Is a hookah/shisha safe to use indoors without setting off a fire detector?
if its a flat roof w/ventilation, rubber is better. no ventilation, shingle.
A roller coaster at the top of the first hill has a LOT of potential energy. As a matter of fact it has enough potential energy to carry it the rest of the way around the track.
Firestone makes rubber sheet in 10, 15, 20, 25, and 30 feet wide and is sold by the 100 foot roll. Then that is applied to the flat roof with an adhesive. So in a sense you have an umbrella over the house. However, this is sold in black and it is a high absorber of radiant sun energy. So if you put this onto a pitched gable roof, the sun's rays would at most times be more perpendicular to the sun, and that would abosorb a lot of this radiant energy . So you can see that a flat roof most of the year has the benefit of a low angle to the sun at least in the in the US. The shingle roof, or asphalt shingles, come in all sorts of colors, from a reflective White color to even black. Those are overlaping and nailed to the plywood of the roof deck underneath of which is placed a vapor barrier of asphalt felt that is about 36 inches wide. The shingles are sold in what is known as warranty time So an expensive double layer shingle would warrant for 30 years and a cheaper one would warrant for say 20 years. So there you have it, a rubber roof works best on flat roofs, while the pitched roof, asphalt shingles are a better match for those conditions. If you have a pitched
