Certain roof slopes are safe enough to walk on without using roof jacks.
Roof jack for line set corragted roof.
Walking on a roof with a pitch of 5 12 or 6 12 is possible but it is still a good idea to place a row of roof jacks along the bottom edge of the roof.
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Ideally locate a rafter below the sheathing.
Aluminum 15 galvanized steel 28 pvc 7 plastic 40 rubber 37.
You can usually feel sheathing nails which are driven into rafters through the underlayment attach a jack by driving two 16d nails never roofing nails into a rafter.
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For a slope of 4 12 four inches of rise to 12 inches of horizontal run roof jacks are probably not needed.
Gibraltar building products 11 in.
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