It depends on the material you use, but if your flat roof is installed correctly it should last for at least 10 years, and at least 20 if a material other than felt is used. Always question a roofing company when they quote to find out what materials they use and what guarantee's they offer.
Berriedale
Berriedale is a little estate village on the north eastern coastline of Caithness, Scotland, on the A9 road in between Helmsdale and also Lybster, near to the border in between Caithness as well as Sutherland. It is protected from the North Sea. The town has a parish church in the Church of Scotland. Simply south of Berriedale, en route to the north, the A9 passes the Berriedale Braes, a steep drop in the landscape (brae is a Scots word for hill, a loaning of the Scottish Gaelic bràighe). The roadway drops down considerably (13% over 1,3 km) to connect a river, prior to climbing once again (13% over 1,3 km), with a number of sharp bends in the road-- although some of the barrette bends and various other close-by gradients have been eased recently. The impracticality (and expense) of linking the Berriedale Braes protected against the building of the Inverness-Wick Far North Line along the eastern shore of Caithness; instead the railway runs inland through the Flow Country. Berriedale is located at the end of the 8th phase of the seaside John o' Groats Path.

