Assuming your trusses are 24 on center i would be inclined to use a good quality exterior grade 1 2 plywood.
Rvs using marine plywood for roof.
But with time rvers began to notice a few problems.
Having said that fiberglass rv roofs require less maintenance than rubber rv roofs which makes them preferable for some campers.
Vinyl siding 4 x 8 x 3 8 cedar plywood and batten strips any number of other less costly exterior grade 1 4 plywood even 10 sheet lauan plywood primed and painted with batten strips or if you have access to a metal brake trim coil can be braked to resemble the aluminum siding around 65 85 per 50 x 24 roll.
The minimum plywood for roofing.
I would look for exterior 5 8 plywood as a flooring and exterior 1 2 inch for roof.
Not sure what is next on the camper.
Generally asphalt tiles one of the most usual best plywood for rv roof repair system key in the u s are the most inexpensive to change.
A half inch cdx plywood is often used with rafter with 24 inch spacing.
Next off would certainly be wood and also steel roof shingles which are center of the roadway.
Keep watching if you want to see.
Many rigs that come with dynaspan and other similar products construct the floor with one seamless piece.
I have never glued rubber roofing on.
Roofs are framed with rafters or trusses which are rafters joined by internal braces so they install as a single component.
Like osb many rv manufacturers will not use the highest quality plywood.
Recreational vehicle rv manufacturing recreational vehicle rv manufacturers use apa trademarked plywood and osb oriented strand board structural panels in motor homes and mini homes in travel trailers fifth wheel trailers and tent trailers in vans pickup campers and all kinds of special order custom made and converted units.
Rafters run from the peak of the roof.
Plywood can delaminate separate when it gets wet.
It s glued and stabled down just like the factory did it.
Watch out for the home depot plywood s as many only have three ply s and or voids.
If your roof carries a heavier load like if there s less pitch and or it snows in your area a roofer may recommend the use of the inch variety.
For a while it was like that.
Said to last the life of your rv it would be a virtually maintenance free roof that should make rvers dance with joy.
I have however built a camper with fiberglass roofing.
Clay concrete and also slate ceramic tiles are where costs increase for best plywood for rv roof repair.