The #1 self-adhesive waterproofing membrane
- Self-adhesive underside coating
- Bitumen-free & solvent-free
- High adhesive strength
- Ideal for steep slope or curved roof areas
EVALON® VSK
Superior Self-Adhesive Waterproofing
EVALON® VSK membranes are based on our long-term proven alwitra® roofing system. The waterproofing membrane has both a polyester fleece-backing and a synthetic adhesive compound coating. After laying, the fleece-backing also reduces stress and strain on the system (vapour decompression, movement compensation, etc.). The coating is bitumen-free and solvent-free and covered with a protective film when delivered.
25 Year Guarantee
50 Year Service Life
BREEAM Accredited
Trusted by architects, roofing contractors & developers
Downloads
Download EVALON® VSK BrochureApplications
EVALON® VSK is suitable for:
- Steep sloped roofs
- Curved roofs
- Flat roofs
- Bridging expected cracks
Advantages
- Quick & Easy Install without additional adhesives
- Time and labour saving
- Clean install
- Solvent-free self-adhesive backing
- Direct laying onto bituminous materials
- Superior adhesion without a flame
Product Details Back to top
Product Specification
All EVALON® VSK standard rolls are individually wrapped and laid horizontally on pallets of up to 15 units, for transportation.
| Properties | Measurement |
|---|---|
| Effective thickness of waterproofing layer (mm) | 1.2 / 1.5 |
|
Width (m) |
1.05 1.05 |
| Lengths (m) | 20* / 25 |
| Specified lengths | on request |
| Standard colours | white / light grey / slate grey |
| Special colours | on request |
*Only available for EVALON® VSK 1.05mm, slate grey
Technical Drawings
Technical Data
| Properties | Testing Method | Unit | EVALON® VSK Results |
|---|---|---|---|
| Visible Defects | EN 1850-2 | passed | |
| Effective Thickness (eeff)of waterproofing layer | EN 1850-2 | mm | 1.2/1.5 |
| Water tightness | EN 1928 (B) | kPa | ≥ 400 |
| External Fire Performance | ENV 1187 CEN/TS 1187 | class BROOF (t1)+(t3)+(t4) confirmed by General Building Construction Supervision Test Certificates | |
| Reaction to Fire | EN 13501-1 | class E | |
| Joint Peel Resistance | EN 12316-2 | N/50mm | ≥ 150C |
| Joint Sheer Resistance | EN 12317-2 | N/50mm | ≥ 400C |
| Max. Tensile Force | EN 12311-2 (A) | N/50mm | ≥ 500 |
| Elongation at Max. Tensile Force | EN 12311-2 (A) | % | ≥ 60 |
| Resistance to Impact Load | EN 12691 (A) | mm | ≥ 300 |
| Resitance to Static Load | EN 12730 (B) | kg | ≥ 20 |
| Tear Resistance | EN 12310-1 | N | ≥ 300 |
| Tear Resistance | EN 12310-2 | N | ≥ 150C |
| Resistance to Root Penetration | EN 13948 | passedᵈ | |
| Dimensional Stability | EN 1107-2 | % | ≥ 1 |
| Low Temperature Flexibility | EN 495-5 | °C | ≥ -30 |
| Durability (UV Exposure, High Temperatures & Water | EN1297 | Visual Control | passed |
| Durability of Water Tightness Against Artificial Aging | EN 1296 EN 1928 | kPa | ≥ 60 |
| Durability of Water Tightness Against Chemicals incl. water | EN 1847 EN 1928 | kPa | ≥ 60 |
| Hail Resistance | EN 13583 | m/s | ≥ 30 |
| Water Vapour Permeability | EN 1931 | µ | approx. 20,000 |
| Bitumen Compatibility | EN 1548 | passed |
Quality
| Certifying body | Testing |
|---|---|
| State Material Testing Institute, Darmstadt, Germany | External quality control Certificate of conformity according to DIN EN 13956 and DIN EN 13967 |
| DEKRA Certification GmbH, Stuttgart | Comprehensive external quality control of the product system |
| Society for Materials Research and Testing Institute for the Leipzig construction industry Warringtonfire Gent (Belgium) Exova Warringtonfire (United Kingdom) |
Tests with General Building Construction Supervision Test Certificate (AbP) according to DIN 4102-7 (resistance to flying sparks and radiant heat) as well as DIN CEN/TS 1187; Test methods 1, 3 and 4 (external fire load) with classification according to DIN EN 13501-5 resp. AbP Tests according to DIN 4102-1 (building material class B2) and DIN EN ISO 11925-2 with classification according to DIN EN 13501-1 (class E) |
| Environmental Product Declaration | EPD‘s for various application methods and material thicknesses according to ISO 14025 and EN 15804 corresponding to the guidelines of the Institute Construction and Environment (IBU) |
| German Institute for Building Technology (DIBt), Berlin, Germany | European technical assessment ETA-08/0112 (ETAG 006) |
| Chamber of Agriculture Rhineland, teaching and research institute for Gardening and landscaping, Essen, Germany | Testing according to FLL 84 (root penetration resistance) |
| Research institute, Field of Landscaping, Geisenheim, Germany | Testing according to FLL 99 (root / rhizome penetration resistance) |
| British Board of Agrément (BBA), Garsten/Watford, UK | Tests according to Building Standards Regulations (England, Wales and Scotland), Certificate No. 96/3293 |
| Scientific and Technical Center for Building), Marne Valle, France | Avis Techniques CSTB 5.2/19-2641_V1, CSTB 5.2/19-2640_V1 |
| Factory Mutual / FM Global, Norwood, USA | FM-Approval, Class 4470 |
Sustainability
Alwitra was the first enterprise of the industry to introduce relevant Environmental Product Declarations of the Institute Construction and Environment (Institut Bauen und Umwelt e. V. - IBU) for the EVALON®® and EVALASTIC®® waterproofing membranes.
For certifications according to DGNB, LEED or BREEAM Alwitra provides appropriate product fact sheets.
Applications Back to top
Application Examples |
 Loose Laid with BallastGravel, roof garden, concrete paving slabs |
 Mechanically FastenedIn the seam overlap or with field fastening |
 BondedWith compatible adhesives |
 Self-AdheredWith compatible primer |
|---|---|---|---|---|
| non ventilated roofs (warm deck roofs) | No |
No |
No |
Yes |
| ventilated (two layer) roofs (cold deck roofs) | No |
No |
No |
Yes |
Substrate Quality
The substrate surface must be clean, dry and free of dust and grease.
Always prime with Alwitra Primer SK and ensure you use Alwitra Primer SK-L if applying at low temperatures as it takes less time to dry. Use at least 0.2 L / m2.
The supporting layer must be compatible with the membrane, solvent resistant, clean, dry and free of grease and dust.
Application
Installation works must be carried out only by trained Alwitra roofing contractors.
Would you like to become a dedicated Alwitra roofing contractor?
We can provide the necessary training on the installation of our products.
Case Studies Back to top
Hanham Mausoleum,
Sturminster Newton
EVALON® VSK, Standing Seam & Lead Roll Profiles
View Case StudyDocuments Back to top
EVALON® Waterproofing Membranes
Accessories Back to top
EVALON® V
Superior Single-Ply Waterproofing
Superior single ply waterproofing at its best.
- Bitumen-free & solvent-free
- UV Stable
- Root-resistant
- Fire load five times lower than that of a built-up felt roof
EVALON® VG
Superior Fire-Retarding Waterproofing
Superior Fire-Retarding Waterproofing
- Compatible with bitumen
- High thermal-mechanical resilience
- Root and rhizome-resistant
- High reflection of heat rays
EVALON® VGSK
Superior Fire-Retarding Self-Adhered Waterproofing
- Up to five times lower fire load compared to two-layer seals
- Optimal vapour pressure compensation function of the polyester fleece or glass/polyester fleece backing
- Self-adhesive underside coating
- With the integrated fire protection layer, for direct bonding on unbacked rigid EPS foam boards
