How are chimneys framed?

Dimensions for a wood framed chimney chase may be as small as 24" deep x 36" wide, but are more typically 3ft x 5ft x the necessary height to meet roof clearance requirements.

How do you frame a brick chimney?

You can build a stud wall around the chimney. If the studs are wood, there must be a 2-inch space between the studs and the bricks. Because steel studs are noncombustible, they can be installed against or attached to the bricks, as long as there are no combustibles, including drywall, within 2 inches of the chimney.

How thick should a chimney wall be?

Chimneys which:

are of block, brick or stone should have a minimum wall thickness of 100mm, excluding the lining thickness. are built in a cavity separating wall should form two leaves, each a minimum of 100mm, between the flue and adjoining building.

What is a chimney surround?

A chimney surround is a metal box that encloses the portion of a flue pipe that extends above the roof: it is a false chimney. The purpose of a chimney surround is to dress up the appearance of a home by camouflaging and hiding the ugly pipes or flue pipes sticking out of the roof.Mar 5, 2015

How much clearance do you need for a chimney?

You'll want particularly to see the California Chimney Code Section 2113.19 on Chimney Clearances. Chimneys must end at least 2 feet above any section of the building within 10 feet of them, and must be 3 feet above the section of roof it is built through.

image-How are chimneys framed?
image-How are chimneys framed?

Can you enclose an exterior chimney?

You can clad a preexisting chimney that has been properly made, with an insulation barrier that satisfies code compliance, in any material intended for exterior use.


What is behind my brick fireplace?

The brick you see on the fireplace is a facade. It is attached to the firebox by mortar. You'll be able to clean up the brick behind the facade and cover them with a new flat mortar bed to install the tile or marble. ... The mortar base will provide a good substrate to set your tile.Mar 24, 2007


Can you put wood over brick fireplace?

Masonry veneers are designed to follow a very straightforward installation process. ... Typically, installing wood facing over masonry is a two-part process: First mount batts (thin wood boards) to the masonry with concrete screws and then install the wood facing over these with regular screws or nails.Mar 16, 2017


What is a roof valley?

A roof valley is formed where two roof slopes meet. Water collects in a valley to flow off the roof. Your choice of valley installation method is critical because, when improperly installed, valleys are risks for serious leaks. Essentially, there are three main ways to shingle a roof valley: woven, closed-cut and open.


What's the difference between flashing and counter flashing?

The base flashing (or apron flashing) is the bottom piece. Counter-flashing: Placed opposite to base flashing, or above base flashing, counter-flashing completes the two-part team. Step flashing: Step flashing is a rectangular piece of flashing bent 90 degrees in the center. It is used for roof to wall flashing.


What is the function of collar ties?

Collar Ties are horizontal timber beams between the rafters that stop the rafters spreading. The downwards loads of roof coverings tend to spread the rafters and push the tops of the house wall outwards.


Does a chimney need a footing?

Footers are an essential component of many masonry chimney installations and provide support for the chimney's extreme weight. A chimney footer that is poured inadequately or lacks strength can lead to major structural problems later on. As a general rule, footers should be poured at a thickness of at least 1 foot.


What is the standard chimney flue size?

Flue tile should be at least 5/8-inch thick. It is available in several sizes. The most commonly used sizes in residential construction are 8 by 8 inches, 8 by 13, and 13 by 13 (outside dimensions). Flue tiles are connected together with cement mortar joints, struck smooth on the inside.


How many bricks do I need for a chimney?

On the exterior, the chimney is brick and the wall is veneered with brick. In all, this fireplace required 75 firebrick for the firebox, about 600 brick for the backup walls and throat, 700 brick for the shell and 1,100 brick for the chimney.


What is chimney flashing?

Chimney flashing is a type of roof flashing that creates a waterproof seal to protect your chimney and roof from water damage and penetration. ... Step flashing is an L-shaped piece of metal that lies under the roofing shingles and along the brick of your masonry chimney.Sep 15, 2020


What kind of framing is needed for a chimney chase?What kind of framing is needed for a chimney chase?

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. Framing the chimney chase: typically uses 2x4 structural members sheathed with OSB or plywood exterior building sheathing.


How is the design of a fireplace related to the chimney?How is the design of a fireplace related to the chimney?

The design of residential fireplace chimneys is directly related to: 1) the area of the fireplace opening, 2) the area of the flue liner, and 3) the height of the chimney. In most situations, the area of the fireplace opening is controlled by considerations other than the performance of the system, such as aesthetics.


What kind of material is used for a chimney?What kind of material is used for a chimney?

The flue can be lined with a heat resistant material such as clay or ceramic, and protects the structure of the chimney from both moisture and the heat of the rising gases from a fire. Traditional fireplaces can sometimes be found with glass doors located on the opening of a fireplace.


How big of a chimney do I Need?How big of a chimney do I Need?

Most building codes require a minimum of 4 in. (100 mm) of bearing. Considering all the building code dimensional requirements, the minimum wall thickness of a lined chimney to be used as a structural component is 10 in. (250 mm) consisting of: 1) 4-in. (100

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