A fully adhered system will typically consist of a structural deck, adhered vapour control layer, adhered thermal insulation and adhered Sarnafil G410-EL or Sarnafil G410-ELF membrane. The type of membrane chosen will generally be determined by the level of aesthetic requirement, as G410-ELF felt-backed membrane masks more surface irregularities.


The vapour control layer is generally a bitumen based product such as Sarnavap 5000E SA self adhesive vcl, or a traditional bituminous felt vapour control layer (3B, 5U etc) adhered to the substrate using synthetic cold bitumen or hot bitumen (if insurance permits the use of this method), with all overlapping joints sealed.


A suitable thermal insulation board, for use in adhered systems, must be selected from Sika Sarnafil document ‘Insulation Boards for use with Sarnafil Adhered Systems’. In systems where a single point guarantee is required, SarnaTherm insulation must be used. The selected thermal insulation board is then attached to the substrate with Sarnacol 2162 PU adhesive, synthetic cold bitumen or hot bitumen.


Finally, the membrane is adhered to the surface of the insulation board, using either Sarnacol 2170 or Sarnacol 2142s (fleece-backed membrane only) adhesive. A mechanically fastened peelstop is installed at all perimeters, penetrations and direction changes, to protect areas vulnerable to wind uplift and minimises the risk of delamination under wind load.

G410-EL Membrane

Sarnafil G410-EL is a multi-layer, synthetic roof waterproofing sheet based on premium-quality polyvinyl chloride (PVC) with inlay of glass non-woven containing ultraviolet light stabilizers and flame retardants. Sarnafil G410-EL is a hot air weldable roof membrane, formulated for direct exposure and designed to use in all global climatic conditions. Sarnafil G410-EL is produced with an integral glass non-woven carrier for dimensional stability.


Sarnafil G410-EL is the Sarnafil roof membrane which can be used for Ballasted membrane systems. Sarnafil G410-EL has a unique lacquer coating applied to the top of the membrane to resist staining from airborne dirt and pollutants. Sarnafil G410-EL has no built-in stress at the time of production and has a fully encapsulated carrier with no risk to delamination or water-wicking. The dimensional stability of Sarnafil G410-EL is excellent. Sarnafil G 410-EL is available in a variety of colours and thicknesses.


Product Data Sheets

G410-12EL - 1.2mm thick

G410-15EL - 1.5mm thick

G410-18EL - 1.8mm thick

G410-20EL - 2.0mm thick


Declaration Of Performance

G410-12EL - 1.2mm thick

G410-15EL - 1.5mm thick

G410-18EL - 1.8mm thick

G410-20EL - 2.0mm thick

G410-EL Adhered Roof System - Sarnavap 500E

10, 15, 20 & 25 year adhered roof covering system:

  • Sarnafil G410-EL waterproof covering.
  • SarnaTherm G insulation.
  • Sarnavap 500E vapour control layer.

G410-EL Adhered Roof System - Sarnavap 1000E

10, 15, 20 & 25 year adhered roof covering system:

  • Sarnafil G410-EL waterproof covering.
  • SarnaTherm G insulation.
  • Sarnavap 1000E vapour control layer.

G410-EL Adhered Roof System - Sarnavap 5000E SA

10, 15, 20 & 25 years adhered roof covering system:

  • Sarnafil G410-EL waterproof covering.
  • SarnaTherm G insulation.
  • Sarnavap 5000E SA vapour control layer.


G410-ELF Membrane

Sarnafil G410-ELF (Felt) is a multi-layer, synthetic roof waterproofing sheet based on premium-quality polyvinyl chloride (PVC) with inlay of glass non-woven and with a 300g/m² polyester fleece backing.


G410-ELF contains ultraviolet light stabilizers and flame retardants. Sarnafil G410-ELF is a hot air weldable roof membrane, formulated for direct exposure and designed to use in all global climatic conditions. Sarnafil G410-ELF (Felt) is produced with an integral glass non-woven carrier for dimensional stability. Sarnafil G410-ELF is the Sarnafil roof membrane used with the Adhered System.


Sarnafil G410-ELF has a unique lacquer coating applied to the top of the membrane to resist staining from airborne dirt and pollutants. Sarnafil G410-ELF has no built-in stress at the time of production and has a fully encapsulated carrier with no risk of delamination or water-wicking. The dimensional stability of Sarnafil G410-ELF is excellent. Sarnafil G410-ELF is available in a variety of colours and thicknesses.


Product Data Sheets

G410-12ELF - 1.2mm thick

G410-15ELF - 1.5mm thick

G410-18ELF - 1.8mm thick


Declaration Of Performance

G410-12ELF - 1.2mm thick

G410-15ELF - 1.5mm thick

G410-18ELF - 1.8mm thick

G410-ELF Adhered Roof System - Sarnavap 500E

10, 15, 20 & 25 years adhered roof covering system:

  • Sarnafil G410-ELF waterproof covering.
  • SarnaTherm G insulation.
  • Sarnavap 500E vapour control layer.

G410-ELF Adhered Roof System - Sarnavap 1000E

10, 15, 20 & 25 years adhered roof covering system:

  • Sarnafil G410-ELF waterproof covering.
  • SarnaTherm G insulation.
  • Sarnavap 1000E vapour control layer.

G410-ELF Adhered Roof System - Sarnavap 5000E SA

10, 15, 20 & 25 years adhered roof covering system:

  • Sarnafil G410-ELF waterproof covering.
  • SarnaTherm G insulation.
  • Sarnavap 5000E SA vapour control layer.

Below Ground Waterproofing?

Do you require below ground waterproofing solutions? Click here to visit the Sika Waterproofing Solutions website