Rockport, TX. We have been told that we need to replace our Flex Ducting. It is 20 yrs old and we need new. Never having had to replace Flex Ducting have several questions.
1. Is there a superior Flex Duct product or they all the same.
2. We have had Flex Duct 'dripping' problems. We live in a very high humidity area, Tx Gulf Coast. I have heard that the insulated Flex Ducting is more prone to this than the exposed, uninsulated, ducting. Is this true?
3. Any tips, tricks or things to watch for by you more experienced folks?

Thanks!

According to a HVAC contractor friend of mine older flex duct could not handle the heat of Texas attics and would disintegrate after a number of years. The newer stuff is good to go.

You might also seek out quotes for new rigid as well. It will be more expensive, but is superior to flex, especially in main runs, in almost every way.

Boy do I agree with all the above comments!

Flex duct can collect more crud due to how it's formed so kudos on 20 years, something to do everytime HVAC replaced. Rigid ducts are almost forever & easier to clean if upgrades are affordable. Metal ducts are forever.

Forever we have spec'd attic ducts to be covered, over insulated with SOP attic batts, blown, whatever du jour is used. Less heat transfer to attics that range from 12-140F and less prone to beach weather condensate drips.

If all else fails to solve s dripping register (vent) then a) more insluation in that area and a ways up the duct, then b) caulk/seal gaps between interior & attic, then c) plastic registers, even Amazon sells these

Kudos on a Rockport digs, we Always made a side trip through that Fantasyland of architecture.

Well, it come in R6 or R8, so that's one of the most basic decisions you have to make.