Wet roof

Wet roof

A wet roof is a flat roof with no significant slope, on which rainwater remains in a controlled manner through elevated drains . The water level should provide a climate buffer, similar to a green roof .

The underlying theory is that the standing water freezes in winter and provides additional thermal insulation. In summer, the cooling of the building due to evaporation should come about . The water should reduce temperature fluctuations in the building and act as a climate buffer.

However, since flat roofs are very often not completely airtight, the stagnant water often results in damaging problems.

According to current knowledge, wet roofs are no longer up to date. They have been common on flat roofs since the 1970s. In retrospect, it was a certain “fad”.

literature

• Gerhard Leder: Building constructions. Volume III: Roofing. Springer, Berlin / Heidelberg etc. 1987, ISBN 978-3-540-17705-0 .