The Radmat range of SWB Blue Roof Geocells provides attenuation as part of a Blue Roof system that is designed to manage and control incident rainfall at a rate in line with the SuDS strategy or the attenuation requirements for a development.

Manufactured from polypropylene SWB Blue Roof Geocells are load bearing modular units that are clipped together to form a single- or double-layer attenuation cell that is wrapped in Radmat G12 Geotextile Filter Fleece.

Features and benefits:

• Used in conjunction with rainwater outlet restrictors to control discharge, the Blue Roof is designed to be half empty within 24 hours.
• SWB Blue Roof Geocells can be finished with a green roof, paving or rounded ballast as stated below. Where a support system is being used to support roof mounted plant or equipment each foot of the support system must be placed on a 1 x 1 metre spreader plate so as to ensure load distribution.
• Green roofs can be installed over Radmat MedO D25, D40 or D80 reservoir/ drainage boards can be installed directly onto the Radmat G12 geotextile.
• Rounded ballast should be installed over Radmat DM12 drainage board to prevent the rounded ballast penetrating the Radmat G12 geotextile when trafficked.
• Bedded paving should be installed over Radmat DM12 drainage board to prevent damage to the Radmat G12 geotextile when installing.
• Paving on supports should be installed on paving supports with a minimum 200 mm diameter base.