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i use silver face foam 1" insulation in my house, the silver helps reflect light but then again, i covered up the walls with stickers to keep my mind occupied during slow times. i ripped 2x4's in half for studs. i used the same insulation on the floor (sandwiched) then put luan on top of that.
Went to sheet rock distributor and got studs today.... 1/4 the price that they are at home depot... Grinded trailer down as well going to weld a couple small cracks...(I grinded down to steel in those areas) Next is to weld base framing for bump outs.....prime and paint...
Advantech would be my choice. It holds up really well to wet/dry cycles un-painted whereas OSB will turn to potatoe chips when wetted and plywood will delaminate. Go with 7/16 Advantech and put the paint to it, will last as long as the shack does.
Anyone in the lakes region know where I can find an axle overall length 70" for snowmobile trailer? I hit up Gilpatricks salvage and bow auto salvage no luck. Yea I know I can go buy a new one...but looking to keep this low budget.