How to Repair a Tear in the Roof of a Metal Storage Shed

One Methods:Alternative

If there is a tear in just a flat area of a shed roof, and it does not involve any non-flat area, here are a couple of possibilities.

Steps

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    First, if there are distortions in the rip, but all the metal is still there you can straighten it. Get someone to hold a heavy timber against the damaged area as you use a hammer to straighten the metal as best you can. Once straightened, be sure any distortions are up toward the sky so that the inside surface is as straight as possible. This alone, at least, would minimize the amount of rain entering while you finish the patching.
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    Get some good exterior caulk and a piece of solid board or exterior plywood large enough to fit as a patch underneath the damaged area. Be sure it completely covers the damaged area.
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    Have someone support the the area from beneath with a backup timber while you drill small screw holes an inch or so away from the tear along both sides of the tear.
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    Put the well caulked board covering the rip from beneath and begin screwing in suitable screws that have neoprene contact seals on them from outside on the shed roof. Have a brace underneath or a strong friend to hold the patch while putting screws in.
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    Caulk the tear from above, outside and smooth it.

Alternative

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    Use sheet metal, pop-rivets and a pop rivet gun instead of the wood board and the screws.
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    Lay a strip or sheet of metal of a suitable size over the damaged area. (You will apply caulk between the patch and the roof before putting in the pop-rivets.)
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    Drill and put a screw in your first hole of the size prescribed for a pop rivet through the patch and roof. Go to the other end and do the same. Now, drill a series of holes around the damaged area, making sure the holes are aligned or staggered neatly.
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    Apply caulk between the patch and the roof.
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    Pop the rivets into place with the rivet gun and caulk each one.
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    Put a bead of caulk around the patch patch and you might spread it just slightly.

Tips

  • Caution: the sheet metal of the shed or the patch may cut like a knife so take care.
  • If you haven't set rivets, you had better practice with them -- and practice using the drill including a screwdriver bit in the drill for setting screws, if you haven't used them very much.
  • Replacement sheets may be available from the supplier/manufacturer; if it is easy enough to replace an entire sheet, then the repair may only be needed temporarily.

Article Info

Categories: Sheds and Garages