Fixed a nasty seam split with a heat gun and a prayer
Got called to a house in Tacoma last month, they had a seam open up right in the middle of their hallway. Looked like someone took a knife to it. First time I tried to re-iron it, the tape peeled right off. Turns out the original install used cheap tape and it had dried out. I pulled up both sides, scraped the old glue down to the pad, laid fresh tackstrip along the gap, and used my trimmer to shave the edges clean. Took about 3 hours total, but that seam is invisible now. Anyone else run into old tape that just crumbles? What do you do to prep the subfloor when that happens?