Calculate the number of spans from the base line to the peak. Typical vinyl siding has 4″ exposure, so 3 spans would be equal to 12″ or 1 foot. Check it out.If you do not know the rise, and do not have a ladder or cannot access your roof in order to measure it, you can accurately estimate the rise by measuring 3 spans of siding. Roof Pitch Finder – If you need a roof pitch tool, this Johnson Level & Tool 750 Pitch and Slope Locator costs only $7.77 with free shipping from Amazon, and has the best user ratings. 2) Pitch to Angle (Degrees) CalculatorĮnter pitch in the first box – calculation is automatic. To calculate your pitch and size, measure your roof and plug in your measurements in accordance with the diagram below. Enter the span (also known as gable side width), and the rise above the base line.
Using the diagram below, measure your roof from the ground, and enter building dimensions into the calculator #2 above. The results will pop up below the calculate button, and will include: Rafter Length, Total Size / Area, and Pitch. To estimate roof area, enter width and length (as shown in the measuring diagram below), and either Rise or Pitch – second value will auto-calculate. 1) Calculate Roof Slope Based On Rafters Length You can also convert roof pitch to Degrees (at the bottom). Roof Pitch Calculator estimates roof slope from every possible angle.Ĭalculate roof slope, area, rafters length and other dimensions. Standing Seam Materials & Cost Calculator.These have good traction but are less likely to leave footprints on your roof. Wear clean, dry, basketball shoes or sneakers with soft soles.X Research source Consider measuring from the rake board at the edge of the roof instead. Curled shingles or other non-flat roof coverings make this method less accurate.Special scaffolding equipment is required to safely work on slate roofs, both to prevent damage to slates and to mitigate fall hazard. Never walk directly on a slate roof slates can easily be broken by stepping on them. X Research source It's best to walk on a roof when the sun is out and morning dew has evaporated. Even a mild slope can be dangerous to walk on if the roofing material is slippery, gritty (worn composite shingles), or loose (wood shakes or any worn shingles). Do not walk on a wet or icy roof, a very steep roof, or one with obvious structural damage.
Climb up a ladder without your tools to take a look at the roof surface.
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