Single ply membranes are pre fabricated sheets rolled onto the roof and attached with mechanical fasteners adhered with chemical adhesives or held in place with ballast gravel stones or pavers.
Most efficient roof design.
Built up roofs consist of a base sheet fabric reinforcement layers and usually a dark protective.
Using sheet metal roofing might add between 20 80 to the cost and a concrete slab or thatch roofing might be as much as three times the cost.
The basic explanation is that most roofs have a slope and the degree of steepness associated with the slope is called pitch.
Using metal such as copper or zinc for the steep portion of the roof can be more expensive up front but will require much less maintenance down the road making it a good long term choice.
When designing your home also keep the shape of the roof in the back of.
Reformulate or coat black membranes to make them reflective.
How they can be made cool.
In general a double roman concrete roof tiled roof at 26 degree pitch might be one of the most cost efficient roofs.