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Estimating a roofing job depends on a range of factors such as the roofing material, the accessories, the labour cost and the kind of roofing job needed. A typical job involves accessories such as roll roofing, starter strips, underlayment, drip edges, hip & ridge shingles and valley flashing. It is easy to estimate the cost of roof material by calculating the area. To start the work, the estimate of quantity of each material should be derived from calculations of the dimensions of the roof.

Cost of material depends on shapes

A roof can be designed in various styles and shapes. The shapes involves a combination of rectangles, squares, triangles and trapezoids. The area may involve calculations related to the basic shapes. One of the commonest forms is the roof without any projections and it may involve simple rectangle shape. The complex ones are made with intersecting wings and projections, which involves calculations of planes and the area. These may involve a number of subdivisions that is added to estimate the total area, which is finally calculated to estimate the job.

Steps to measure the roofing estimate

· Measure the total area, calculated from the area calculations of the shapes, involved in measurements.

· If any material is available, the condition of the material is assessed to find out if the material can be reused, or it requires complete replacement.

· The cost of material used for building the roof can be calculated from the determination of the cost per square. The total number of squares used can be multiplied to the cost per square.

· The cost of labour, taxes and transportation can be added to the total cost.

· The total cost depends on various other factors such as the location of building, the height of the building, the access to material, the weather conditions etc.

Tips to Estimate a Roofing Job

1. Prior research in companies saves trouble in the later stage.

2. Before ordering for the job, the material and price should be compared.

3. Proper combination of color and material should be used for replacing the roof.

4. Quality material should be used to ensure security of the building and to prevent rework in the later stage.

5. The material should be installed properly by experienced workmen.

6. Good material and efficient work will reduce the risks of leakage. It will also help to maintain the beauty of the building.

7. The work related to the insulation and sealants should be properly done and the cost should be used to calculate the total cost. Generally, a thicker insulation is installed to reduce the level of seeps or heat into the house.

8. The cost may involve extra cost of salary and training to the workmen. In such conditions, the contractors may make a high estimate of cost.

9. References from reliable customers of the contractors can provide the needed information about their job and reliability.