Regarding the sound the roof emits in the rain, I do not think the ping-pong balls you mention quiet covers it. For me, it is more like BB's. I have been full-timing since this fall and it is probably the only real objection I have found to this trailer. The shells (including the roof) are an aluminum cladding around a closed-cell foam board. While effective as an insulator, it also couples noise quite effectively. I just use earplugs and forget about watching TV when it rains. Steve
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