Shire Green Roof Substrates Ltd

Shire Ultralite Intensive Substrate

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Substrate Description

Lightweight substrate made from sustainable aggregates and green waste compost.

Substrate Application

General purpose green roof growing media for intensive green roofs

  • Lightweight intensive substrate
  • Substrate for planters and green walls
  • Suitable for rooftop gardening
Technical Information (Typical)
Size: Sieve Size (mm) % passing Intensive substrate for green roofs 
Photo Courtesy: TIGA Europe Limited
13 96
5 40
pH value: 8.5
Total pore volume: 52 - 60%
Soil Organic Matter (SOM): 9.5%
Maximum water holding capacity: 43.4% vol.
Driest days in Summer
FLL Maximum
water capacity
Design maximum
m3 680 1150 1300
1 sq m @ 100mm 68 115 130
1 sq m @ 25mm 17 29 33
Packaging: Supplied by bulk tipper load, in multi trip 1 m3 big bags and 25kg sacks (40 per m3)

The above information is issued in good faith and without warranty and is intended as a guide only. The information comprises typical data and does not constitute a specification. Specification values are available separately upon request.

The Manufacturing Process

This substrate is a manufactured by combining a BS3882:2015 compliant loam topsoil made with PAS100 green waste compost blended with specially graded sustainable aggregates. In the case of this substrate it is lightweight expanded clay aggregate mixed with specially crushed aircrete sourced directly from the supplier of autoclaved blocks. Damaged or cracked blocks that cannot be supplied to house builders are set aside and crushed to our specification for use in green roof growing media.

BSI PAS 100 Green Waste Compost

Where the growing media incorporates compost it is derived from a sustainable source, normally green waste compost to PAS 100, derived from horticultural wastes collected during municipal works, e.g. hedge trimming, etc.

Intensive green roof substrate used with planted shrubs

Intensive Substrate used with planted shrubs and meadow flowers

"Shire provided me with authoritative advice on soil weights, depths and constituents for both my extensive and intensive roofs. They were able to provide local materials from the south east and they were able to deliver the 20 tonnes of soil on an articulated lorry with its own forklift. Everything from the first enquiry to the final delivery was carried out in a very professional way."

Justin Bere


24 Rosebery Avenue
London EC1R 4SX
United Kingdom