CG gravel layer retention

Ecological value
20%
Water storage
60%
Care and maintenance
10%
The gravel layer retention system design is an effective way of delaying rainwater runoff and adding it to the natural water cycle through evaporation. A gravel roof is usually a flat one with gravel tipped on top of it. A gravel layer at least 7 cm thick provides protection from ultra violet rays and therefore prevents heating building up on the roof’s surface. The gravel acts as a filter for the rainwater, which means that run-off is not slowed down by dirt. Good drainage on the gravel roof means that rainwater quickly runs off and therefore makes the waterproofing membranes last longer. At the same time, the weight of the gravel layer prevents suction during gales.

Use ClimaGrün’s own configurator and solution finder to obtain an overview, detailed system planning and calculation of the costs in no time.

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1Round gravel CG-RK 15/30

Round gravel CG-RK 15/30 as load material to protect the waterproofing.

2Filter fleece CG-FV 200

Filter fleece CG-FV 200 prevents fine particles from being washed into the drainage layer and guarantees high water permeability.

3Retention module CG-RM 90

Retention module CG-RM 90 for extensive and intensive green roof, as well as the corresponding coverings, for temporary or permanent water storage.

4Protection & Storage Fleece CG-SSV 500

Protection & Storage Fleece CG-SSV 500 to protect the roof sealing with separating and water storage function

Retaining element with restrictor CG-AED

Retaining element with restrictor CG-AED for object-specific adjustment of a defined restrictor discharge.

Inspection chamber CG-KS 40 h10

Inspection chamber CG-KS 40 h10 for use above roof drains on extensive and intensive roof areas with negative pressure roof outlet.

Chamber elevation 40 CG-KSE 5

Chamber elevation 40 CG-KSE 5 as extension element for the inspection chambers CG-KS 40 h5 / CG-KS 40 h10 (Item number: 201020 / 201030).

Technical info

Weight* approx. 120-200 kg/m²
System height approx. 17 cm
Roof pitch
Load material Round gravel
Run-off rate Object-related adjustable
Retention volume approx. 80 cm l/m²
Water storage approx. 0-80 cm l/m²
* Temporary water backwater in the retention volume is not taken into account.

Extra products and add-ons

Tenders made easy

  • Protection & Storage Fleece CG-SSV 500
    ClimaGruen protection & storage fleece CG-SSV 500 for the protection of the roof sealing with separation and water storage function and the following properties: Material PP (polypropylene) - recycled fibres, nominal thickness approx. 3,0 mm, weight approx. 500 g/m², water storage capacity approx. 2,0 l/m², static puncture resistance (EN ISO 12236) approx. 1.800 N, geotextile robustness class GRC 3, supply and lay professionally with 10 cm overlap.
  • Vertical protection mat
    Supply construction protection mat type CG-BSM 6, for the protection of waterproofing at the edge area, and install according to planning specifications.
  • Retention module CG-RM 90
    ClimaGruen retention module CG-RM 90 for extensive and intensive green roof, as well as the associated coverings, for temporary or permanent water storage with the following properties: Material recycled polyolefin made of PP (polypropylene) - PE (polyethylene), nominal thickness approx. 90 mm, weight approx. 8,0 kg/m², void volume approx. 91 vol.%, retention volume approx. 82 l/m², compression strength (DIN EN ISO 25619-2) approx. 900 kN/m² at 7 % compression, supply and lay professionally.
  • Filter fleece CG-FV 200
    ClimaGruen Filter fleece CG-FV 200 prevents fines from being washed into the drainage layer and guarantees a high water permeability with the following properties: Material PP (polypropylene), nominal thickness approx. 1,9 mm, weight approx. 200 g/m², opening width O90 (EN ISO 12956) approx. 0,1 mm, static puncture resistance (EN ISO 12236) approx. 2.350 N, geotextile robustness class GRC 3, water permeability H50 (EN ISO 11058) approx. 115 l/m²s, supply and lay professionally with 10 cm overlap.
  • Round gravel CG-RK 15/30
    ClimaGruen round gravel CG-RK 15/30, for use as edge strips, for the formation of fire protection strips and as ballast material to protect the waterproofing, supply and install to the naturally compacted layer height of 7 cm. Material Natural stone, grain size approx. 15/30 mm, weight approx. 1.600 kg/m³, colour dark grey, grey, white, grain shape predominantly round and frost-resistant.
  • Retaining element with restrictor CG-AED
    ClimaGruen retaining element CG-AED for object-specific setting of a defined restricton discharge with the following properties: Material retaining element stainless steel (1.4301), material retaining adapter PVC, height approx. 210 mm, outer diameter approx. 375 mm, drain pipe diameter approx. 110 mm, accumulation cylinder diameter approx. 110 mm, stepless variable height adjustment approx. 60 mm, drainage capacity approx. 6,2 l/s, object-specific restrictor holes, weight approx. 5,2 kg, supply and install professionally.
  • Inspection chamber CG-KS 40 h10
    ClimaGruen inspection chamber CG-KS 40 h10 for use above roof drains on extensive and intensive roof areas with pressure drainage, with the following features: Material PP (polypropylene, colour anthracite, dimensions 400 x 400 x 110 mm, weight approx. 1,9 kg, UV-resistant, manhole cover tread-resistant & closable, manhole base opening approx. 31 cm, supply and install professionally.
  • Chamber elevation 40 CG-KSE 5
    ClimaGruen chamber elevation 40 CG-KSE 5 as extension element for the inspection chambers CG-KS 40 h5 / CG-KS 40 h10, with the following features: Material PP (polypropylene), colour anthracite, dimensions approx. 400 x 400 x 50 mm, weight approx. 0,7 kg, UV-resistant, side wall with inlet slots 3 mm, with connection options for drainage pipes, reinforcement with base plate for raising the elements, supply and install professionally.

© ClimaGrün GmbH – Subject to change, typos and printing errors

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ClimaGrün - CG gravel layer retention - Rating 5/5
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