About this time last year, we refinished our hardwood floors and had new tile put in by the front door (used to be slate...at least from the 1970's maybe earlier....house was built in '57).

Anyhow, the tile is right next to the wood floors. Most of it seems pretty secure, except right where the tile meets the hardwood the grout cracks and breaks away. The guy who did our tile explained this would happen because wood is going to expand and contract, I guess we're just a little surprised about how quickly it is happening.

Is there anything we can do to minimize this? Any sealant or anything like that? As I say, the rest of the tile and grout is in fine condition.

Thanks!