Rip cut the shingles for the first course so they butt up against the third course of existing shingles and are even with the front edge of the starter course.
How to add new shingles to existing roof.
Remove the ridge caps.
Use a roofing shovel.
Cut the existing shingles and pry up carefully.
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The next step in the process is to install a valley board over the old shingles.
Remove the cover and then nail the old shingles back down again.
Starting two courses higher than where the new ridge meets the old roof unseal the shingle tabs a thin flat bar or a joint taping knife works well and pop the nails of the overlying course.
Install new shingles to the lower edge of the opening.
The very first step is to set up the trusses or rafters of the addition s walls so that.
If you nick or tear the old flashing piece then go buy a new one.
By margaret of lotus ca question.
How to tie into existing roof shingles step 1.
You need to tear off the roof and install a new one.
Building the new roof.
After the addition roof is framed and sheathed snap a line on the existing roof shingles 2 in.
Install the valley board.
Dave gives her some advice to help her with this project.
Up from the valley center and cut through the shingles and underlayment.
Nail the shingles just above the tab slots.
Doing it now will make it easier to keep the job clean.
Remove air vents and pipe flashings by prying out or unscrewing the fasteners holding the.
How to roof over existing shingles step 1.
There are already two layers of shingles on your roof most building codes only allow two layers of any type of roofing on your home.
Their tab slots should not line up with the tab slots of the starter course if there are any.
I am replacing a deck with a covered porch.
So if there are already two layers the choice is made for you.
Take careful measurements to determine how many trusses you will need.