Metal roofing joint question

ladylola

ladylola

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Working on a flat roof at the moment which will eventually be covered in stainless steel.
Whilist looking at the drawing we noticed that the architect has specified the joint between the stainless sheets as a "reverse coulisseau joint".
Not wanting to appear a tad dim we googled it as you do but the searchs didn't turn anything up although with the word "joint" in the search we did get some results that were more concerned with the world of funny fags :shock:
My guess is that it's something like an upstanding welted joint , but can anyone enlighten us?
 
You shouldn't use a reverse coulisseau joint on the roof. It's a cladding detail so it will be a weak joint if used on a roof. I would recommend standing seam joints on a roof.
Who do you have fitting the stainless steel roof?
 
Thanks HMT , it's the standing seam that I had in my mind that I wrongly assumed was being called by the fancy name.
The roof in question is a flat with a 1 in 60 (or 1 in 80 I can't remember which) fall. I'm not sure off hand who's doing the ss work , I'll try to remember to find out on monday.
 
It's very important that an adequate vapour control layer is installed beneath the stainless steel. It sounds like a very low pitch so the detailing will be important to prevent future failure.
Hope this helps.
 
The flat section I spoke about is only a small part of the job and the majority is a pitched roof which varies in pitch a little over the whole roof. I did actually remember to check who's fitting the roof, and the contract is being done by All Metal Roofing LTD. We've worked with them before do you know them HMT?
 
Yes I know All Metal Roofing. You shouldn't have any problems with them on the job, but I'm here if you do!
All the best.
 

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