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Sarnafil TS77 Mechanically Fastened Cold Roof System

Sarnafil TS77 Mechanically Fastened Cold Roof System

Third party certifications:
  • BBA Agrément Certificate

    BBA Agrément Certificate

    Certificate type

Sika Sarnafil

Flexible Polyolefine (FPO) single-ply waterproof membrane with fire retardant.

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+44 (0)1707 394444 www.sarnafil.co.uk

Flexible Polyolefine (FPO) single-ply system with non-halogenated fire retardant, designed for mechanical fastening on warm roofs.

System (can) include:

  • Sarnafil TS77 (FPO) waterproof membrane.
  • Optional Sarnafil Type T or A fleece as cushion layer, mechanically fixed.

- Waterproof membrane:

Sarnafil TS77 membranes are manufactured using a specially developed in line extrusion coating process. This coats both sides of a polyester scrim carrier simultaneously with a compounded Flexible Polyethylene and produces a dynamically stable membrane that can accommodate the tensile stresses imposed by mechanically fastened applications.

The process enables between 2% and 5% of recycled material to be used in the production of new membranes.

- Fleece (cushion layer):

A polypropylene fleece used either as a protective layer below the waterproof liner or as a protective layer on top of the liner.

  • Sarnafil Type A: Is not UV stabilised and must not be subjected to external weather conditions for prolonged periods of time.
  • Sarnafil Type T: UV stabilised, can be left exposed to weathering.


Certified by BBA to have a life expectancy in excess of 25 years.


- Waterproof membrane:

Sarnafil TS77 is intended to be mechanically fastened using the Sarnafast or Sarnabar systems. Installation is carried out by Sarnafil contractors, who are specifically trained in the installation requirements of Sarnafil T membranes.

- Fleece (cushion layer):

Sarnafil Type A and Type T:

Sarnafil Type A and Type T are generally loose laid, but can be partially bonded to the substrate with Sarnacol 2170 or Sarnacol 2172 if required. In either application, all edges must be overlapped by at least 100 mm.

General information

Uniclass 2015

Ss_30_40_30_78 Single layer sheet cold roof covering systemsPrimary


J42/130 Cold deck roof covering

Specification data - Single layer sheet cold roof covering systems

Product Reference

Sarnafil TS77 Mechanically Fastened Cold Roof System


Not required

Primer 110

Waterproof membrane



Sarnafil TS77 (FPO)


1.5 mm

1.8 mm


RAL 7040 Window grey


Mechanically Fastened


Not required

Sarnafil Type A

Sarnafil Type T


Sarnafil T clean

Sarnafil T prep

Sarnametal T

Sarnaplast 2235

TG/TS rainwater outlets

Standard product features

Waterproof membrane:

- Width:

2.0 m.

- Length of roll:

  • 1.2 mm thick: 25 m.
  • 1.5 mm thick: 20 m.
  • 1.8 mm thick: 15 m.

- Weight:

  • 1.2 mm thick: 1.52 kg/m².
  • 1.5 mm thick: 1.77 kg/m².
  • 2.0 mm thick: 2.12 kg/m².

Fleece (cushion layer):

  • Size: 2 x 50 m.
  • Weight: 300 g/m².

Product Options


  • Primer 501: Surface primer creating a key for Sarnaplast 2235.
  • Sarnafil T clean: Cleaning agent.
  • Sarnafil T prep: Seam preparation for use prior to hot-air welding.
  • Sarnametal T: Galvanized metal sheet with Sarnafil T factory laminated to it, for use in prefabricate flashings and drip details.
  • Sarnaplast 2235: Elastic one-part silicone sealant for sealing edges and perimeter upstand flashing terminations.
  • TG/TS rainwater outlets: Injection moulded FPO outlets and scuppers.

Third party certifications
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