Hi, I have just recieved a quote from a guy to knock a solid wall between my living room and kitchen to put in double doors. He advertised himself as 'construction' but it turns out he is a carpenter who can do small construction jobs. I am just concerned about the way he said he would knock the wall. He said he would start knocking from the bottom and support it from underneath as he goes up (finishing with putting in a concrete beam). Is this the correct way? The quote he gave was very reasonable but don't want to risk getting a botch job done either. Any help would be appreciated. Thanks, Kimkim.