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You are correct that most chimney manufacturers require a 2-inch air space between the chimney and any flammable material, including framing. This 2-inch gap should not be filled with insulation. The 2" clearance between flues & combustibles are indeed enshrined in code. You are allowed to use a metal air-barrier where it passes through walls ...
I am preparing to install a stainless steel flexible liner inside an unlined masonry chimney on an exterior wall to provide draft for a wood stove. Every internet website selling the liners stresses the need for an insulation wrap to keep the vapors warm, improve the draft, and diminish creasote buildup. This has also been emphysized at GBA for similar reasons on multiple occasions. The ...
Dana Dorsett #3. Hanging anything on a chimney is a code violation, even insulation. To meet code you can build an insulated chase around the chimney with the requisite 2" of clearance, without attaching the insulation on the chimney itself. This is definitely a place where rock wool is right material, since the binders on fiberglass batts have ...
MattJF |Sep 04, 2019 08:33pm| #9. For the fire block location, put the first one lined up with the drywall, second one at the sheathing to line up with the cathedral ceiling insulation. In between install a piece of duct 2” larger than you pipe to enforce clearance and stuff the rest of the cavity with rockwool.
Insulating Outside of Masonry Chimney. I’m wondering about the efficacy of insulating the outside of a masonry chimney. The attic/loft will be used as semi-conditioned living space, and I am concerned about 1. keeping the chimney from sucking all of the heat out of this area and 2. potentially improving the efficiency of the house overall.
We are renovating a house in NJ with a masonry wood-burning fireplace that we plan to use occasionally. This week, we did some blower-door directed air sealing. In order to seal the gap between the chimney and the framing, where the chimney penetrates the roof, the contractor used generous amounts of orange Great Stuff Gap + Crack foam.
Increasing insulation on double wall stove pipe. SBFrCBwRnK | Posted in Building Code Questions on September 20, 2011 11:41am. My wood stove’s double wall insulated stove pipe goes from the first floor through the second, into the attic, and out the roof. The pipe radiates enought heat into the attic to melt snow on the roof and form ice dams ...
Some folks seem to be okay with wrapping the masonry chimney with Rockwool from the attic floor to the roof, the logic being that the concrete chimney gives the required 3″ of space, and the Rockwool of course being non-flammable. Others insist on building a stud wall set back 3″ from the chimney and insulating with Rockwool, facing with ...
This type of flashed curb is often used to install a skylight. Malcolm Taylor, a builder in British Columbia, suggests that this type of flashed curb can be used to protect a metal chimney penetration. {Photo courtesy of Pro-Tech Exterior Products Ltd., Victoria, British Columbia.] These days, new homes with woodstoves rarely get a new brick ...
Remove the exposed portion above the roof, cap/seal it, install new roofing at the hole—most effective but most expensive. 2. Cap the top of the flue—easy and cheap, and stops air but still have a thermal bridge. 3. Install a vented cap—a web-sourced solution that begs for some clarity.