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TS77 Mechanically Fastened Roof System - Sarnavap 5000E SA

TS77 Mechanically Fastened Roof System - Sarnavap 5000E SA

Third party certifications:
  • BBA Agrément Certificate

    BBA Agrément Certificate

    Certificate type

Sika Sarnafil

Mechanically fastened roof covering system.

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

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

System includes:

  • Sarnafil TS77 waterproof membrane.
  • SarnaTherm S insulation.
  • Sarnavap 5000E SA vapour control layer.

- 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.

- Insulation:

Rigid polyisocyanurate foam insulation boards to BS 13166; with foil facing. Available in uniform thickness or tapered.

- Vapour control layer:

A 0.60 mm thick, high-performance, self-adhesive vapour control layer, manufactured from polymer modified bitumen, with glass fibre reinforcement and aluminium foil top layer. Suitable for use in high humidity environments, green roofing systems, loose-laid ballasted warm roof systems and all adhered and mechanically fastened systems. Can be used as a temporary waterproof layer for up to 4 weeks, in strict accordance with the product data sheet.


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.

- Insulation:

SarnaTherm S can be attached to the substrate (deck or suitable vapour control layer) by mechanically fastening with SBT tubes and SBIW-70x70 pressure plates.

A vapour control layer will be required when SarnaTherm S is used.

- Vapour control layer:

Loose laid over any smooth surface with all side and end laps overlapped a minimum 80 mm, then sealed with Sarnavap jointing tape. At parapets and upstands, Sarnavap must be carried up to the upper edge of the thermal insulation and sealed to the upstand/ penetration with SarnaVap jointing tape, to form an airtight seal. When installed vertically, Sarnavap must be mechanically fastened along its top edge.

If the surface is rough, a layer of Sarnafil Type T should be used as cushioning layer.

General information


All Sarnafil systems are subject to a project specific specification (including design against wind uplift) to be completed by Sika Sarnafil. Please contact your local Sarnafil Technical Adviser


Sarnafil single point, insurance backed, guarantees provide cover for all Sarnafil products supplied by Sika and branded Sarnafil products supplied by Sarnafil Partner suppliers

Uniclass 2015

Ss_30_40_30_80 Single layer sheet warm roof covering systemsPrimary


J42/10 Warm deck roof covering

J42/110 Warm deck roof covering

Specification data - Single layer sheet warm roof covering systems

Product Reference

TS77 Mechanically Fastened Roof System - Sarnavap 5000E SA


Not required

Primer 110

Primer 600

Spray primer 610

Waterproof membrane



Sarnafil TS77


1.5 mm

1.8 mm


RAL 7040 Window grey


Mechanically Fastened




SarnaTherm S


Mechanically Fastened

Vapour control layer



Sarnavap 5000E SA




Double LT rainwater outlets

Sarnafil T clean

Sarnafil T prep

Sarnametal T

Sarnaplast 2235

Sarnavap jointing tape

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.


  • Low thermal conductivity: 0.027 W/mK (thicknesses <80 mm), 0.026 W/mK (thicknesses from 80–120 mm) and 0.025 W/mK (thicknesses >120 mm).
  • Compressive strength >150 kPa at 10% deformation.
  • Typical Density of 32 kg/m³.
  • <5% smoke emission when tested to BS 5111-1.
  • CFC/ HCFC-free.
  • Zero ozone depletion potential (ODP).
  • Class O fire rating.

Vapour control layer:

- Material:

Bitumen with aluminium foil top side.

- Dimensions:

  • Thickness: 0.60 mm.
  • Width: 1.08 m.
  • Roll width: 1.08 m.
  • Roll length: 30 m.

- Weight:

0.7 kg/m².

- Colour:

Grey metallic.

- Performance:

Water vapour resistance: >9000 MNs/g.

Product Options


  • Double LT rainwater outlets: Insulated outlets.
  • 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.
  • Sarnavap jointing tape: For use with Sarnavap 5000E SA VCL.
  • TG/TS rainwater outlets: Injection moulded FPO outlets and scuppers.

Digital objects
PlatformCompatibleVersionCertified to
IFC2X3 4 1.3
- 1.0
Revit 2016 6 2.0
- 1.0
- 2
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