Product Data Sheet Show all documents

Sarnafil® G 476-20

Polymeric Membrane for ballasted Roof Waterproofing

Sarnafil® G 476-20 (thickness 2.0 mm) is a multi-layer, synthetic roof waterproofing sheet based on premium-quality polyvinyl chloride (PVC) with inlay of glass non-woven according to EN 13956. Sarnafil® G 476-20 is a hot air weldable roof membrane, formulated and designed to use in all global climatic conditions.

  • Specially formulated for below grade applications, including plaza decks, planters, foundations, balconies, terraces and split slab applications
  • Proven performance over decades
  • High dimensional stability due to glass fleece inlay
  • High water vapour permeability
  • Resistant to all common environmental influences
  • Resistant to mechanical influences
  • Resistant to micro-organisms
  • Resistant to root penetration
  • Hot air welding without use of open flames
  • Recyclable
Product Data Sheet Show all documents

Usage

Waterproofing membrane for roofs with ballast (e.g. concrete slabs, green roof (intensive, extensive), terraces with pedestrian traffic):
  • Green roofs
  • Utility roofs
  • Inverted roofs
 

Advantages

  • Specially formulated for below grade applications, including plaza decks, planters, foundations, balconies, terraces and split slab applications
  • Proven performance over decades
  • High dimensional stability due to glass fleece inlay
  • High water vapour permeability
  • Resistant to all common environmental influences
  • Resistant to mechanical influences
  • Resistant to micro-organisms
  • Resistant to root penetration
  • Hot air welding without use of open flames
  • Recyclable

Packaging

Packaging unit:

see price list

Roll length:

15.00 m

Roll width:

2.00 m

Roll weight:72.00 kg

Colour

Surface:

slightly structured

Colour top surface:

red

Colour bottom surface:

dark grey

Product Details

Sustainability / Certifications / Approvals

APPROVALS / STANDARDS

Sarnafil® G 476-20 is designed and manufactured to meet most international recognised standards.

  • Polymeric sheets for roof waterproofing according to EN 13956, certified by notified body 1213-CPD-5107 and provided with the CE marking.
  • Reaction to fire according to EN 13501-1.
  • Official Quality Approvals and Agrement Certificates and approvals.
  • Monitoring and assessment by approved laboratories.
  • Quality Management system in accordance with EN ISO 9001/1400.
Product Information

Product Declaration

EN 13956

Shelf Life

Product does not expire if correctly stored.

Storage Conditions

Rolls must be stored in a horizontal position on pallet and protected from direct sunlight, rain and snow.
Do not stack pallets of rolls during transport or storage.

Visible Defects

Pass

(EN 1850-2)

Length

15 m (-0 % / +5 %)

(EN 1848-2)

Width

2 m (-0.5 % / +1 %)

(EN 1848-2)

Effective Thickness

2.0 mm (-5 % / +10 %)

(EN 1849-2)

Straightness

≤ 30 mm

(EN 1848-2)

Flatness

≤ 10 mm

(EN 1848-2)

Mass per Unit Area

2.4 kg/m2 (-5 % / +10 %)

(EN 1848-2)
System information

System Structure

Wide range of accessories is available e.g. prefabricated parts, roof drains, scuppers, protection sheets and separation layers.
  

The following accessories shall be used:

  • Sarnafil® G 410-15 Sheet for detailing
  • Sarnafil® Metal Sheet
  • Sarnabar
  • S Welding Cord
  • Sarna Seam Cleaner
  • Sarna Cleaner
  • S Felt

Compatibility

Not compatible with direct contact to other plastics, e.g. EPS, XPS, PUR, PIR or PF. Not resistant to tar, bitumen, oil and solvent containing materials.
Technical Information

Resistance to Impact

hard substrate

≥ 700 mm

soft substrate

≥ 1250 mm

Resistance to Static Load

soft substrate

≥ 20 kg

rigid substrate

≥ 20 kg

Resistance to Root Penetration

Pass

(EN 13948)

Tensile Strength

longitudinal (md) 1)

≥ 10.0 N/mm2

transversal (cmd) 2)

≥ 9.0 N/mm2

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

Elongation

longitudinal (md) 1)

≥ 240 %

transversal (cmd) 2)

≥ 230 %

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

Joint Shear Resistance

≥ 600 N/50 mm

(EN 12317-2)

 

Dimensional Stability

longitudinal (md) 1)

≤ |0.2| %

transversal (cmd) 2)

≤ |0.1| %

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

Foldability at Low Temperature

≤ -25 °C

(EN 495-5)

Water Tightness

Pass

(EN 1928)

Effect of Liquid Chemicals, Including Water

On request

(EN 1847)

Resistance to UV Exposure

not resistant for permanent exposure to UV irradiation.

Reaction to Fire

Class E

(EN ISO 11925-2, classification to EN 13501-1)

Application

Application Information

Ambient Air Temperature

-20 °C min. / +60 °C max.

Substrate Temperature

-30 °C min. / +60 °C max.
Application steps

SUBSTRATE QUALITY

The substrate surface must be uniform, smooth and free of any sharp protrusions or burrs, etc.


The supporting layer must be solvent resistant, clean, dry and free of grease and dust. Metal sheets must be degreased with Sarna Cleaner before adhesive is applied.

APPLICATION

Installation works must be carried out only by Sika instructed contractors for roofing.
Installation of some ancillary products, e.g. contact adhesives / cleaners is limited to temperatures above +5 °C. Please observe information given by Product Data Sheets.Special measures may be compulsory for installation below +5 °C ambient temperature due to safety requirements in accordance with national regulations.

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