Top Skin

Hello all,
I am building on a 5x8 trailer. Since I have 60" on the inside of the trailer, that makes the walls 1.5" thick. Now I have 63" wide from front to back. I did manage to find 5'10' aluminum which will cover the sides perfectly. Is there a way to place the skin with out having a strip going across the roof? Or is there a over the edge trim at least 2" wide? I was thinking placing the 5'x10' from the from to the back and then a long 3" strip along side it. That or a strip across. Stuck here and have no clue how to make this work. Any suggestions would help.
Thank you
Carlos
I am building on a 5x8 trailer. Since I have 60" on the inside of the trailer, that makes the walls 1.5" thick. Now I have 63" wide from front to back. I did manage to find 5'10' aluminum which will cover the sides perfectly. Is there a way to place the skin with out having a strip going across the roof? Or is there a over the edge trim at least 2" wide? I was thinking placing the 5'x10' from the from to the back and then a long 3" strip along side it. That or a strip across. Stuck here and have no clue how to make this work. Any suggestions would help.
Thank you
Carlos