I'll describe job again ... anybody any thoughts ... would solid Polycarb sheet work ... if so how thick over this span ?
Need some ideas on how to achieve fitting an acrylic sheet. I have a large 'barn style' outbuilding, on 1 side it consists of 6 " square post & gallows brackets. The other side of this building is a fence, which comes up over 2/3 of the open bays. The bays are open to allow through draught of air, and air come through fence no problem, the issue is the top 1/3rd allows rain to blow in, and too much..
Hopefully this sketch will show what I mean: http://tinyurl.com/28q5u7g
I don't want to close off the bays as I need air flow (& light) ... thought about putting in a Polycarbonate sheet between the gallows brackets, just to prevent the blow in of rain. If I sloped this so that the lower edge was clear of upright posts, it should also provide a 'drip' to prevent much of the water ingress. i.e. as in sketch .. aprox 10degree http://tinyurl.com/24jt8r5 Space between each support posts is ~80"' ... and there 3 bays to do.
Assume I use something like 10mm thick sheet work ?... I can easily manufacture side & top edge supports out of wood .... some ½" x ½" either side of ends & top, would provide location slot. The issue is what to use for bottom support ... i.e. along bottom edge. 80"' is a long span ... what I need is something waterproof I can bond to sheet to provide a drip, and if it is longer than sheet would also provide a fixing point to outer face of posts.
I have thought about using 16mm triple wall (or X-Lite) in wrong direction ... i.e. ribs running left to right ... not sure if this is good idea or not. It would be a lot lighter than solid sheet.