How to install metal roof panel?

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A steel roof is long-lasting and withstands inclement weather. It is also recyclable. You can order steel roofing from a metal roofing distributor. You can buy the tools needed to install a steel roof from a hardware or home improvement store. Use these tips to install a steel roof.
Steps

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   Measure the roof.
   • Use a tape measure to determine the distance between the ridge and eave of the roof.
     
   • Add the amount of desired overhang to that measurement if you want the roofing to hang over the eaves.
     
   • Determine the roof's width.
     
   • Divide the roof's width by 3. The result gives you the number of panels that you need. For a roof that is 45 feet (13.7 m) wide, you will need 15 metal panels. Panels come in a width of 3 feet (.91 m) each, but are cut to desired lengths.
     
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   Order your steel roofing panels. Give the roof measurements to a metal roofing distributor when ordering your panels.
   
   
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   Cover the shingles.
   • This is a good time to add a radiant barrier insulation for energy efficiency or you can cover the roof with 30-pound (13.6-kg) roofing felt to keep moisture away from the roof. Leave the old shingles on the roof.
     
   • Use a staple gun or plastic cap nails to secure the insulation or roofing felt .
     
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   Lay the batten boards. Batten boards help to secure the steel panels to the roof.
   • Lay 1-by-4-inch (2.5-by-10.2-cm) pine boards over all of the roofing felt. The boards should run parallel with the ridge and the eaves.
     
   • Place the boards 24 inches (61 cm) apart from eave to ridge.
     
   • Use a drill to screw the boards into the roof.
     
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   Install the eave flashing. Eave flashing helps water to flow off of the roof.
   • Use a hammer and nails to attach eave flashing to the eaves.
     
   • Install the eave flashing along the roof's entire width. If the roof has gutters, the eave flashing should cover over each of the gutter's sides.
     
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   Apply closure strips. Closure strips help close gaps beneath the steel roofing panels where animals and pests may hide.
   • Place closure strips onto the eave flashing.
     
   • Place a drop of butyl tape sealant over the closure strip.
     
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   Install the first steel roof panel.
   • Place the first panel along 1 edge of the roof. The bottom end of the panel should hang 3/4 inch (1.9 cm) over the eave.
     
   • Screw the panel onto each 1-by-4-inch (2.5-by-10.2-cm) board.
     
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   Install the remaining panels.
   • Lay the second panel along the first panel. The high ridges that run the length of the second panel should overlap the ridges on the first panel.
     
   • Secure the second panel by screwing it onto the first panel. Place the screws into the overlapping ridges. Insert a screw every foot (30.5 cm) from the eave to the ridge.
     
   • Repeat the process with the rest of the panels. Cover the entire roof.
     
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   Install the gable trim. Gable trim gives the roof's edges a smooth appearance.
   • Apply a thin line of butyl tape sealant along the side edge of the roof.
     
   • Place the gable trim over the side edge of the roof.
     
   • Screw the gable trim into the roof.
     
   • Install gable trim on all edges of the roof.
     
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    Install the ridge cap. The ridge cap helps water to flow off of the roof.
    • Apply a thin line of butyl tape sealant along the roof's ridge.
      
    • Place outside foam closures along the roof's ridge.
      
    • Apply butyl tape sealant in a thin line along the length of the foam closures.
      
    • Place the ridge cap over the roof.
      
    • Secure the ridge cap on both sides of the peak with evenly spaced screws.
      

more https://www.wikihow.com/Install-a-Steel-Roof