaps or independent from overlaps. Overlap seams are hot welded using specialised hot air equipment.

Fixing method-Linear fastening (Sarnabar®)

Unroll the Sarnafil® TS 77-20 membrane, overlap by 80 mm, weld immediately and fix to the substructure by means of the Sarnabar® fasteners. The preferred type of fastening will be advised by Sika. The spacing of the fasteners is in accordance with the project specific Sika calculations. The perimeter piece ends must be secured with the Sarnabar® Load Distribution Plate. For protection fasten a piece of Sarnafil® TS 77-20 under bar end and plate. Leave a 10 mm clearance between bar ends. Do not fasten in hole nearest bar end. Cover the bar ends with a piece of Sarnafil® TS 77-20 and weld. After installation the Sarnabar® must immediately be made watertight with a Sarnafil® TS 77-20 cover strip. At upstands and at all penetrations, the Sarnafil® TS 77-20 membrane must be secured with a Sarnabar®. The 4 mm diameter S-Welding Cord protects the Sarnafil® TS 77-20 roof covering against tearing and peeling off by wind uplift.

Fixing method-Spot fastening (Sarnafast®)

Sarnafil® TS 77-20 must always be installed at right angles to the deck direction. Sarnafil® TS 77-20 is fixed by means of the Sarnafast® fasteners and barbed washers/tubes along the marked line, 35 mm from the edge of the membrane. Sarnafil® TS 77-20 is overlapped by 120 mm. The spacing of the fasteners is in accordance with the project specific Sika calculations. At upstands and at all penetrations, the Sarnafil® TS 77-20 membrane must be secured with a Sarnabar ®. The 4 mm diameter S-Welding Cord protects the Sarnafil® TS 77-20 roof covering against tearing and peeling off by wind uplift.

Hot welding method
Overlap seams must be welded by electric hot welding equipment. Welding parameters including temperature, machine speed, air flow, pressure and machine settings must be evaluated, adapted and checked on site according to the type of equipment and the climatic conditions prior to welding.

Testing overlap seams
The seams must be mechanically tested with screw driver to ensure the integrity/completion of the weld. Any imperfections must be rectified by hot air welding.