We have a wooden cratch with canvas covers with integral soft plastic windows with zipped over covers. This covers our prow deck where the floor level is the same as the rest of our boat with bench seating running round the prow and a table giving us a useful dining area. Problem is that despite good quality canvas covers and copious PTFE spraying when it rains heavily water does get in, its damp and the upholstery is getting watermarked. It's a great little facility in the summer but although we have a couple of fin radiators in there it can still be a bit chilly in winter. We are considering replacing the canvas with some form of rigid structure with double glazed windows so the area is warmer, less damp and we can use it more.....a bit like a conservatory ! Anyone out there have anything like this or seen on other nb's pls ?