What you need power nailer or roofing hatchet tape measure roofing shovel or flat pry bar hammer drill carpenter s square straight cut tin snips utility knife chalkline broom.
Overlay shingles roof.
That said overlaying asphalt shingles with a metal roof could be an option provided there is no underlying damage.
It s good to know that you can only choose this option if your roof has not been overlaid previously.
They also last longer and stand up to foul weather better than shingles.
This has advantages and disadvantages and each of those should be weighed carefully.
An overlay roof occurs when keep your existing roof as is choosing instead to shingle on top of it.
When you overlay a new roof you attach the new shingles or other roofing material to the existing roofing material.