Standard 2 by 10 inch lumber with fit into the channel on most roof jacks and should be available at any lumber yard.
How do i use a roof jack.
When installing or repairing shingles on a steep roof you need the support of roofing jacks which are brackets that hold a length of two inch scaffolding.
Then attach the tool into rafter by driving couple of 16d nails.
So you will need to place your jacks at least somewhere in the fourth or fifth shingle course.
Ideally locate a rafter below the sheathing.
Cut roof shingles to fit around the roof jack and insert them under the existing shingles.
How to use roofing jacks.
You can use the dead area with a jack roof.
In order to use the jacks the first thing to do is to find a flat and clean area in your roof.
You can usually feel sheathing nails which are driven into rafters through the underlayment.
Use a hammer to bend the top edge of the soft lead roof jack down into the vent pipe.
Remember that most shingles can actually be dilapidated and they can easily break.
Avoid using short pieces as the risk of a length of lumber tipping upward if you should happen to step onto the end of it is greatly increased.
A roof jack will not do you any good without planks of lumber to span them.
Make sure that the roof jacks are evenly spaced from each other about 2 feet or so and from the edge of the roof.
Degrees and safety most roof jacks depend on angles.
Of course there are old homes which have an outstanding pitch of.
Standard roofs are around 3 12 to 6 12 pitches.
Ideally you should find the rafter first underneath the sheathing locate by feeling the nails.
Roof jacks make it easier to set roofing and increase safety for you by providing stable surface.
Roof jacks provide a stable surface to work increasing safety and making it easier to apply roofing.
Since there are various angles of roofs it is important to use a roofing jack according to the angle or pitch of the roof.