they didn't have a grip on anything. >> their fears were confirmed by a local inspector who came to assess the house. >> first thing he came in the door, he said uh-oh, i smell gas. i said really? oh, yes, he says, and he came over to the stove and he says here's where it's coming out of, here's the strongest smell. and the repairman discovered that there was a flexible pipe joining up the gas pipe to the stove had been crushed in the process of installing the stove and it was leaking gas into the house. >> it turns out that leaky gas was only one of their problems. >> for a while we were lying in bed and we could hear it creaking or cracking every 20 seconds, you'd hear -- just as though the timbers are sliding past each other and settling like an old house. and it shouldn't have been like that. >> the inspector also explained that the addition that birgh had built lacked significant structural support. >> so instead of supporting the house, the house is supporting it and it's gradually sinking downward. so we now have cracks in the