Fireplace Attic Chase

Chimney chase fire blocking requirements.

Fireplace attic chase. Fire stops are self describing. This is what i can tell you in the rich oxygen atmosphere of an attic i would prefere to see a prefabriocated fireplace flue enclosed within a chase sheather with drywall. They ll likely use an insulation shield for the pipe passing into the base of the chase. Once in the attic the builder will frame a chimney chase.

Holes hidden in attics basements and crawlspaces are much harder to locate and usually cause bigger problems. Regardless i ll check my sources and keep you informed. It should run from the roof decking to the ceiling joists for support. Fire blocking perhaps 3 4 thick plywood or osb fire rated is intended to slow or even prevent the movement of a chimney chase fire between building floors and to prevent the increase of fire intensity and spread by the chimney effects that would occur inside the chimney chase without fires topping.

We also recommend to insulate the ceiling of the chase just as if it were in the attic space. Interior pipe with chimney chase. However a home inspector may tell you that there is no fire stop or that it is installed wrong. Attic insulation as the chimney pipe moves through the attic you must put the attic insulation shield provided with your heatilator fireplace around the vent pipe.

Seldom do we think about the fireplace metal vent pipe running up through the attic and roof. Do i worry only about the area of the chase exposed to the outside. Inspecting the firebox clearances is more challenging. This will prevent cold air from dropping down through the chase and into the room where the fireplace is installed so my question is about the correct way to insulate.

Insulation in the chase should never come within two inches of the chimney but batt insulation needs to be cut to fit around the firestop in the chase. Due to pressure differences caused by stack e. They are installed to stop a fire in the chase area where the vent pipe runs through to get to the roof. For this installation the assembly process is the same as the attic.