The Manufactured Housing Forums

Quality professional help is expensive...but you seem to have a problem that requires this knowledge...These earth quake systems require knowledge most of us do not have...From what you describe he will be doing about 1/3 the work of a new set...Which would mean the price should be in line...

1/4 to 1 inch gaps are not unusual if they are sealed with some sort of insulation..spray foam is common...A hole this size open is like leaving a 10'x6' window wide open...