I am building a "greenhouse" with 3 sides and a roof of opal corrugated plastic for my allotment. I notice that automatic ventilation windows in regular greenhouses aren't sufficient for my gardening neighbors when the sun shines on them from morning to evening. The idea is that it shouldn't get TOO bright and hot inside since I can't always be there to manage it. But to remove the slightly unattractive "shed feeling," I want to clad the walls with a stained trellis on the outside.
The valley between the corrugated peaks is 22 mm wide and 18 mm deep, and I want to lay a grid pattern with the vertical slats in the valleys against the wall studs and the horizontal slats on top of them. So I have two questions:
1. Where can you find 22x22 rough-sawn or fine-sawn slats in the Stockholm area? I see that, for example, Beijer has measuring sticks in that dimension, but they are only 180 cm and pointed. I don't want to buy expensive planed strips but the cheapest possible.
2. Would it work to pre-drill and attach both the slat and the plastic with a longer roofing screw to the stud, and are such long screws available?
