Three weekends of chasing a draft, turned out to be a $9 vent flap
My living room stayed freezing even with the wood stove cranking, and I swore it was the windows after sealing them twice. Finally found a basement floor register that was wide open to the crawlspace, cost me a cheap magnetic cover and 20 minutes to fix. Anyone else waste an entire month on something this stupid simple?
A whole month of chasing drafts sounds like you skipped the easy checks first, which is on you more than the house. Five minutes with a smoke pencil would have saved you three weekends of guessing.