Pmullen503 wrote:The polyisocyanurate foam suggestion was how to add insulation to a 1/4" plywood roof. I would make the trailer from canvas covered XPS (at least the upper section for insulation and to reduce weight.)
Bluebunny wrote:Hi OP827,
That is one cool trailer, and thank you for the encouragement! But...ummm...FOAM??? ...you can do that?... Actually I have been intrigued by this foam craze; discovered it and this site when tnttt member Rowerwet posted his builds of a little mouse boat design in foam, which I had previously built in plywood. My challenge is that I know plywood skin structure like Bubba knows shrimp, but...foam??..you can do that?? . There may be some significant torsions in my trailer design. I believe that the lower clam will take most of the stress when on the road. When the top is raised, there may be significant wind-induced stress on the structure... I dunno foam...but I'll do some research here and elsewhere and investigate. I'm a little guilty of only thinking like a hammer, so everything has to work like a nail. I am comfortable and excited about how the design is progressing so far, but one of my unsolved problems; a thin, uninsulated plywood roof will NOT be a comfort, and I believe the solution is "don't do it like that". which is not exactly a solution. How does foam like plywood ?
While I am rambling, another unsolved problem is the dang door. Has anyone done a folding door? My door will be hung in a half-doorWAY in the top shell. The other half of the doorWAY is in the bottom shell. The door will have a piano hinge so that the lower half of the door will swing up against the top half to allow the top to lower down. When top is down and door is folded, I still desire to be able to open the door to get inside. Of course trouble-free operation is essential...
Bluebunny wrote:...OP827 says "Plywood glues with XPS rigid foam very well."
This foamie stuff sounds like a real solution! - and I can keep my precious plywood skin...
OK, so if I glue XPS to the inside of my roof, I get insulation, and I would need to cover it with something; cloth and paint I suppose - sounds good.
If I glue the XPS to the outside of my roof, I would get insulation, and better soundproofing from acorns and rain. There I would need to cover it with a more substantial skin I suppose...
What do yawl recommend - in or out? How thick?? For my hundred other questions on foam - I'll do some research. Thanks OP!
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