How To Work Out A Cut And Pitched Roof

Use a pencil to jot the width down somewhere.

How to work out a cut and pitched roof. Calculate the rafter length substituting these values into the following formula. The pitch of a roof is its vertical rise divided by its horizontal span and is a measure of its steepness. A cut roof this is the traditional method of cutting the timber on site and building up the roof using rafters ridge boards joists and purlins etc the exact details being determined by the size of roof size of timbers etc. Move the tape measure along the the roof until it hits the level at exactly the 12 inch mark.

Measure the vertical distance from roof to level. You can also calculate roof pitch even without using a roof slope calculator. Roof pitch is the measurement of a roof s vertical rise divided by its horizontal run. Shingle roofs typically have a life span of 15 30 years while membrane roofs usually last 5 15 years.

High pitched roofs often need extra fasteners and their pitch can be as high as 21 12. They have a pitch ranging from 4 12 to 9 12. Measure the rise of your roof. Hold the 0 mark of the tape measure against the roof.

For example the width of the building may be 72 75 inches 184 8 cm. Although ceramic tile roofs are expensive they can have a life span of over 100 years. An angle cut is a very common cut needed for constructing rafters for any roof. Let s say it is equal to 1 5 m.

Pitch rise run 1 5 6 25. Calculate the roof pitch as the proportion of rise and run. These roofs have a pitch less than 4 12. A pitched roof is a roof that slopes downwards typically in two parts at an angle from a central ridge but sometimes in one part from one edge to another.

Knowing how to make this calculation will make your roof construction project easier and will ensure the safety and success of your roofing project once completed. There are two basic methods of pitched roof construction. Conventional roofs are the easiest to construct and you can walk on them safely. It is often compared to slope but is not exactly the same.

Rafter rise run 1 5 6 2 25 36 38 25rafter 38 25 6 18 m. Measure as precisely as possible down to the 1 4 inch 0 64 cm 1 8 inch 0 32 cm or 1 16 inch 0 16 cm.