Reminds me of the abandoned building with a hole in its roof right near my office. That hole has been in the roof for years, and I keep expecting to see the whole thing collapse inside its brick outer shell, but it's still standing. I think wood takes a long time to rot to the point of failure under its own weight or the weight of snow. But there's no doubt that water pours inside that building with every rain and snow melt. You wouldn't want to live in there or have your stuff in there.