TG66 Ballasted Roof System - Sarnavap 1000E and Sarnafil TG63-13

TG66 Ballasted Roof System - Sarnavap 1000E and Sarnafil TG63-13

Third party certifications:
  • BBA Agrément Certificate

    BBA Agrément Certificate

    Certificate type

Sika Sarnafil

Single-ply roofing system for ballasted warm roofs.

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Flexible Polyolefine (FPO) single-ply roofing system for ballasted warm roofs and inverted roofs.

System includes:

  • Stone ballast/precast concrete flag surface protection (supplied by others).
  • Sarnafil TG63-13 upper protective layer.
  • Sarnafil TG66 waterproof membrane.
  • SarnaTherm G insulation.
  • Sarnavap 1000E vapour control layer.

- Upper protective layer:

A protection sheet based on flexible polyolefins (FPO) with inlay of glass non-woven containing flame retardant.

- Waterproof membrane:

Sarnafil TG66 membranes are manufactured using a specially developed in line extrusion coating process. This coats both sides of the glass-fibre carrier simultaneously with a compounded Flexible Polyethylene to produce a dynamically stable membrane, which is suitable for adhered and loose laid ballasted 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 EN 13166; with mineral tissue facing. Available in uniform thickness or tapered.

- Vapour control layer:

A 0.20 mm thick, polyethylene based, vapour control layer. Sarnavap 1000E is manufactured from low density polyethylene, blended to produce a vapour control layer that is flexible when cold, resistant to chemicals and ageing and rot proof. It is suitable for use in most mechanically fastened systems using both Sarnafil PVC & FPO membranes. Not suitable for high humidity applications or under green roofs.


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


- Upper protective layer:

Loosely laid with the jointing method below:Overlap the sheets by 80 mm and hot air weld with a hand welder or the Sarnamatic automatic welder.

- Waterproof membrane:

Sarnafil TG66 is intended to be loose-laid and ballasted. Installation is carried out by Sarnafil contractors, who are specifically trained in the installation requirements of Sarnafil T membranes.

- Insulation:

SarnaTherm G can be attached to the substrate (deck or suitable vapour control layer) by mechanically fastening with SBT tubes and SBIW-70x70 pressure plates. SarnaTherm G can be loose laid if sufficient ballast weight is provided immediately to resist wind uplift pressures.

A vapour control layer will be required when SarnaTherm G 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 fleece should be used as cushioning layer.

General information

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

TG66 Ballasted Roof System - Sarnavap 1000E and Sarnafil TG63-13


Not required

Primer 501

Waterproof membrane



Sarnafil TG66


1.5 mm

1.8 mm

2.0 mm


RAL 7040 Window grey


Loose laid




SarnaTherm G

SarnaTherm G Tapered


Consult Sika Sarnafil for recommendations and details.


Loose laid

Upper protective layer

Sarnafil TG63-13

Vapour control layer



Sarnavap 1000E


Loose laid


Double LT rainwater outlets

Sarnafil T clean

Sarnafil T prep

Sarnafil Type T

Sarnametal T

Sarnaplast 2235

Sarnavap jointing tape

TG/TS rainwater outlets

Standard product features

Upper protective layer:

- Surface:


- Colour top/bottom surface:

Greenish/ dark grey.

- Roll size (l x w):

25 x 2 m.

- Thickness:

1.3 mm.

- Roll weight:

65 kg.

- Reaction to fire to BS EN 11925-2 (classification to BS EN 13501-1):


- Tensile strength:

≥ 6 N/ mm².

Waterproof membrane:

- Width:

2.0 m.

- Length of roll:

20 m (15 m for 1.8 mm thick membrane).

- Weight:

  • 1.2 mm thick: 1.50 kg/m².
  • 1.5 mm thick: 1.80 kg/m².
  • 1.8 mm thick: 2.00 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:

Low density polyethylene (LDPE).

- Dimensions:

  • Thickness: 0.20 mm.
  • Width: 5.0 m.
  • Roll width: 1.3 m.
  • Roll length: 25 m.

- Weight:

0.192 kg/m².

- Colour:

Blue (opaque).

- Performance:

Water vapour resistance: >800 MNs/g.

Product Options

Waterproof membrane:

- Colour:

Available in standard colours. Other Colours may be available, subject to a lead time and minimum order quantities.


  • 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.
  • Sarnafil Type T fleece: For use with Sarnavap 1000E VCL.
  • 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 1000E VCL.
  • TG/TS rainwater outlets: Injection moulded FPO outlets and scuppers.

Third party certifications
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