Commercial Roofing Cost Per Square Foot

Factors that affect commercial roofing cost per square foot

Commercial Roofing Cost Per Square FootCommercial roofing cost per square foot depends on at least nine factors. There are other factors as well but they have marginal or insignificant impact on the cost. The nine factors are the roof size, curbs, parapets or metal caps or both, insulation, roof pitch, complexity of the roofing project, roofing material, choice of roof and whether or not the existing roof has to be removed. The last factor is nonexistent if it is a new building and you are opting for a roof for the first time. Every time thereafter will require old roof or existing roof removal and every roofer will charge something for that.

It goes without saying that the larger a roof, the costlier it shall be. But the size alone doesn’t influence the cost. The roof pitch plays a significant role. The two collectively will have the most noticeable impact. Depending on the roof pitch, certain materials will have to be taken out of the list of options. A roof pitch of 1/12 or 4.5 degrees can have an impact of $1,000 or more. In effect, a thousand square feet roof which is flat will cost a thousand bucks less than a roof of the same size but having a slope of 4.5 degrees. Thereon, with every incremental level in slope or roof pitch, the commercial roofing cost per square foot will increase by a few cents. So, 9.5 degrees slope will cost a couple hundred more than a roof of thousand square feet having a slope of 4.5 degrees.

Curbs have a significant impact on cost. Skylights or chimneys and hatches will add hundreds to the cost. If you have four such installations on your roof, then the cost can increase by a thousand bucks. In effect, your commercial roofing cost per square foot will increase by a buck for a thousand square feet flat roof.

The materials obviously have an exponential impact. The cheapest material, which is unviable, will cost you around $4,000 for the whole roof. A relatively expensive and viable material will cost you in excess of $6,000. You are looking at about $5 to $10 as your commercial roofing cost per square foot.

Insulation and labor charges will also have an exponential impact on the commercial roofing cost per square foot. Depending on what and who you choose, the expense can increase by anywhere from $1 to $3 per square foot in addition to the base cost.

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