Well.. I don't really know. I know that the copper drain plumbing in my house was failing and needed replacing and it was a lot younger than many abs installati

Well.. I don't really know. I know that the copper drain plumbing in my house was failing and needed replacing and it was a lot younger than many abs installations in the world that are just fine? It certainly could be the case that something like spray foam degrades over very long periods of time.. but you'd have to figure the savings from the enhanced insulation value over that period would more that pay for its replacement.