EVR-4: Stone Base System

EVR 4 is generally used on inverted roof areas where the roof requires additional build up for level transitions and surface levels.

This system provides excellent vertical drainage and allows the FFL to be set at desired levels, additionally provides anchorage and a fire break between our system and the waterproofing build up. Approx dry weight of the system 170-200 kgs m2 @100 mm depth.

System heights can be set to requirements by adjusting aggregate build ups. The combined build up of the Wonder Yarn 36mm and 30mm Forcefield foam is 66mm however as artificial grass has a crush factor of a minimum of 50% the total height reduced to 48mm. This means that aggregate levels should be finish at 48mm below FFL.

As a norm all of the Everroof systems require a perimeter 250mm margin of Scottish pebbles to provide perimeter anchorage, however the EVR4 system does not require the pebble margin as the aggregate build up provides the necessary anchorage for the system.