RV Repair: roof repair, marine plywood, 5th wheel

Question
We have a soft spot on the roof of our keystone 5th wheel.  We are going to repair it but I don't know what kind of wood to buy to fix it.  We will be cutting out the spot and replacing evertying that is soft.  Do I use marine plywood?

Answer
This is a pretty easy fix what ever you pull off is what you can put on usually 3/8 osb but some times they used 1/4 inch luwan. Do not use green wood treated ect just spec grade ply wood or osb



let me know when you open it up and I can help with any thing you need