I'm POSSIBLY looking for an extended depth wall thimble, preferably with an OAK hookup, for my basement stove. I need to clear a drywalled 2x4 wall, approximately a 2" gap and an 8"-10" concrete foundation wall. I say possibly because I may have it covered sufficiently DIY style. My current thimble setup consists of an 8" stovepipe section passing through the walls from slightly proud of the drywall on the inside to flush on the outside. The pipe is screwed and RTV'd together. On the outside of the thimble around the hole in the concrete, stud wall and gap between the 2 walls is Roxul batting. Same goes for the space between the thimble and vent pipe. The thimble is secured and flanged so it cannot slide in or out. What say you guys? Is my butt covered? I can't find anything remotely close to deep enough for my application and I didn't want to frame a box into the stud wall (so that I was ultimately only passing through the foundation wall), although in hindsight it would have been much easier.