- Aug 7, 2008
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So, the cassettes are topped with what's called a single ply membrane, it's a 1.2/1.5 or 1.8mm thick flexible 'plastic' membrane. The joints are Hest welded together, Im guessing that this has happened between each cassette but then there is a cover detail over or under the cables, then a flap that goes from the cassettes to the polycarb, this flap of single ply will allow movement between the two materials. Obviously its a little complex than I've stated,but that's the gist.Apparently when cassettes and glass panels are all in a membrane will be fitted being I am a dipstick can anybody enlighten me as I have no idea what this entails