Verified by manufacturer 3 months ago
BBA Agrément Certificate
Certificate type
A drainage and water storage element for extensive green roofing.
Suitable for Extensive Green Roofing and for use as a Drainage Element.
MedO D25 provides both passive irrigation for any green roof system installed above it whilst also permitting free passage of excess rainwater below.
Cuspates in the board allow rainwater to be stored for passive irrigation during periods of dry weather. Drainage holes in the upper layer permit any excess rainwater from overfilling and potentially saturating the green roof system above.
MedO D25 has also been successfully tested as a permeable drainage layer beneath fully-bedded finishes, working in conjunction with permeable mortar beds to provide surface water management and drainage on larger areas, such as podium decks. In this arrangement, the board is not intended to be storing rainwater, so it is placed upside-down when functioning only as a drainage element.
MedO D25 is loose-laid and boards can be butted together or overlapped by one cuspate for larger green roof areas.
When used beneath a Green Roof System, MedO G11 Geotextile Filter Membrane must be installed above to prevent small fines from reaching the drainage network.
A drainage and water storage element for extensive green roofing. Manufactured from recycled polystryene Radmat D25 is chemically neutral, rotproof and resistant to mould and bacteria.
Radmat D25 is supplied in sheets 25 mm deep and is resistant to compression up to 238 kPa.
Color | Black |
Finish | Unfinished |
Material | Polystyrene |
Shape | Rectangle |
Length | 2020 mm |
Width | 1100 mm |
Height | 25 mm |
Uniclass | |
CAWS | Q37/355 Combined layers Q37/340 Moisture retention mat Q37/350 Drainage layer Q37/360 Filter membrane |
Physical properties | |
Capacity | 11.80 L/m². |
Fire protection | To BS EN 13501-1: B2. |
Studded layer | Recycled Polystyrene. |
Filter layer | Recycled Polystyrene. |
Sheet thickness | 25 mm. |
Weight (minimum) | 1360 gr/m2. |
Colour | Black. |
Contains Red List materials | No |
Country of material origin | Europe |
Country of product manufacture | Europe |
Recyclability | 100% Recyclable |
Recycled contentAs defined in clause 7.8 of BS EN ISO 14021 | 100 % |