Industrial unit guttering

8 Oct 2009
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United Kingdom
Hi All,

One of my friends has a small industrial unit with a pitched roof. On one side, the roof slopes down to a rectangular gutter which is bounded by a parapet on the outside and the sloping roof on the inside. The gutter is therefore inside the building wall and when it leaks it leaks into the building.

Like this:


The gutter is about 8 inches deep by 12 inches wide.

If you look underneath from within the building it appears to made of rectangular sections of galvanised steel sheet.

It is leaking from where the sheets join. On the roof the gutter appears to be lined with some sort of plaster or concrete material. The condition of it looks good but there are two or three hairline cracks in it, running across from the roof side to the wall side.

I'm guessing that the water is getting in the cracks and making its way down to the joins in the steel sheeting.

I was thinking of fixing it by applying a heavy coat of hot tar to the upper plastered surface of the gutter but am not sure if this is how its done professionally.

I would appreciate any advice.


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Buy a drum of Acrypol and line the gutter with it.

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seems to me like you have a asbestos/cement gutter with a sheet metal casing on the inside - Get up on the parapet wall _ Don`t put your weight on the gutter or the roof :!:

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