How to Work out the Cost of a New Roof

There are many homeowners that are looking to have a new roof put on their house, but they are unsure as to what factors contribute to the price of a roof.  They may know that there are the obvious factors like, roof tiles, material and labor, but many people overlook other factors such as size and type of roof.  All of these factors, or a combination of them, can be contributing factors to the final price for a new roof being put on a property.


The first thing that a person can do when they are trying to figure out the cost of the materials that go into having a new roof put on their house is to breakdown the materials that are needed and then researching the cost of these materials.  A person needs to calculate the area of the new roof that needs to be put on.  Although many people do not want to climb on their roofs and measure out the dimensions of their roof, this will allow for the most accurate figure.  It is possible to estimate if one is looking for an approximation.  The most typical roofing area unit is the “square”.  This square equals one hundred feet of surface area.  Composite shingles come in bundles that equal typically 1/3 of a square.  So, it would take three bundles of shingles to equal one hundred feet of area.

Plywood, tar paper, chimney flashing, nails, and other miscellaneous materials may be needed in order to finish a roofing job.  Research should be done in order to find out exactly which one of these are needed, depending on the job, and their appropriate prices.  Many local home improvement stores have web sites online that can give the homeowner the ability to gather costs up for their quote.  Tools such as an air compressor and a nail gun, either renting or purchasing, should be factored into the cost as well if one is attempting to replace their own roof as opposed to having it completed for them by a roofing contractor and their crew.


If a homeowner opts to have someone else do the work with their materials then they will have to find a contractor that is willing to do this.  It is important to make sure that the contractor is insured and licensed in order to protect the homeowner’s property and the contractor’s business in the case that an accident occurs.  Once a homeowner has found a contractor, the contractor will typically schedule a time to look at the property and give the homeowner a quote.  This quote will give the homeowner an idea on what the total cost of the job will be for the contractor and his crew to complete it.

For homeowners that are completed the jobs on their own they need to factor in the amount of time that will be put into completing the job, and how much time they will have to take away from other duties.  Even though this may not be a monetary labor cost, the cost of time to a busy individual, or family, could far exceed that which could be rectified by hiring a contractor.

Size of Roof

The size of the roof is an obvious factor because the larger a roof is the longer it will take to complete the job.  This means the more labor hours that will go into getting to roof finished.  More materials will also have to be purchased in order to cover a larger area.  All of these factors put together make up the total cost because of extra material and labor costs.  Roofs that have steep pitches or other unusual features will, generally, take longer because of level of difficulty and size that some of these roofs can bring with them.

Type of Roof

Lastly, the type of roof can play a part in figuring out the costs.  There are different shingles that are used for different climates.  For example, composite shingles may be warranted in one part of the world whereas a Sevilla roof tile may be perfectly acceptable in another geographic location.  It is important for the right roof to be installed for the right applications.  Also, a flat roof requires different types of roofing covering than a pitched roof does.  Certain parts of a city may also be zoned for a particular type of roof and compliance is expected in this matter.

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