Home improvement (7) How to Seal Leaky Ductwork | Ask This Old House – YouTube diy projects ⋅ October 31, 2019 Richard Trethewey shows an innovative new way to seal ducts from the inside. (See below for steps.) Bookmark(0) Please login to bookmark Username or Email Address Password Remember Me No account yet? Register Do you have 10 seconds? Show this DIY to your friends and fans. Report Content To report this post you need to login first. No comments Leave a Reply Cancel replyYou must be logged in to post a comment.