Ok in plans for my new sulcata (I dot own one yet) I'm thinking since I live in mi I need a good outdoor heated box, saw and loved toms builds thinking of doing a 4' x 5' heated plywood box... Now I was also thinking of doing a sorta green house on the front that's the same size it's probly have a plywood floor PVC or wood frame and plexi glass top and sides it'd be 4'x5' also and be almost like a sun porch... My thoughts would be that the sun would help with the heating of the "house" and the sully could come out and catch some sun even in the coldest of winter... Would the uvb from the sun be blocked by the glass?