Green Roof Build Up

Green roofs are created when living plants are grown on a roof structure.

A common feature in Europe, there is an increasing number of green roofs in the United Kingdom.

New construction techniques have created endless opportunities for many different types of green roofs. In particular, technology for the creation of ‘extensive’ green roofs has been developed, where the plants chosen require minimal maintenance are drought-tolerant and will flourish in lightweight substrate at relatively shallow depths.

Lindum Green Roof Mats

Supplied ready-to-roll-out as an instant vegetation layer, with the plants established and growing in a strong felt made from recycled textiles. The Lindum Wildflower Mat and SedumPlus Mat are lightweight, easy to install and low maintenance, available in 2 roll sizes to suit requirements and suitable for use with lightweight green roof substrates.

Lindum can offer a complete green roof package, including lightweight substrate, drainage layer and green roof edge profile. We can also make recommendations for the waterproof membranes, irrigation, stabilisation and pebbles for the borders.

Vegetation Layer

All Lindum’s green roof vegetation mats are lightweight and easy to install. They are supplied ready-to-roll-out as an instant vegetation layer, with the plants established and growing in a strong felt made from recycled textiles.

PRODUCT REFERENCE LINDUM WILDFLOWER MAT LINDUM SEDUM MAT
MATERIAL 450gsm felt with scrim Coconut fibre carrier
THICKNESS 25mm 25mm
VEGETATION COVERAGE 75% (minimum) at point of sale 75% (minimum) at point of sale
ROLL SIZE
  • 1.2m2 (0.6m x 2.0m)
  • 2.4m2 (1.2m x 2.0m)
1.2m2 (0.6m x 2.0m)
SATURATED WEIGHT 25KG per square metre 25KG per square metre
MAXIMUM M2 PER PALLET 40 40
DELVERY OPTIONS
  • Pallet delivery service for small orders
  • Rigid with tail lift offload facilities
  • Artic with mounted forklift
  • Pallet delivery service for small orders
  • Rigid with tail lift offload facilities
  • Artic with mounted forklift

Lightweight Substrate

Lindum Green Roof Substrate is a blend of lightweight manufactured topsoil and lightweight aggregate.

The topsoil is manufactured from reclaimed sand and PAS 100 green waste compost and is certified to BS3882:2015 standards. The specially matured and graded recycled green waste compost provides optimal stability and minimal leaching for organic matter and nutrients. The topsoil is blended with carefully selected and graded lightweight expanded clay aggregate, sourced from the UK.

Lindum’s Green Roof Substrate provides good aeration and water holding properties and controlled fertility levels. It is simple to work with, lightweight, and offers guaranteed consistency throughout the green roof installation.

Available in 1m3 tote bags, 20 litre heat-sealed sacks, or in bulk, Lindum’s Green Roof Substrate provides high quality green roof growing medium with green provenance: peat free and derived from 100% UK-sourced materials.

PRODUCT REFERENCE LINDUM LIGHTWEIGHT GREEN ROOF SUBSTRATE
MATERIAL A blend of lightweight aggregate and the award winning topsoil
DEPTH 50mm – 100mm (dependant on vegetation)
SATURATED WEIGHT
  • At 50mm settled depth = 50KG per square metre
  • At 75mm settled depth = 75KG per square metre
  • At 100mm settled depth = 100KG per square metre
BAG SIZES
  • 1m3 tote bags
  • 20 litre heat sealed bags
  • Bulk loose
MAXIMUM VOLUME PER PALLET
  • 1m3 as 1 x 1m3 tote bag
  • 1m3 as 50 x 20 litre bags
DELIVERY OPTIONS
  • Pallet delivery service for small orders
  • Rigid with tail lift offload facilities
  • Artic with mounted forklift
  • Bulk tipper
AREA COVERED
Bag size Depth (settled) m2 covered*
1m3 tote 50mm 19.00m2
1m3 tote 75mm 12.50m2
1m3 tote 100mm 9.50m2
20 litre 50mm 0.38m2
20 litre 75mm 0.25m2
20 litre 100mm 0.19m2
*Please allow for 5% settlement when ordering

Drainage Layer

Lindum‘s drainage layer product, Roofdrain, is ideal for extensive green roofs as it provides a lightweight drainage layer with a water reservoir to sustain plant growth. Roofdrain attenuates rainfall making it an important element of SUDS system. Roofdrain consists of a perforated cuspated recycled HDPE (high density polyethylene) core with selected geotextiles thermally bonded on each side. The core acts as a water reservoir holding 4.5-5.5 litres per square metre for plants to access in dry periods. The core is perforated to allow excess rainwater to flow into the underside and away to drainage outlets. The upper geotextile also has a ‘zero’ breakthrough head to prevent over-saturation of the substrate. The lower geotextile has two key functions: it offers additional protection to the waterproof membrane and acts as an extra moisture retentive layer, holding an additional 1.0 litres per square metre. This further enhances the water holding capacity of the system and slows the rate of run-off. The Roofdrain is manufactured in the UK from up to 95% recycled material making it a sound environmental choice.

PRODUCT REFERENCE LINDUM ROOFDRAIN 20
MATERIAL Recycled High Density Polyethylene water reservoir core with moisture retentive protective fleece to underside and geotextile filter mat to upper side
THICKNESS 22mm
INFILL Not required
ROLL SIZE 920mm x 50m (46 square metres per roll)
WATER STORAGE CAPACITY 6.5 litres per square metre
SATURATED WEIGHT 7.5KG per square metre
MAXIMUM M2 PER PALLET 92 square metres (2 rolls)
ALSO AVAILABLE
Product Water storage Weight
Lindum Roofdrain40 13.0l/m2 15KG/m2

Edging Details

Lindum Green Roof Edge can be used to retain or separate the green roof materials. Manufactured in the UK from high % recycled content aluminium, supplied pre-punched and profiled in 2.4m lengths in a choice of heights for quick installation. The edging profiles can be colour coated in RAL colours. Please ask for more details.

Other green roof materials

Please contact Lindum for further information on waterproof membranes, root barrier layers and vegetation barriers. We can advise and recommend specialist suppliers of these materials.

Advice on the construction of green roofs is available from many sources including:

www.thegreenroofcentre.co.uk

www.greenroofguide.co.uk