This site is under construction. You will find detailed information not before summer 2016.
For the long-term durability of a thatched roof are several factors critical. The used material must be in proper condition and clear of pollution of course. The reed culms must lie tightly on top of each other and shape a smooth surface, but must not be squashed. The thatched roof should have a pitch of 45° at least, so that rainwater drains off quickly. Furthermore it is important, that the thatched roof after rainfalls dries off quickly. Therefore is ideal an airy, sunny place. Finally air should reach the roof not only from the outside but also from the inside. Therefore it must be back-ventilated. On the roof truss is a counter lathing brought up crosswise, on which the thatched roof is fixed. The reed culms are brought up in blocks. At first a layer of circa 10 cm is fixed, on this are slight thinner layers brought up, so that a total roof thickness of circa 30 cm is present in the end. The reed culms are all to align equally. The thicker end comes earthwards, the tip shows towards ridge. The lowest conter batten is thicker than the remaining. By this ‚protrusion‘ and the slight tapering of the reed culms to the top the culms are slightly curved inwards, after they have been fixed to the counter batten. The convex side points inwards. By elasticity and tension of the culms these are pressed tightly to the roof, so that this is mechanical stable permanently.