The cheapest option would be to leave the old roof in place and place the new rafters over the existing roof.
Roof over existing roof.
With a traditional roof replacement we completely tear off your old roof and install a shiny new one in its place.
If a shingle is.
Use a flat pry bar.
Remove the ridge caps.
A roof over is the application of new metal or new shingles over the existing roof system.
How to install a roof over an existing roof determine the feasibility.
Inspect the condition of your current roof.
It is the process where roofers install a new roof over your existing one i e.
Sounds simple enough right.
Use premade roof trusses premade roofing trusses will be easier and take less time than installing a stick built roof.
Adding another layer of shingles or metal over an existing roof could be your best solution.
So roof replacement may not be the only option to your roofing problem after all.
Premade trusses will form the skeleton of your new roof above your old roof.
Doing it now will make it easier to keep the reroofing job clean.
Roofing over an existing roof is also called reroofing or an overlay.
Multiple layers of shingles can make it difficult or impossible for the nails to penetrate.
The roof should be in sound.
How to do it remove caps.
Hence putting a roof on top of a roof.
How does it work.
Add a new layer of shingles which means that there is no tearing off of the old roof.
Remove air vents and pipe flashings by prying out or unscrewing the fasteners holding the fixture.