I to built my own house on a Miltona frame. Mine is 6.5 x 14 with a 4 ft V, Am kicking around a 6.5 x 18 with a 4 ft V. My roof is a 1 piece rubber roof from Menards. it was 10x20 and cost 102.00 on sale. I have about 2600.00 in mine and its as nice as any Ice Castle. And everything was on sale...