Yes, I think Paddy's Wigwam had a few probs with water ingress too. My nephew is an architect (in Norway) and I guess he sees his job as purely artistic/conceptual. When I asked him how he could be sure his creations would stay up, he said, "Oh we leave that to the structural engineers". In fairness, he does have a slightly wicked sense of humour, but there may be some truth in it.Regrettably, the more knowledge architects and builders acquire, the less able practically they seem to be. I doubt that anything built in the computer age will survive a century.