Starting a new project this fall, building a new camper for Retirement. Getting to old for tent camping.<br /><br />I working on the framing and wondering if I am going overboard with the lumber. I will be using 2x2 for the walls and floors and support for the bed over the cab can't figure out to use 2x4, 2x6 or 2x8's.<br /><br />The walls will be filled with Owens Corning FOAMULAR® 250 extruded polystyrene insulation R10 value and glued to the having trouble attaching a fileexterior and interior walls.<br /><br />Exterior covering either fibreglass, white filon or Aluminium Siding What is better.<br /><br />Thank you all for your warm welcome<br /><br />I finely was able to upload the floor plan for the camper. <br /><br />I will start with the floor. My better half wants a built in shower and not sure to install a 24" or the next size up. It looks like it will hang off the back. Have to make her happy.<br /><br />Would it be better to use 3/4 inch or 1/2 pressure treated plywood for the exterior. <br /><br />