A temporary patch for a leaking garage roof

John Conlin / 12 September 2018

A reader wants to know how to patch a hole in his garage roof.



Question

I have a double garage. Although the concrete walls and floor are in good condition the corrugated roof leaks in several places. My roofer has tried patching but eventually this stops working. I wonder if there is anything that can be done, possibly from inside, as a short term solution as the property may be redeveloped in five years or so.

Answer

I think anything inside is problematic as the water it collects would need to drain off somewhere. You do not mention whether the roof is metal or asbestos - if the latter great care is needed and minimum disturbance is essential.

No repair will be permanent but I suggest that wherever daylight is showing inside your roofer should patch outside with adhesive ‘flashband’ and then give the entire external surface a good coat of a reinforced acrylic plastic compound such as ‘Evercryl’ or ‘Flexacryl’ which contain synthetic fibers that help to seal small gaps and cracks.



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The material is for general information only and does not constitute investment, tax, legal, medical or other form of advice. You should not rely on this information to make (or refrain from making) any decisions. Always obtain independent, professional advice for your own particular situation.