![]() ![]() For a rectangle just multiply the width and length of its two sides to obtain area. ![]() If you are working with hips and gables and you want to get precise area measurements you may find it easiest to divide the individual roof slopes up into sub-components: a rectangular part and a triangular part. Well this is only true provided the roof surface is a rectangle.RL is simply the building width plus the amount of overhang at the two gable ends of the building. RL = Roof Length = dimension of the roof from one gable end of the building to the other.Remember to include in the amount by which the roof extends out over the building walls – its eaves. In my sketch I use or the dimension of the sloping surface as RW. RW = Roof Width = dimension from ridge to eaves.tape measure you can extend the tape out to catch the roof eaves without having to walk dangerously close to the roof edge. If you have safe access to the roof surface you can quickly make the needed area measurements: just measure from the ridge to the lower edge or eaves, keeping your tape straight. ROOF RAFTER CALCULATOR – Estimate Rafter Length, Cost and Quantity ![]()
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