Fireplace Chimney Chase Construction

The rsf manual in the section about chases though they mean outer wall chases says.

Fireplace chimney chase construction.

Unlike traditional masonry fireplaces most factory built fireplaces are metal and come from the factory as complete units with a firebox a specific chimney system and all miscellaneous parts. A header essentially a 2 by 4 transom on chase front creates an opening for fireplace or insert. For wind resistance if the chimney chase is passing through the roof structure rather than abutting the roof structure end it should be framed continuously through the roof structure not. We also recommend to insulate the ceiling of the chase just as if it were in the attic space.

Properly framed and constructed the portion of the chimney chase that extends above the roof surface at a height to meet the roof clearance distances will not require extra bracing. For chimney chases built into gable walls we install a partial diverter see image 2 again extending the sloped surface several inches beyond the corner see image 3. Chimney chase a fireplace chase is essentially a knock out area of structure that hides a metal fireplace or cement blocks in a fireplace. Framing the chimney chase.

The flue connects the top of the smoke chamber to the roof through the middle of the chimney. If clay or ceramic tiles are used to create the flue in a brick chimney they are laid as the exterior of the chimney is put up. Build chase of fireplace just like any other wall structure by placing its uprights between plates and top plates to create a large box. Typically uses 2x4 structural members sheathed with osb or plywood exterior building sheathing.

If the climate in your area is very cold insulate the chase to the top to keep the chimney warmer increase the draft and reduce creosote buildup. Sketch dimensions of chase if you do not have an architectural drawing to follow. Prefabricated fireplaces factory built or prefabricated fireplaces are relative newcomers to the fireplace scene. As noted in the previous section it may be made of either brick or metal pipe.