Roofing Rafter Finder

A typical asphalt shingle roof has a layer of wood based sheet material usually plywood or chipboard and normally with a layer of tar paper.

Roofing rafter finder.

Find its length with our online rafter length calculator. Measure from the center of the first rafter to the center of the second rafter. Rafters are evenly spaced so knowing how far apart they are gives you the ability to find the rafters while on the roof. Find the inverse tangent of the pitch to find the angle in degrees.

Check your results with the omni roof pitch calculator. The run of the rafter. The roof pitch calculator calculates slope pitch angle and rafter lengths based on input of rise m and run r. Rafter length calculator a useful shed roof rafter calculator to calculate the rafter length for the given dimensions of the roof of the building or a structure.

Height of the scaffold. Rafter is the beam supporting the building. Half building width minus 1 2 ridge thickness. Once you ve measured the run of a rafter simply look up the right table in the ready reckoner for your roof pitch angle and using the measurements relevant to the span of the wall plates it tells you everything from all the common rafter lengths plumb and seat angles to the length of the hips the jack rafter cuts and several others are covered too.

Rafter length calculator calculate the length of a rafter from the roof slope ratio of inches per foot and a building width measurement. To convert between american roofing ratios and pitch degrees follow these steps. The results are automatically fired. If you add an eaves overhang dimension then the amount the rafter sticks passed the wall will be added to the rafter length.

Use the diagrams on this page as a reference when inputting rise and run and while interpreting the calculated results. See rafter run to outer wall calculator below. The reason is that stud finders are designed to scan through sheet materials such as drywall or plywood that have a fairly smooth surface and consistent thickness and density. Divide the first part of the ratio by 12 to work out the pitch.

Transfer the measurements to the roof. The rise of the rafter. The length of the rafter. Calculate the length of common rafters with this free and easy online tool by entering a dimension for the roof width selecting a pitch for the roof and the thickness of the ridge.

Print full scale rafter cut templates and birdsmouth templates fold template over rafter to mark or cut through.