Mine was an 8’ wide, and the addition goes the 50’ length of the trailer which widens the Living room and the master bedroom to 16’ and adds a small bedroom. The leaves were on the addition’s flat rubber roof which was collecting water because of the leaves. I brushed off as much water as I could and hope that the sun would dry out the rest.
No leaks inside though, thank God!
My sister had a trailer with an addition all along the side which expanded the living area quite a bit.