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.
When you overlay a new roof you attach the new shingles or other roofing material to the existing roofing material.
That said overlaying asphalt shingles with a metal roof could be an option provided there is no underlying damage.
However this can only be done once.
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.
Metal roofs offer energy savings but do cost more upfront than traditional asphalt shingles.