Planning a Budget Squaredrop Build: Design, Materials, and CPAP Power Solutions

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Member Title: First build here still in design phase.
A member from South Carolina is in the early planning stages of building a 5x9 squaredrop camper on a Northern Tool 5x8 trailer, aiming to keep costs around $3,500. Key requirements include shore power for a CPAP, air conditioning, and a practical design layout. Several experienced RVers weigh in, emphasizing the importance of detailed upfront planning, especially for electrical and structural elements. Members strongly recommend using templates for side panels and considering pre-made...
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And 1/2” plywood outer walls and floors. Is this over kill.

It is overkill. There's no reason to build a wall that heavy.

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3/4" plywood is all that is needed for wall framing.

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Also, while considering wall thickness, think about what doors and windows you'll be using.

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Tony
 
My walls are 3/4 inch skeleton, with 1/4 inch inside and 3/8 outside. I wish I'd gone with 1/4 inch exterior walls. Even my walls are overkill.

I was originally planning on stick framing mine as well, but Tony talked me into doing the 3/4 inch skeleton, and I'm so glad he did. It's much faster cutting holes out, and far more rigid that cutting individual boards and fastening them together.
 
Ok so my 5x8 trailer come in from Norther Tool. Went and got it. Instructions suck. But me abd my brother In law got it most of the way together. Still gotta mock up and weld the tongue I’m gonna use and weld up all the seams.
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It is overkill. There's no reason to build a wall that heavy.

qWNEm5C.png

3/4" plywood is all that is needed for wall framing.

ypo11uy.jpg


Also, while considering wall thickness, think about what doors and windows you'll be using.

ezR6Ook.jpg


Tony
Tony I ordered your book. I think it will help me with my planning phase. I think I’m gonna go with 3/4 plywood walls. Now for the design. I’ve got some stuff drew up on note book paper and a ruler. I’ve got some mdf I can use for a template when I finally decide on a layout.
 
Tony I ordered your book. I think it will help me with my planning phase.

Don't hesitate to ask questions. In the book, I show/tell how to easily stretch 1/4" ply for a template–and it looks like you're building a 9' long camper so you'll need to do something. The system uses fiberglass sheetrock tape and wood glue. It's simple and works well.

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Good luck,

Tony
 
Well added 1 foot to my trailer and bolted the tongue tubing through the metal on the trailer. Still gotta cut the tongue to length and put the coupler on. I also ordered heavy duty wheels that are rated for higher speed abd weight from TSC.
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Just started on my floor today. I procured some 3/4 plywood off marketplace that I used for the part that gonna be facing down. I had 2x4s so I laid them down. I’ll sandwich 1” insulation in the open cells and cover it with 1/2” plywood. The 3/4” and sides will get coated with fiberglass epoxy several coats. As a weather barrier. Then probably a coating of rino lining for added protection. I changed my mind I’m building a 5x10 the trailer is 5x9 I’m going to let 6” hang off the front and back. Ive also mocked up a tentative design. The door will be closer to the the wheel and the window will be further back than in the pic btw. I also have a drawing on graph paper that’s a lil more accurate.
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