A roof is functional, so people take it for granted. Architects and engineers, on the other hand, know how important it is for any building, commercial or residential. In most cases, they prefer a flat roof because it is easier to construct than a pitched roof, especially in a commercial building. They are also relatively low cost, which is always an advantage.
Collinsroofinginc.com shares some interesting things you should know about a flat roof.
The climate in Utah swings from hot to cold. During summer, the temperature can go as high as 90 degrees Fahrenheit, and in winter it gets about 47 inches of snow.
A flat roof works especially well in hot weather because it usually has several layers, including foam insulation and elastomeric coating. In cold weather, the layers can also help trap heat in the building or home. In other words, a flat roof is energy efficient in whatever climate.
The weight of snow is not the problem, as most people believe. The supports for a flat roof are usually more than adequate to handle the additional weight.
Depending on the materials used, a flat roof may cost anywhere between $2 and $15 per square foot. A metal roof is typically more expensive than other flat roof materials because it is the most durable and lightweight. If you choose metal, you will probably save on material and engineering costs for the supports.
The cheapest material for a flat roof is concrete, and it is an excellent choice in areas of high temperature with little or no rainfall. Built-up roofs made of tar and aggregate are in the middle road in terms of costs, but it is quite heavy so you will need better support.
Flat roofs are not actually completely flat. All roofs must have a slope or pitch to keep water from collecting. In a flat roof, it is usually at least ¼ inch per foot. In a commercial building, the roof will usually have drains where the water can drain away, or scuppers in smaller structures.
Flat roofs are more structurally sound than most people believe, and have better energy efficiency than its counterparts.