Sealing ducts & removing old duct tape

Discussion in 'Central Heating' started by St. Joseph, Mar 8, 2018.

  1. St. Joseph

    St. Joseph

    Mar 8, 2018
    Likes Received:
    My ductwork is of the rigid, sheet metal variety, located in the crawl space of a 1966 ranch. I was surprised to see that the old style duct tape is holding up pretty well. On some joints the duct tape is starting to come off, however; and there are no screws holding the joints together — just the duct tape.

    Here's a link to a short video of my ductwork.

    My general plan is to seal the longitudinal seams, as well as the joints (elbows), with foil tape, and then brush mastic onto the elbows.

    So, here are my questions:
    1. Should I remove the old duct tape, even if it's still holding up?
    2. I know that sheet metal screws or some other kind of mechanical faster is required under building codes. But for a DIYer, can I just use the foil tape and call it a day?
    St. Joseph, ora pro nobis!
    St. Joseph, Mar 8, 2018
    1. Advertisements

Ask a Question

Want to reply to this thread or ask your own question?

You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.