by madjack » Fri Apr 25, 2008 8:26 pm
Sean, my take is you don't need more than 1/8th" material under the AL...in fact, with .040 or thicker AL you don't actually need any substrate at all...for many years, the most popular plans out there, where the Cubby plans from Kuffel Creek and they used no ply under the Al roof skins...the acknowledged leader in the commercial TD field(Camp-Inn) used no ply under the roof skins...on our last build we did the same and will continue to do so on any future builds...this is not to say that you shouldn't use a substrate...just that it is not absolutely essential.....
madjack
p.s. we do put our ribs(struts) on 8" centers..........MJ
p.s.s. by the way...where are da pics...we just luv 'em...doanchano
...I have come to believe that, conflict resolution, through violence, is never acceptable.....................mj