The roofing method we use is Alwitra®. This system has proved itself with a British Board of Agreement Certificate. It has a life expectancy in excess of  25 years. Alwitra® Evalon single-ply polymeric membranes are suitable for all types of flat roof construction. The roofing membrane remains permanently flexible, is bitumen compatible and is available in a range of colours.

Alwrtra membranes are suitable for both new build and refurbishment projects and can be fully bonded, mechanically fastened or loose laid and ballasted. There are two in the range: Evalon, a vinyl ethylene terpolymer and Evalastic, a modified EPDM. Each is bitumen compatible and  manufactured in a range of coloured sheets 25 metres long by up to 2.05 metres wide.


The Ultimate Overlay
Evlon membranes are particularly suitable for overlaying existing flat or pitched, metal clad or asbestos roofs, with the minimum of disruption to existing users. Existing features, designed into the roof can be faithfully reproduced to retain the initial architectural concept within a highly competitive package.

• Are fully bitumen compatible and compatible with all types
  

• Of insulation boards (including polystyrene EPS & XPS)
  

• Are user-friendly and quick and simple to install. 
  

• Heat or solvent-welding effectively provides seamless roof coverings.
  

• The membranes remain permanently weldable
  

• Have a smooth surface that does not retain dirt.
  

• Light colours promote good solar reflectivity.
  

• Offer excellent mechanical properties due to high strength and elongation.
  

• Are resistant solar radiation without protective coatings.  Suitable for the use under
   paviours or other load spreading layers (e.g. car parks), and roof gardens.
  

• Are self-extinguishing and comply with all regulations for fire resistance.
  

• Are resistant to Chemical pollution in the environment.

• Are manufactured in compliance with DIN EN ISO 9001 – Quality Management System.
  

• Are resistant to root penetration (can be used in roof gardens without the need for 
  separate root resistant membranes).
  

• Have a low vapour diffusion resistance (trapped moisture can escape through the 
  membrane without causing blisters).
  

• Can be recycled.