How to Calculate Roof Pitch Angles
31/05/2018
Pitched roofs come in a range of different shapes, sizes and designs. One aspect in which you’ll see quite a degree of variance is the roof pitch angle. This angle gives the measure of how steep or shallow the pitch of the roof is. Knowing the angle of the pitched roof allows you to work out the most suitable roof covering for your roof and how much of it you’ll need. It will also give you a basic idea of how different roof coverings will perform on your roof, which will help you choose the most effective material for your property.
Calculating the Roof Pitch Angle
When calculating the pitch of your roof, you’re going to need a little trigonometry. Apologies to everyone who thought they’d left that subject behind forever once they handed in their maths GCSE paper.
First off, you’ll need to measure the run and the rise of your roof. The run is the horizontal distance between the roof peak and the wall and the rise is the height of the peak above the wall. Hopefully, you’ll be able to get these figures from architect’s plans or similar. We don’t recommend that anybody starts clambering around the gable end of their property clutching a tape measure.
The equation for working out the roof pitch angle is as follows:
P = 1 / tan(x/y)
…where P is the roof pitch angle and x and y are the rise and run of your roof respectively.
If your equation solving skills are a little rusty, there are plenty of online tools that can help you. Using an online roof pitch calculator, you can just enter the figures for rise and run and all the other information you need will be automatically calculated for you.
Our Services
We know that this may seem a little daunting. At RG Leverett, our professional roofing contractors will calculate all the measurements for you. We work with a range of different roof coverings from industry-leading manufacturers, which will leave your pitched roof protected for years to come.
Spotted an issue with your pitched roof? We can help, call us on 01603 418818 or email us on enquiries@roofsuk.co.uk.
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