Continuous roof systems are called membrane roofing. This roofs are used for buildings and tanks. They are built on flat or nearly flat roofs to prevent leaks and help drain water off.
Carefully and you wallk on the fronts of the tiles, if you step in the midle of the tile they are more prone to break, especialy if they are new.
Purlins are used on double roofs. They effectively reduce the span of the rafters and limit their size to ecenomical sections.
a roof with two pitches. seen on shaker, victorian, prarie style roofs: a lower pitch change will occur within the last 3-5 feet of the eave.
Roofs may be functionally flat or "pitched". In building construction, roof pitch is a numerical measure of the steepness of a roof. A flat roof on the otherhand, is a roof which is almost level in contrast to the many types of sloped roofs. The slope of a roof is properly known as its pitch and flat roofs have up to approximately 10°. If you have a flat roof, there is probably a leak in it or there will be a need for a flat roof repairs in the future.
the roofs in the southern colonies were most likely made of hay
Green roofs are specially prepared for growing grass or other plants on them
Green roofs are specially prepared for growing grass or other plants on them
in case of a fire and to stop leaks because there roofs were made of wood
Tiles, slates and some very old houses in rural areas have thatched roofs made from reeds.
The roofs are yellow because it was the colour of the emperor
It depends on where in Africa you are referring to. Africa is a whole continent so you will need to specify what country and area in that country you are asking about. However generally roofs are made of either aluminum or clay roofing. Roofs used to be made out of zinc but most switched to aluminum. The clay roofing is similar to roofing in hot regions in the United States such as California.
hay.
Mud.
Yes
stone
The representations of Roman houses all show them with tiled roofs. This makes sense because tiles would allow the rain water to drain off quickly and if one were damaged, it would be simpler to replace a single tile than an entire roof.