Not a very exciting blog post I’m afraid but if you’re an architect, surveyor or planner these tables contain pretty much all the information you need for specifying a living green roof.

Enviromat sedum matting technical data

Water retention matting technical data

Green roof drainage matting technical data

Flat roof build up technical specification

Pitch roof build up technical specification

Enviromat sedum matting technical data

DESCRIPTIONPre cultivated vegetation blanket on patented nylon loop and geotextile base carrier with substrate growing medium 
GROWERHarrowden Turf Ltd, Corkway Drove, Hockwold, Thetford, Norfolk IP26 4JR
Telephone 01842 828266
Website: www.enviromat.co.uk 
APPLICATIONSExtensive green roofing
Low maintenance ground cover 

COMPOSITIONGeotextile

Substrate Growing MediumVegetated Layer
 Geotextile carrier filter layer with bonded UV resistant nylon loopsRecycled crushed brick and expanded clay shale with 20% composted green waste. pH value 6.5 – 795% coverage of mixed plant speceise, predominantly sedums.
STANDARD ROLL SIZE 1000mm x 2000mm
NON-STANDARD ROLL SIZE1000mm x 1000mm (slab)
1000mm width cut only in increments of 500mm
For lengths of 2500mm or more, mechanical handling equipment will be needed
SATURATED WEIGHT 34Kg per square metre
THICKNESS 20mm excluding vegetation.
Vegetation will be approx 30-50mm high at despatch.  Once established, plants wil lreach a height of up to 120mm depending on growing conditions

Water retention matting technical data

DESCRIPTIONLight weight fleece provides some water storage
APPLICATIONSUse beneath Enviromat sedum matting on flat roof, pitched roof and ground applications
COMPOSITIONRecycled fibres, 80% man made, 20% organic
WATER HOLDING CAPACITY9 litres per square metre
SATURATED WEIGHT9Kg per square metre
THICKNESS8mm

Green roof drainage matting technical data

DESCRIPTIONLight weight drainage mat comporising two layers of geotextile filter layer with bonded UV resistant nylon loops sandwiched between them.
APPLICATIONSUse beneath Enviromat sedum matting and water retetion matting on flat roof and ground applications.
SATURATED WEIGHTn/a – minimal
THICKNESS20mm

Flat roof build up technical specification

APPLICATIONSSuitable for ground use and/or flat roofs with a 1-3 degree pitch.
Sunny aspect with direct sunlight for at least half the day.
PITCH SUITABILITY1 degree (minimum pitch)
3 degrees (maximum pitch)
COMPONENTS REQUIREDHeavy guage polyethene root barrier
Drainage matting
Water retention fleece
Enviromat sedum matting
Components protect waterproof layer against root damage and allow adequate drainage whilst retaining enough moisture to support the plants through all but the most prolonged drought.
DEPTH 
(excluding vegetation)
48mm
SATURATED WEIGHTFor roof applications plaeas allow for a weight of 120Kg/m2 to accommodate live loading.
MAINTENANCE1-2 maintenance vists per year are essential.

Pitch roof build up technical specification

APPLICATIONSSuitable for sloping banks and/or pitched roofs with a 3.5 to 20 degree pitch.
Sunny aspect with direct sunlight for at least half the day.
PITCH SUITABILITY3.1 degree (minimum pitch)
10 degrees with no irrigation available
20 degrees if irrigation system is installed
COMPONENTS REQUIREDHeavy guage polyethene root barrier
Water retention fleece
Enviromat sedum mattingComponents protect waterproofing layer against root damage whilst retaining enough moisture to support the plants through brief periods of drought.

DEPTH
(Excluding vegetation)
28mm
SATURATED WEIGHTFor roof applications please allow for a weight of 120Kg/m2 to accommodate live loading.
MAINTENANCE1-2 maintenance visits per year are essential.
On slopes greater than 10 degrees, or on exposed and windy sites, your Enviromat will need watering in hot dry weather.