There is little preparation before placing on the roof. It is dissimilar to long straw in that all the butts are one way and it is dressed onto the roof to give a finish like water reed. There is some trimming of verges.
Our normal thickness is 12”-14” (300mm-350mm).
This material is not common in the eastern counties; several councils have all but banned its use. It is widely used in the south of the country and started to make inroads in the east during the late 70s early 80s. It became popular mainly because there is little or no preparation involved as with long straw.
As thatched properties were listed it became illegal to change from long straw to combed straw, several councils took legal action and it is now unusual to see a combed straw thatch taking place in this area.
If your roof has combed straw on it you can replace it with the same. Most conservation officers would prefer to see long straw used, but they cannot deny a like for like replacement.