Envirotech EVA (elvaloy) single ply flat roof waterproofing

 




 

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Other pages within this section include:
- EVA (Elvaloy) Research & Development - more info >>
- Certifications and Approvals - more info >>
- Guarantee and Warranty - more info >>

Envirotech EVA is a single ply roofing membrane designed for the long term use as a waterproofing solution to both new build and refurbished low slope roofs.

Membrane Choice
Envirotech EVA membranes are available in a standard reinforced sheet for mechanical attachment or fleece backed for fully adhered application.

Chemical Resistance
Envirotech EVA membranes offer excellent chemical resistance which has led to their use on airports, industrial plants, restraints and factories where chemical and grease can affect traditional membranes. Envirotech EVA is also fully compatible with bitumen, Asphalt, all types of insulation and offers good resistance to root penetration.
Due to Envirotech EVA’s compatibility with bitumen and Asphalt it has been extensively used on refurbishment and overlay projects. This can lead to a dramatic reduction in potential disruption to any building occupier.

Membrane Life Expectancy
Envirotech EVA Membranes have been manufactured and installed for almost 20yrs in some of the toughest climates in the world. The membrane systems are resistant to heavy rain, temperature extremes and have outstanding wind resistance properties. Furthermore the reinforcement has patented Aramid reinforcement along the edge which has high resistance to wind uplift forces.

Long Term Flexibility
PVC requires the addition of plasticisers to create flexibility required for roofing membranes. Systems that rely on liquid plasticisers can suffer from plasticiser migration, where time and temperature cause the additives to leach out of the surface of the membrane. This can lead to brittleness and cracking. Dupont Elvaloy is a solid phase modifier that remains intrinsic to the polymer which leads to long term flexibility and enables re-welding after long periods without the need to reactivate the membrane in anyway.

Hot Air Seam Welding
The seams and joints are welded by hot air which is recognised as the strongest, fastest and most reliable seaming method in the flat roofing industry. There are therefore no naked flames required on site reducing the risk of fire and the cost of insurance premiums.

Seam welding by hot air physically fuses together the top and bottom sheet, resulting in a single monolithic sheet instead of multiple layers of membrane with tape or adhesive. The seam when fused together becomes stronger that the membrane itself.