Re: Sandwich everything - talk me out of it.
Posted: Thu Aug 15, 2019 9:19 am
If your going with any foam. Most likely you will need a foam hot knife. Most all foam will need trimed some where. A razor knife will handle sizing. It will not handle any over size thickness problems. All foam sold as half inch is actually around 5/8" thick.
If you use fiberglass. The outside ply could go down to 1/8". All the outside ply is doing is forming a mold to build the hard shell on. I would have used 1/8" ply on my build if I could have gotten it local. All I could get was 1/4" without driving 100 miles one way.
The down side to fiberglass is the sanding to get a smooth finish. If you can glass the walls before assembly makes its a lot easyer to glass smooth with little to no sanding.
If you use fiberglass. The outside ply could go down to 1/8". All the outside ply is doing is forming a mold to build the hard shell on. I would have used 1/8" ply on my build if I could have gotten it local. All I could get was 1/4" without driving 100 miles one way.
The down side to fiberglass is the sanding to get a smooth finish. If you can glass the walls before assembly makes its a lot easyer to glass smooth with little to no sanding.