Shire Green Roof Substrates Ltd

Shire Ultralite Extensive Substrate

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Substrate Description

Medium nutrient lightweight green roof substrate

Substrate Application

General purpose green roof growing media for extensive roofs

  • Substrate for sedum blanket and wild flower matting
  • Suitable for extensive biodiverse roofs
  • Can be used for planters
Technical Information (Typical)
Size: Sieve Size (mm) % passing Extensive substrate for green roofs 
Photo Courtesy: Bere.architects
13 96
5 70
pH value: Av. 8.5
Total pore volume: 452 - 60%
Soil Organic Matter (SOM): 5%
Maximum water holding capacity: 41% vol.
Driest days in Summer
FLL Maximum
water capacity
Design maximum
m3 690 1100 1270
1 sq m @ 100mm 69 110 127
1 sq m @ 25mm 17.5 27.5 32
Packaging: Supplied by bulk tipper load, in multi trip 1 m3 big bags and 25kg sacks (30 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.

Extensive Substrate used on with plug planted sedum

Adnams Cellar & Kitchen - Photo Courtesy: Permanite Ltd

Adnams Cellar & Kitchen (Southwold, Suffolk)

4.2m3 of extensive substrate were supplied on behalf of Permanite Engineered Roofing Systems in 25kg sacks as access to the roof was rather difficult with bags needing to be moved manually. The roof was completed with sedum matting and has matured nicely with a lush carpet of sedum. The contractor was T H Moss & Sons Ltd.