by Nathan Stout (of AccordingToWhim.com)
I basically made the lean-to 8×12 using three pieces of plywood laying long-ways from the side of the shed. This would also require two 4×4’s for the main legs, two 2×6’s for the front and back parts, and 4 2×4’s for all the other pieces. Most of the lumber isn’t too expensive until you come to the plywood. That stuff is very expensive. One piece of 8’x4′ plywood (the thinnest, cheapest one) was $17. I decided to go cheap and skip the plywood and I bought pressboard. You know that stuff that looks like it is made of wood chips all smushed together. It’s $5 a 8’x4′ sheet so it cost less for three pieces of that than it did for one normal piece of plywood. There is a reason for that of course… pressboard is shitty. It can’t get wet or it will start to come apart. Well since I was being cheap I decided to put metal roofing ontop of it. I got a shock there too since one 2’x8′ piece was $28! Just to cover the 8’x12′ roof it would be $168!!! Sheesh! No thanks. I decided to just use the pressboard and paint it thickly (to make it last a little longer) and save up money to get the metal covering one day in the future.
UPDATE: The day I built the lean-to it was raining lightly and within the day each of the three pressboards were bowing downwards. Cheap junk. I knew this was going to happen I just think it would happen so quickly. I got some 2x4s and made cross beams and straightened them back up.
UPDATE: I got on the roof of the shed and leaned over and caulked the joints where the 3 pressboards meet to ensure that the rain wouldn’t just go inbetween the boards and leak below. I am hoping this is all I need to do for now. I might be putting metal ontop of that sooner than expected!