How To Measure A Roof With Valleys

Measure eave to ridge and rake to valley for s4 and s5.

How to measure a roof with valleys.

S6 and s7 is from eave end to valley end as well as eave to ridge. The heel height overhang and ridge and fascia boards for both roofs will be the same. S6 18 18 2 162 square feet s7 18 18 2 162 square feet. Divide the rise by the run the run is 12.

Again we divide the roof up in sections. Next you will want to measure the full length of the roof plane. Now measure the distance between the roof and the 12 inch mark on your level. Hold that end on the roof and bring your level up until the level bubble is centered.

The blind valley roof can be used to calculate valleys for roofs with unequal slopes. Then calculate the pitch of the roof by placing a level against it angling the level so the bubble is centered and measuring the distance between the end of the level and the roof. You will mark your level 12 inches from one of the ends. To measure a roof start by measuring the length and width of the building s exterior walls and multiplying them to get the area.

Then go on to measure the length and width of your hip ridges valleys or dormers. Find the square root of the result. If your roof has hip ridges valleys or dormers just measure the length of the roof across the apex. For any roof slope expressed as x in 12 rise in run the hip and valley factor is determined by finding the square root of rise run 2.

The hip and valley factor varies according to the slope of the roof as shown in the table below. To measure a roof you will need the following tools. Valley roof the valley roof option is used to calculate valleys for 90 degree intersecting roofs with equal slopes and wall plates at the same height.