QDEAR TIM: I have a concrete fireplace hearth. Is it possible to cover it with slate? If so, is that difficult? Instead of slate, should I just install a hearth pad? -- Marianne C., Millis, Mass.

This blog post is about fireplace hearth extension rules, but first, a quick story to explain why I'm blogging about such a boring topic. I've said it before and I'll say it again; one learns from ...