Chimney Flue On Roof

Generally if you have a class 1 chimney.

Chimney flue on roof. This will help determine how tall your chimney must be. For a gas vent or type l vent this height must be 2 ft 0 61m or more. The venting capacity of a rectangular or square masonry flue if translated directly into actual or measured square inches of cross section is less than a round chimney flue of the same square inches of venting capacity. This is for masonry chimneys.

Counter flashing is placed over the step flashing parallel to the chimney. Typically chimney flues fall into three categories. Place the chimney where it would be related to the stove and mark the center of the chimney on the ceiling. Extension lengthens the roof jack connection an additional 16 in.

Flue extension 901935 features an inside diameter of 5 in an outside diameter of 8 25 in. Topping out the chimney with a cap is the same as with other installations. Seal the sides of the chimney with prebent pieces of step flashing under each course of shingles photos 4 and 5. Galvanized roofing nails about every 6 in.

For example an 8 x 8 square nominal clay chimney flue tile liner has inside dimensions of 6 3 4 x 6 3 4. When installing a chimney for a wood stove on a metal roof you ll first need to assess the position. If you decide you can handle the heights make sure to wear a safety harness. Adding the flue stretcher to the upstairs flue distances its smoke from the downward pull of the downstairs flue.

Any pipe installation above a roof that is unsupported by a chimney chase needs proper support above the roof line. Drill a small hole in this spot to mark the chimney s center. Notice that i use the words any roof surface in this explanation. Traditional chimneys class 1.

Along the edges or closer if necessary to flatten the metal. 2 by raising the height of a flue above nearby roofs or structures you wiil improve draft and reduce downdrafts. Within a shingle roof the flashing is expertly woven into the shingles or roofing materials to protect the seam between the chimney and the roof. That means that.

The kind of chimney flue best suited to your home will depend on the size and design of the chimney. These can mostly be located on older properties being brick chimneys built to allow an open fire to be lit underneath. And a length of 16 in. Nail it to the roof along the top edge.

But you won t need a storm collar if there is no roof flashing. A vertical line drawn along the up roof side of the chimney from the roof surface to the top of the chimney flue opening shall be at least 3 ft in height. This extension is designed for exterior use and must be installed above the roofline. Next see if you can access the chimney crown.

It can be made of a variety of materials depending on the type of roof and its pitch. If you have a very steep roof pitch or aren t comfortable working on your roof then this isn t a job for you. Call a certified chimney sweep.