Plywood thickness

[Dirke]

So I am building my walls with 1.5" foam insulation and 1/8" hard fiberboard on the inside and most likely 1/4" OSB (chip board) on the outside. I am going to be covering the entire outside and bottom with canvas and tightbond 3.

I'm still a bit hung up on using the OSB board. I almost bought a bunch of 11/32" plywood but decided it was too heavy and put it back.

Should I be talked out of using 1/4" OSB board? Any good reasons not to use it? It is just so cheap at $9.50 for a 4x8 sheet and it's quite lightweight. I'm having a tough time finding inexpensive 1/4" plywood in my area.

Any reason why you aren't just using foam and covering it with canvas? It would be just as strong and much lighter.

[Irving]

So I am building my walls with 1.5" foam insulation and 1/8" hard fiberboard on the inside and most likely 1/4" OSB (chip board) on the outside. I am going to be covering the entire outside and bottom with canvas and tightbond 3.

I'm still a bit hung up on using the OSB board. I almost bought a bunch of 11/32" plywood but decided it was too heavy and put it back.

Should I be talked out of using 1/4" OSB board? Any good reasons not to use it? It is just so cheap at $9.50 for a 4x8 sheet and it's quite lightweight. I'm having a tough time finding inexpensive 1/4" plywood in my area.

Any reason why you aren't just using foam and covering it with canvas? It would be just as strong and much lighter.

I'm not totally sold on doing simply a "foamie". I'm doing standard framing and the 1.5" foam is going to be installed as insulation, though it will of course add rigidity and structural support as well. I ended up choosing 7/32" plywood for the outside. It is quite light.

[rowerwet]

my floor is two layers of 3/8" ply (free for me), my sidewalls are 1/4" ply, 1/2" foam, and 1/4" inside wall. if there ever is a next time my inside wall will be 1/8". I have no metal fasteners in the structure, every joint is glued, there is a stick frame around the edges of the sidewalls, and every place a shelf, wall or door meets the sidewall. I sealed the outside with painted canvas, the inside is bare wood.
OSB is way too heavy in any size from what I can see.

[Roo Dog]

As I recall we used 15mm ply on the sides. 12mm on the floor and laminated 2X 3mm on the roof.

The whole shebang was then covered with steel sign sheet and ally checker plate on the bottom sides front and rear. The finish is the steel painted as supplied.

The number one picture was the first time out of the shed semi complete. The interior still had to done, doors sorted, decals applied and a few handles and such like fitted.

We are happy with it.

Take it easy.

RD

The camera date is out by quite a number of years. The Tear is about 18 months old. I gotta admit I am a bit slack when it comes to that sort of thing.

[48Rob]

RD,

Can you share more detail on your hatch construction?

I like the look of the hatch overlapping the roof

Rob

[Roo Dog]

Rob,

The hatch is made up of one inch ally box section with ally sheet welded to the frame. This has a sheet of steel bonded over the top of the ally sheet. It is a bit over engineered.
The hinges are common plastic garden gate from the local hardware.
Stowage is under the galley deck.
Still working on collapsible stays.

Take it easy.

RD

[48Rob]

RD,

Very well done!

Thank you for the additional information

Rob