I am thinking of opening a drywall due to sound of water dripping when furnace is running or someone is taking shower. It appears to me that the water is formed by condensation on hot air pipe, but I am not sure. So, the only way to find out exactly what's going on is to open the drywall.
Where and how do I start the project? Any suggestion will be highly appreciated. I am hoping there is a book or video I could refer to, but so far I have found nothing on this subject.
Your advices will be sincerely appreciated.
Andrew