Recent content by jonny2tanx

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  1. J

    Condensation on underside of corrugated plastic roofing sheet

    Well somebody opened their mouth too soon. Checked this morning and we have condensation again :(. Last night was less windy than the one before so less through flow. In the words of Dick Dastardly, 'drat! drat! drat! and a double drat'.
  2. J

    Condensation on underside of corrugated plastic roofing sheet

    By way of update. I removed the panels on the right hand side and dropped the ones on the left side to leave a gap of about 9" at the top. The roof was completely dry on the underside this morning - there was rain on one end of the decking which had blown in, but the condensation seems to have...
  3. J

    Condensation on underside of corrugated plastic roofing sheet

    Quite similar to ours in design. You seem to have plenty of cross ventilation which I was hoping may be the issue with ours. I dropped the polycarbonate panels from one side and opened the doors and removed one panel on the other side yesterday to test the theory. By the time I had done that and...
  4. J

    Condensation on underside of corrugated plastic roofing sheet

    Thanks for your reply. That was the conclusion I was drawn to, the lack of cross ventilation. There is no heating - we ain't that rich 🤣. I have removed the panels from the left side and will open the doors on the right side to see if that makes a difference before cutting holes in them for...
  5. J

    Condensation on underside of corrugated plastic roofing sheet

    It's not that rough. It's the coating that tints it blue. It's a re roof of a roof that lasted 16 years using the same profile but translucent, on the same frame, and we never had problems with that roof. All I can imagine is the lack of direct cross ventilation with the polycarbonate replacing...
  6. J

    Condensation on underside of corrugated plastic roofing sheet

    Thanks for your reply. The previous roof was the same stuff - mini profile corrugated sheet, but clear and not translucent. The translucent is slightly rough on the underside. The cost of twin wall was ridiculous in comparison (largely the support bars needed). I have attached some photos that...
  7. J

    Condensation on underside of corrugated plastic roofing sheet

    We have a pergola type of thing covering an area of decking outside our summerhouse. The pergola is covered in opaque corrugated plastic roofing sheet and the ends have reclaimed twin wall polycarbonate sheeting (thanks to our neighbour removing a conservatory) from 2" above the decking to the...
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