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BLRG Rain Garden Soil - Urban Drainage System (SuDs) Soil

Verified by manufacturer 6 months ago

Boughton Loam

Rain garden soil, based on an extensive green roof substrate and a small amount of topsoil.

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Application

  • Sustainable urban drainage systems (SuDS).
  • Can be laid to the surface if required, if a brick dominated mixture is allowed for aesthetic reasons.
  • Alternatively, a gravel mulch can be laid above the soil mixture to provide a planting bed, prevent weed ingress and improve aesthetics of the rain garden.
  • Specific deep rooting plants should be specified if a gravel mulch layer above 100 mm is used.

Description

Boughton BLRG Rain Garden Soil is based on an extensive green roof substrate, with a small amount of topsoil blended into the mixture to slow down filtration and provide more body. This will retain water for a longer period of time within the soil mixture, increasing its water storage performance, and improving water quality benefits.


Features and benefits:

  • Provides a free draining mixture with a large amount of porosity.
  • Slows down filtration and provides body.
  • Capable of supporting plants which prefer a freer draining substance, but one that is sometimes saturated.
  • Soil layer should be between 100–200 mm depth and consist of 10 mm pea gravel.
  • Boughton BLRG SuDs soil meets and exceeds all present G.R.O guidelines.


Soil components:

  • Green waste compost (PAS100): 20%.
  • Crushed brick: 70%.
  • Topsoil: 10%.


Heavy metal limits for soil mixtures:

  • Lead: 330 mg/L-1.
  • Nickle: 22 mg/L-1.
  • Copper: 55 mg/L-1.
  • Cadmium: 22 mg/L-1.
  • Zinc: 88 mg/L-1.

General information

Color

Grey

Finish

Natural

Material

Soil

Shape

Formless

Uniclass

Pr_45_31_89_35 Green roof substratesPrimary
Pr_45_31_89_41 Imported growing media
Pr_45_31_89_50 Manufactured growing media

CAWS

Q37/130 Extensive green roof

Q28/125 Green roof growing media system

Specification data - Green roof substrates

General requirements

Topsoil, growing medium, subsoil and preparation materials generally.

Supplier

Boughton Loam.

Standard

G.R.O guidelines.

pH (range)

2.0–3.0.

Maximum water holding capacity (by volume)

30–50% (field capacity); >30% (total porosity).

Water permeability

<15 mm/hour.

Manufacturer guidance

Saturated hydraulic conductivity.

Permitted materials for manufactured growing medium

-

Declaration of compliance

-

Composted materials

In accordance with PAS 100.

Electrical

>150 μS/cm.

Manufacturer guidance

Electrical conductivity.

Sustainability data

Contains Red List materials

No

Country of material origin

United Kingdom

Country of product manufacture

United Kingdom

Literature

BLRG Rain Garden Soil Spec Sheet

BLRG Rain Garden Soil Spec Sheet

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