Sarnafil® G 476-15 (CN_GB)

POLYMERIC MEMBRANE FOR ROOF WATERPROOFING

Sarnafil® G 476-15 (CN_GB) is a multi-layer, synthetic roof waterproofing membrane based on premium-qualitypolyvinyl chloride (PVC) with an inlay of non-woven glassfiber .

  • Outstanding root resistance
  • Excellent weldability
  • Good flexibility in cold temperatures
  • Excellent dimensional stability
  • Good tensile and tearing strength
  • High resistance to mechanical impact
  • High water vapour permeability
  • Recyclable (Delete if recycling facilities or recycling offerings for roofing membranes are not available in local country)
Product Data Sheet Show all documents

Overview

Usage

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

Advantages

  • Outstanding root resistance
  • Excellent weldability
  • Good flexibility in cold temperatures
  • Excellent dimensional stability
  • Good tensile and tearing strength
  • High resistance to mechanical impact
  • High water vapour permeability
  • Recyclable (Delete if recycling facilities or recycling offerings for roofing membranes are not available in local country)

Packaging

Standard rolls are wrapped individually in a blue PE-foil.

Packing unit:see price list
Roll length:

20,00 m

Roll width:

2,00 m

Roll weight:70,00 kg

Colour

Top Surface:

orange

Bottom surface:dark grey

Product Details

APPROVALS / CERTIFICATES

Sarnafil® G 476-15 (CN_GB) is designed and manufactured to meet most international recognised standards.

  • Polymeric PVC sheets for waterproofing according to GB12952, Type G
  • Polymeric sheets for roof waterproofing according to EN 13956
  • Official quality approvals and agreement certificates and approvals
  • Monitoring and assessment by approved laboratories

Composition

Polyvinyl Chloride (PVC)

Shelf life

5 years from date of production.

Storage conditions

Product must be stored in original unopened and undamaged sealed packaging in dry conditions and temperatures between +5 °C and +30 °C. Store in a horizontal position. Do not stack pallets of the rolls on top of each other, or under pallets of any other materials during transport or storage. Always refer to packaging.

Product Declaration

EN 13956 - Polymeric sheets for roof waterproofing

Visible Defects

Pass

(EN 1850-2)

Length

20 m (-0 / +5 %)(EN 1848-2)

Width

2 m (-0,5 / +1 %)(EN 1848-2)

Effective Thickness

1,5 mm (-5 / +10 %)(EN 1849-2)

Overall Thickness

1,5 mm (-5 % / +10 %)(GB 12952)

Straightness

≤ 30 mm

(EN 1848-2)

Flatness

≤  30 mm(EN 1848-2)

System Structure

The following products must be considered for use depending on roof design:

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

Ancillary products: wide range of accessories is available e.g. prefabricated parts, roof drains, scuppers, protection sheets and separation layers.

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.

Resistance to Impact

hard substrate≥    500 mm
soft substrate≥  1000 mm

watertight

Resistance to Static Load

soft substrate≥ 20 kg
rigid substrate≥ 20 kg

watertight

Resistance to Root Penetration

Pass(EN 13948)
Pass

(JC/T1075)

Pass

(FLL)

Tensile Strength

longitudinal (md)1)≥  10 N/mm2
transversal (cmd)2)≥    9 N/mm2

≥  10 MPa

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

Elongation

longitudinal (md)1)≥  230 %
transversal (cmd)2)≥  210 %

≥ 200 %

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

Dimensional Stability

longitudinal (md)1)

≤ |0,2| %

transversal (cmd)2)

≤  |0,1| %

≤ 0,1 %

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

Joint Peel Resistance

≥  3 N/mm

(GB/T328.21)

Joint Shear Resistance

≥  550 N/50 mm

(EN 12317-2)

Foldability at Low Temperature

≤  -25 °C

(EN 495-5)

no crack

(GB/T328.15)

Reaction to Fire

Class E

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

Class E

(GB 8624 / EN 13501-1)

Effect of Liquid Chemicals, Including Water

On request

(EN 1928)

Resistance to Alkalinity

tensile strength retention≥  85 %

elongation retention
≥  80 %
low temperature bendno crack

Retention of Properties after Heat Ageing

tensile strength retention≥  85 %
elongation retention
≥  85 %
low temperature bendno crack

Resistance to UV Exposure

Not resistant for permanent exposure to UV irradiation.

Water Absorption

wet weight

≤ 4 %

dry weight

≤ -0,4 %

Watertightness

pass

(EN 1928)

watertight

(GB/T328.10)

Application

Ambient Air Temperature

-20 °C min. / +60 °C max.

Substrate Temperature

-30 °C min. / +60 °C max.

EQUIPMENT

Hot welding overlap seams
Electric hot air welding equipment, such as hand held manual hot air welding equipment and pressure rollers or automatic hot air welding machines with controlled hot air temperature capability of a minimum +600 °C.
Recommended type of equipment:

Manual: Leister Triac

Automatic: Sarnamatic 681

 

SUBSTRATE QUALITY

The substrate surface must be uniform, smooth and free of any sharp protrusions or burrs, etc. Sarnafil® G 476-15 (CN_GB) must be separated from any incompatible substrates / materials by an effective separation layer to prevent accelerated ageing. The supporting layer must be compatible to the membrane, solvent resistant, clean, dry and free of grease and dust. Metal sheets must be degreased with Sarna Cleaner before adhesive is applied.

 

APPLICATION

Installation procedure
Strictly follow installation procedures as defined in method statements, application manuals and working instructions which must always be adjusted to the actual site conditions.


Adhered roof membrane and flashings
The membrane is bonded to the substrate and flashings by using Sarnacol® 2170 / 2172 Spray contact adhesive.                                                 
Ballasted roof membrane

The roof waterproofing membrane is installed by loose laying and covering with ballast. The weight of ballast required must be calculated in accordance with project specific calculations based on national standards. The membrane is then covered with a protective layer of S-Felt protective layer or Sarnafil® Protective Sheet which is then fully covered evenly with a minimum 50 mm thickness of washed gravel (8-16 or 16-32 mm diameter).

Hot welding overlap seams
Overlap seams must be welded by electric hot welding equipment. Welding parameters including temperature, machine speed, air flow, pressure and machine settings must be evaluated, adapted and checked on site according to the type of equipment and the climatic conditions prior to welding. The effective width of welded overlaps by hot air must be minimum 20 mm.

Testing overlap seams
The seams must be mechanically tested with screw-driver to ensure the integrity/completion of the weld. Any imperfections must be rectified by hot air welding.

 

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