The
traditional open construction
The traditional open construction is the thatched roof as it has been
around for ages.
The reed is fastened onto rafters.
This construction always leaves a layer of air underneath the thatch.
The thatch will only partly contribute to the insulation because of
drafts.
To meet Dutch regulations on insulation, extra insulation has to be
applied.
It is very hard to get rid of all draft.
There is no definite barrier between outside and inside.
When a fire starts in the thatch it only takes minutes before the fire
will have found its way to the inside of the house. Oxygen will be sucked
through the thatch by the fire from underneath. Once started it is very
hard for the fire department to extinguish, because it is very hard
for them to reach the fire under the thatch
Very clearly you can see the construction
The open character of this roof can be seen from the inside as well. Because
the traditional open construction is less fire retardent and has more
draft and dust, builders tend to make more closed constructions .
 
Very clearly you can see the construction
The open character of this roof can be seen from the inside as well. Because
the traditional open construction is less fire retardent and has more
draft and dust, builders tend to make more closed constructions .
If better insulation is needed, the traditional roof can have extra insulation
as part of the construction of the roof by means of an sandwich panel
mouted underneath the thatch. Or by additional insulation applied from
the inside.(afterwards) If insulation is fitted afterwards one has to
make sure a vapour barrier is mounted on the inside of the insulation
to prevent condensation of vapour inside the thatch.
more info specifications of traditional thatched
roof
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