Sarnafil® S 327-20 EL
Sarnafil® S 327-20 EL (thickness 2.0 mm) is a polyester reinforced, multi-layer, synthetic roof waterproofing sheet based on polyvinyl chloride (PVC) containing ultraviolet light stabilizers and flame retardant according to EN 13956.
Sarnafil® S 327-20 EL is a hot air weldable roof membrane formulated for direct exposure and designed to use in all global climatic conditions.
- Proven performance over decades
- Lacquer coated surface
- Resistant to UV exposure
- Resistant to permanent wind exposure
- Resistant to all common environmental influences
- Hot air weldable
- No open flame equipment required
- High water vapour permeability
Usage
Waterproofing membrane for:- Mechanically fastened roofing systems
Advantages
- Proven performance over decades
- Lacquer coated surface
- Resistant to UV exposure
- Resistant to permanent wind exposure
- Resistant to all common environmental influences
- Hot air weldable
- No open flame equipment required
- High water vapour permeability
Packaging
Sarnafil® S 327-20 EL standard rolls are wrapped individually in a blue PE-foil.
| Packing unit: | see price list |
| Roll length: | 15,00 m |
| Roll width: | 2,00 m |
| Roll weight: | 72,00 kg |
Colour
| Surface: | matt |
| Colours: | |
| Top surface: | light grey (nearest RAL 7047) |
| Bottom surface: | dark grey |
Product Details
ENVIRONMENTAL INFORMATION
- BRE Environmental Product Declaration (EPD)
APPROVALS / STANDARDS
- CE Marking and Declaration of Performance to EN 13956 - Polymeric sheets for roof waterproofing
- Factory Mutual (FM) Certificate - Approval Class 4470
- External fire performance tested according to ENV 1187 and classified according to EN 13501-5: BROOF (t4)
Product Declaration
EN 13956 - Polymeric sheets for roof waterproofing
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.
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 1849-2) |
Compatibility
Not compatible with direct contact to other plastics, e.g. EPS, XPS, or PF. Not resistant to tar, bitumen, oil and solvent containing materials.These materials could adversely affect the product properties.
Resistance to Impact
| hard substrate | ≥ 900 mm |
| soft substrate | ≥ 1250 mm |
Hail Resistance
| rigid substrate | ≥ 35 m/s |
| flexible substrate | ≥ 40 m/s |
Resistance to Static Load
| soft substrate | ≥ 20 kg |
| rigid substrate | ≥ 20 kg |
Tensile Strength
| longitudinal (md)1) | ≥ 1100 N/50 mm |
| transversal (cmd)2) | ≥ 1100 N/50 mm |
1) md = machine direction
2) cmd = cross machine direction
Elongation
| longitudinal (md)1) | ≥ 12 % |
| transversal (cmd)2) | ≥ 12 % |
1) md = machine direction
2) cmd = cross machine direction
Tear Strength
| longitudinal (md)1) | ≥ 200 N |
| transversal (cmd)2) | ≥ 200 N |
1) md = machine direction
2) cmd = cross machine direction
Joint Peel Resistance
| no failure of the joint | (EN 12316-2) |
Joint Shear Resistance
| ≥ 800 N/50 mm | (EN 12317-2) |
Dimensional Stability
| longitudinal (md)1) | ≤ |0.3| % |
| transversal (cmd)2) | ≤ |0.2| % |
1) md = machine direction
2) cmd = cross machine direction
Solar Reflectance Index
| Colour | Initial | 3 years aged | Test Institute |
| RAL 9016 SR | 114 | - | Sika |
CRRC tested products, listed in Cool Roof Rating Council (CRRC) product data base.
Foldability at Low Temperature
| ≤ -25 °C | (EN 495-5) |
Water Tightness
| Pass | (EN 1928) |
Effect of Liquid Chemicals, Including Water
| On request | (EN 1847) |
UV Exposure
| Pass (> 5000 h / grade 0) | (EN 1297) |
External Fire Performance
| BROOF (t4) 0° - 70° (subject to construction) | (EN 13501-5) |
Reaction to Fire
| Class E | (EN ISO 11925-2, classification to EN 13501-1) |
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
Semi-automatic: Leister Triac Drive
SUBSTRATE QUALITY
The substrate surface must be uniform, smooth and free of any sharp protrusions or burrs, etc.
Sarnafil® S 327-20 EL 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
Reference must be made to further documentation where applicable, such as application manual and installation or working instructions.
Fixing method- General
The waterproofing membrane is installed by loose laying ( without stretching membrane or installing under tension) with mechanical fastening in seam overlaps or independent from overlaps.Overlap seams are hot welded using specialised hot air equipment.
Fixing method-Linear fastening (Sarnabar®)
Unroll the Sarnafil® S 327-20 EL membrane, overlap by 80 mm, weld immediately and fix to the substructure by means of the Sarnabar® fasteners. The preferred type of fastening will be advised by Sika. The spacing of the fasteners is in accordance with the project specific Sika calculations. The perimeter piece ends must be secured with the Sarnabar® Load Distribution Plate. For protection fasten a piece of Sarnafil® S 327-20 EL under bar end and plate. Leave a 10 mm clearance between bar ends. Do not fasten in hole nearest bar end. Cover the bar ends with a piece of Sarnafil® S 327-20 EL and weld. After installation the Sarnabar® must immediately be made watertight with a Sarnafil® S 327-20 EL cover strip. At upstands and at all penetrations, the Sarnafil® S 327-20 EL membrane must be secured with a Sarnabar®. The 4 mm diameter S-Welding Cord protects the Sarnafil® S 327-20 EL roof covering against tearing and peeling off by wind uplift.
Fixing method-In seam fastening (Sarnafast®)
Sarnafil® S 327-20 EL must always be installed at right angles to the deck direction. Sarnafil® S 327-20 EL is fixed by means of the Sarnafast® fasteners and barbed washers/tubes along the marked line, 35 mm from the edge of the membrane. Sarnafil® S 327-20 EL is overlapped by 120 mm. The spacing of the fasteners is in accordance with the project specific Sika calculations. At upstands and at all penetrations, the Sarnafil® S 327-20 EL membrane must be secured with a Sarnabar®. The 4 mm diameter S-Welding Cord protects the Sarnafil® S 327-20 EL roof covering against tearing and peeling off by wind uplift.
Hot welding method
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.
Testing overlap seams
The seams must be mechanically tested with screw driver or steel needle to ensure the integrity/completion of the weld. Any imperfections must be rectified by hot air welding.