Roofing estimates are determined by the cost of materials, how accessible the roof is, the size of the roof and its pitch. Before hiring a roofing contractor or company, one should first check to make sure the contractor or company is currently licensed and insured.Continue Reading
One of the most essential factors used to estimate roofing costs is the overall size of the roof. Roofers usually charge by roofing square, and a hundred square foot area is the same as one roofing square. The roof's slope is also used to determine how much to charge for roofing costs. If the roof is especially steep or unwalkable, the roofers may need to use special harnesses and equipment in order to complete the job. A steeper roof might also require more in insurance costs, which increases the overall price of the job.
If roofers are able to drive an equipment truck up to the house or business, then the job might not cost as much as it would if the roofers have to carry the roofing materials to the truck by hand. The job can be especially strenuous and time consuming with a heavier roof.
Different types of roofing surfaces that can determine the final price include asphalt, slate, metal and tiles. Some surfaces last longer than others, which home and business owners should take into account when considering price.Learn more about Carpentry
To calculate the roof rafter length, determine the roof's pitch and the direction in which the rafters rise from the opposite exterior walls till the ridge, find out the measurements of the opposing shorter walls of the building, and use it and a roof-pitch table to the determine the rafter length. Finally, add the overhang measurement to this value.Full Answer >
Laying out a common rafter begins with preparing a detailed roofing plan and obtaining the pitch of the roof. Get the roof span, and make a triangle called a birds-mouth. Calculate the rafters for hip roofs falling on four sides, and use the difference to calculate the lengths of the jack rafters before laying out all common rafters.Full Answer >
To determine the minimum pitch of a roof, look at the existing roof or the material the roof is made of. Alternatively, consider the type of environment the roof is in to determine the minimum pitch of a new roof.Full Answer >
To make a roof pitch table, measure the rise and the run of a roof, and express the rise and the run as a ratio, such as rise:run. Divide the rise by the run, find the tangent inverse, express the tangent inverse as degrees, and repeat for any further rise:run measurements.Full Answer >