How to Install Corrugated Roofing

Two Methods:Install Corrugated RoofingChoose Roofing

Corrugated roofing is a great way to top a garden shed, shop, or patio. It's quick, easy, and you can do it yourself. You only need basic tools and materials, and to follow the steps below.

Method 1
Install Corrugated Roofing

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    Cut the panels to the length. Most panels come up to 32 feet (9.8 m) in length. Allow for a minimum of 18 inches (45.7 cm) if you need to lap to complete the run.
    Cutting tools:
    Angle grinder: The fastest option. Wear hearing and eye protection. Paint or prime cut edges to prevent rust.
    Circular saw: Slower than angle grinder, but follow same instructions. Use a metal blade and expect it to wear quickly.
    Nibbler: Effective if rated for the right metal and gauge.
    Tin snips: Slow but safe. Wear work gloves and find the longest pair you can.
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    Pre-drill holes on the ridges. Use a 3/16-inch (4.76 ml) drill bit.
    • Spacing for the holes on the ends and sides of the panels should be 6 to 8 inches (15.3 to 20.4 cm).
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    Install the panels. Place them directly onto purlins that are attached to the roof trusses, beginning on the outside edge.
    • Close or seal off the ends with a wood or plastic strip under the panel at each end. These will stop the entry of rain, wind and pests.
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    Screw down the panels. Pre-drill the holes, and use #10X2-inch (#10X5.2 cm) screws with polycarbonate washers.
    • Continue across the roof until it is completely covered, lapping over the previous panel by at least 2.5 inches (5.5 cm) minimum.
    • Adjust the lap so that the last panel completes the coverage without making a cut lengthwise.
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    Complete the opposite side. If your roof is two-sided (and not just a single slope), repeat the installation on the other side of the roof, and install a corrugated ridge cap as you proceed across with the panels.

Method 2
Choose Roofing

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    Choose the type of corrugated roofing you want to use: PVC/fiberglass, or metal. These come in various lengths, but with a nominal 26-inch (66.04 cm) width. They each have advantages and disadvantages:
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    PVC roofing. The advantage of the PVC/polycarbonate roofing is the translucency of the panels.They allow daylight to enter through them.
    • If cost is a factor, PVC is a cheaper alternative to sheet metal.
    • PVC will block out the heat from the sun much more effectively than sheet metal, which will act like a radiator.
    • Some PVC is translucent, but filters ultraviolet rays, and comes in a variety of colors.
    • The disadvantages of PVC are that it's not as durable as sheet metal, is noisy in the rain, and can easily break off during high winds.

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    Metal roofing. One of the strongest features of corrugated metal is its durability. Modern galvanized steel or aluminum is resistant to rust, and can easily last up to 100 years.
    • Metal roofing is quieter than PVC when it rains.
    • Metal roofing resists rot, is not susceptible to insect damage, and is non-combustible (a boon in fire-prone areas).
    • The downsides include a susceptibility to denting, both in installation and in the case of an during hailstorms. It can also be significantly more expensive.


  • When framing the roof, the spacing for roof trusses should not exceed 24 inches (61 cm) and purloins should not exceed 36 inches (92 cm) apart.
  • Lay the panels on the ground the way you want them to be on the roof. This helps in setting up the lap of the panels.
  • Install a corrugated roofing wall connector panel to a wall with roofing sealant when installing panels for a patio cover. Follow manufacturer's instructions for the sealant application.
  • You can use both types of corrugated roofing together, creating panels that will allow light to come through as with a clear or white fiberglass corrugated panel known as a skylight.


  • Work from the sides, using ladders or movable scaffolding, to avoid standing or walking on the panels.
  • Do not drill holes for the screws in the valley of the ridges to prevent leaks.

Things You'll Need

  • Corded or cordless electric drill
  • Straight edge
  • 3/16 inch (4.76 ml) drill bit
  • Circular saw or jigsaw with metal cutting blade
  • Tin or heavy-duty garden snips
  • Polycarbonate or galvanize metal corrugated roofing panels
  • End stops
  • Corrugated wall connectors
  • Corrugated ridge connectors
    1. 10x2-inch (10x5.2 cm) corrugated fasteners with polycarbonate washers
  • Roofing sealant (only if manufacturer of corrugated polycarbonate recommends using)

Article Info

Categories: Exterior Walls and Roof