Slide a new roof jack sized to fit your vent pipe over the pipe.
Proper roof jack installation.
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Determine the depth of the ceiling cavity from the center of the roof opening to the top of the furnace see dimension a in figure 1.
Ensure the chimney s base flashing is in proper order secured to the roof as the manufacturer or mason recommends beneath the shingles.
Determine placement determine the best place to fasten your first roof jack.
Placing the first roof.
Secure the new roof jack to the roof decking with roofing nails.
Nail the new shingles down with roofing nails so the nails are covered by the shingle above.
Be careful when placing roofing materials on jacks so they are secure.
Ideally locate a rafter below the sheathing.
Select the appropriate roof jack from table 2.
Roof jacks provide a stable surface to work increasing safety and making it easier to apply roofing.
In this video i show you how to install a lead flashing on a electrical pipe something that every roofer should know.
Re install any jacks that are loose or can shift.
If your roof s width is not an even multiple of the shingle s length you will have a partial piece on one end of each row.
Measure the length of a shingle as it lies across the roof.
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.
2 if slant deck flashing is used.
Cut roof shingles to fit around the roof jack and insert them under the existing shingles.
For many people out.
Most asphalt shingles are 3 feet 91 4 centimeters in length.
From inside the attic your roofing professional will drive a nail about one third of the way down from the ridge between two rafters to mark the desired spot for installation.
Do not stack material more than one layer high.
It is usually placed on the fourth.
All nails need to be carefully driven fully into a roof rafter to ensure a safe installation.
Make sure to examine each driven nail and test each roof jack before placing any planking on top.
This will help determine how the shingles will lay on the roof width.
I came across this steep roof and took this video about installing the roof jacks and the board before installing the roofing materials.
If you were not provided with base flashing you can install step flashing up the side of the chimney.
Middle jacks will help when extra material is loaded on the roof or when workers need to walk from spot to spot.
From the roof he will cut a hole the same size as the diameter of the vent.
