23. July 2012
The summer months are generally subject to heavy rainfalls, which means that flat roofs are exposed to much higher levels of water. The red overflow drain from Dallmer safely handles heavy rainfall - even in the event of a veritable monsoon.
Once it starts really pouring on a flat roof, any "normal" drainage system is quickly overloaded. This poses a risk to the waterproofing and the structure of the building (see photo below). The provisions of DIN 1986-100 therefore state that it is essential to ensure the controlled drainage of even extreme volumes of rainfall. Dallmer's overflow drains offer a reliable, efficient and cost-effective solution. In the event of heavy rainfall, they drain the flat roof where the rain is actually falling and not just at the edges of the roof, i.e. the parapets.
Dallmer overflow drains comprise a high-performance roof drain with a special emergency drainage unit. Instantly recognisable as a separate system thanks to its signal red colour, the unit can be used with both single-ply and two-ply roof structures. Because the overflow drainage unit is not connected to the roofing membrane, it does not need to be integrated in the waterproofing. A thread enables height adjustment from 28 - 68 mm.
Overall, the Dallmer overflow drain is a simple concept that is both extremely flexible and highly powerful. In combination with its regular roof programme, Dallmer offers solutions for the following:
--> for roof waterproofing with Bitumen, PVC, FPO-PE, FPO-PP and polymer sealing membranes
--> with horizontal and vertical connection
--> with nominal widths of DN 70 - DN 150
--> for gravity drainage (flow rates of up to 21.5 l/s)
--> for SuperDrain pressure pipe drainage (up to 22 l/s)
--> free drainage via the parapet or with connected downpipe
The Dallmer overflow drain offers practical solutions for flat roofs and optimum safety thanks to high drainage rates.
Monday to Thursday 7:15 - 17:00
Friday 7:15 - 14:00