[Greenbuilding] Heat loss monitoring

[Marilyn]

.
>     I collect the following information typically; one year of utility 
> bills, blower door building shell air leakage, duct blaster duct 
> leakage, all equipment, appliance, lighting information, water use (qty, 
> type, watts, model, serial numbers, energy factors, AFUE's, etc.), 

Is there any way to solve the problem of leaky ducts without ripping your walls out?

I know it's a big problem in my house, but haven't a clue it there's anything I can afford to do about it.

Thanks,
~marilyn