I've made three for my place, and it's damn hard work. The front one is 10'x12', the small back one is 8'x 10', (both redwood deck) and the latest is 14'x16' with Trex decking. My SIL works at a place that sells the trex, so it was cheaper than redwood. :bouncetau
Trex is great to work with, it saws easily, and you can sink the screws and hide them. It doesn't split or crack. No maintainance. The 16" centers require more lumber for underpinning, but I think it was worth it. I used extra lumber and supports around the outside, as I'm eventually going to frame it in, put a door and roof on it, and it's going to be my "mud room". [read smoking room] It will have heat, lights, chairs, and ventilation. It will also have 2 or 3 openable peepholes so I (we) can shoot magpies and starlings.:riflefire
:thumbsup: