Waterwings
Well-known member
Step/stagger welding should be done to avoid warping. Tig would be the way to go with thin aluminum, and the aluminum should be as clean as you can get it. I'd even think about using maybe a 1/4" thick x 1.5" wide piece long enough to go the length of the weld (skipping the cross braces of course), on the inside of the boat, which would add strength to the weld on the back-side. You won't see the backing mat'l once a floor is in. Just a thought :wink: