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when must a saddle be installed on a chimney

by Prof. Nayeli Feil Published 3 years ago Updated 3 years ago

30 inches

Full Answer

What is a chimney saddle and do I need one?

A chimney saddle is a critical part of chimney flashing that protects the chimney (and the rest of your home) from wear and leaks. If your chimney needs a cricket, you can reach out to a local roofer through IKO’s Contractor Locator to have one installed.

How to install metal flashing on a chimney saddle?

If you’re installing metal flashing on your chimney saddle, this is the last step you’ll perform during the chimney flashing installation. You must first install base flashing, step flashing up both sides, and then slide the metal cover over the saddle. Nail it in place on the deck, and not on the chimney.

Why do I need a chimney cricket or saddle?

Whether the problem is caused by the chimney’s size or location, the water pooling around it can seriously damage the masonry or cause water damage to your home. Fortunately, there is a simple solution: a chimney cricket or saddle.

Does a chimney need to be connected to the roof?

In its Fortified Home program, the Insurance Institute for Building and Home Safety (IBHS) requires that the chimney be adequately connected to the roof framing to prevent the chimney from collapsing or breaking away during high winds.

Do all chimneys need a cricket?

Not every chimney needs a cricket. If your chimney is 30 inches or more wide, the NFPA 211 Standards and the International Residential Code state that a cricket must be constructed to certain specifications. A properly-constructed cricket keeps water away from the chimney by directing it down the sides of the roof.

Do you need a cricket behind a chimney?

Remember, you need a cricket behind your chimney to allow water to continue flowing properly down your roof. While this is extremely important, installing crickets is actually a building code.

What size chimney requires a cricket?

Required by Code According to the code, any chimney more than 30 inches wide must have a cricket installed perpendicular to the slope.

How do you frame a chimney saddle?

3:3017:26Chimney Cricket Part 1 - Framing - YouTubeYouTubeStart of suggested clipEnd of suggested clipFirst thing i'm going to do is level the ridge. Now that i got my roof pitch angle i'm just going toMoreFirst thing i'm going to do is level the ridge. Now that i got my roof pitch angle i'm just going to saw through.

What is a chimney saddle?

The purpose of roof crickets, also called “chimney saddles”, is to divert water, snow, and debris around your chimney, preventing pooling near the base. The cricket sits on the uphill roof slope behind the chimney (on the high-side) and is a custom-built home improvement upgrade for your residence.

How do you flash a chimney saddle?

0:142:29Flashing a Framed Chimney w/a Cricket - YouTubeYouTubeStart of suggested clipEnd of suggested clipBelow the chimney use peel-and-stick to flash the roof to wall joints. Making sure to overlap theMoreBelow the chimney use peel-and-stick to flash the roof to wall joints. Making sure to overlap the upper pieces over the lower pieces. Cover the cricket with peel-and-stick membrane.

What does a cricket do on a chimney?

According to the National Association of Certified Home Inspectors (NACHI), a chimney cricket is a small peaked roof which is installed on the back side of your chimney to deflect water and debris from your chimney.

How tall should a chimney cricket be?

Chimneys shall be provided with crickets where the dimension parallel to the ridgeline is greater than 30 inches (762 mm) and does not intersect the ridgeline....R1003. 20 Chimney Crickets.ROOF SLOPEH8:121/3 of W6:121/4 of W4:121/6 of W3:121/8 of W1 more row

Do all roof valleys need flashing?

Closed valleys aren't required to have metal flashing, but they should have additional underlayment lining the valley, preferably a couple layers of roll roofing.

What is a saddle on a roof?

A saddle roof is a roof form which follows a convex curve about one axis and a concave curve about the other. The hyperbolic paraboloid form has been used for roofs at various times since it is easily constructed from straight sections of lumber, steel, or other conventional materials.

How do you install ice and water shield on a chimney?

0:132:10Russell Roofing: Ice and Water Shield - YouTubeYouTubeStart of suggested clipEnd of suggested clipAnd water shield which is a watertight membrane kind of has a granulated surface that's been put allMoreAnd water shield which is a watertight membrane kind of has a granulated surface that's been put all along this area around the chimney 18 inches out from the chimney.

How do you build a cricket on the back of a chimney?

1:527:58DIY: Metal Roof Cricket Behind a Chimney - YouTubeYouTubeStart of suggested clipEnd of suggested clipWe got the ridge at the top where it's going to taper down to zero way up. Here. So if you need toMoreWe got the ridge at the top where it's going to taper down to zero way up. Here. So if you need to bend a piece of flashing. You can just screw some two-by-fours.

Why is water pooling around chimney?

Along with preventing water from pooling along the base of the chimney, it also prevents ice dams from forming on the roof. Ice dams stop snow and water from flowing down the roof. As more snow and water accumulate on the ice dam, it puts pressure on the roof.

What is a chimney cricket?

A chimney cricket or chimney saddle is a customized flashing solution specifically designed to prevent water, snow and debris from collecting around the base of the chimney.

What is a cricket chimney made of?

It is made of water resistant metal such as galvanized steel, stainless steel or aluminum. The angled sides of the chimney cricket direct rain, snow and debris down its surface. It is then able to run down the slope of the roof. If water is pooling around your chimney, it is a smart leak prevention tool to invest in.

Why does water break down a chimney?

When water seeps into bricks and mortar, it begins to break them down. As the water freezes and thaws, it deteriorates the masonry eventually causes cracks and breaks.

How big should a wood block be for a chimney?

Wood blocking should have minimum dimensions of 2 inches x 4 inches and should be continuous around the chimney framing.

Why do chimneys protrude?

It is common for chimneys to significantly extend or protrude above roof surfaces in order to provide sufficient “draft” for the venting of products of combustion. This tends to expose the chimney surfaces to higher wind pressure differences than those acting on the field of the roof assembly.

What is the principle of waterproofing a chimney?

The fundamental principle of waterproofing the connection between the roof assembly and the chimney is to connect the water control layer of the roof assembly to the water control layer of the chimney.

What is the principle of waterproofing the connection between the roof assembly and the chimney?

The fundamental principle of waterproofing the connection between the roof assembly and the chimney is to connect the water control layer of the roof assembly to the water control layer of the chimney. In high wind zones, a fully adhered roof membrane underlayment should be installed over the roof deck sheathing.

How wide should a chimney be for a saddle?

However, most specify that you need a roof saddle if you have a chimney that is wider than 30 inches. Note that you should measure the width of a chimney on the side that is parallel to the ridge. This is the side that is at risk from pooling water.

How do I install flashing on a chimney?

If you’re installing new flashing on a chimney without replacing the shingles on the whole roof, you’ll need to remove all of the layers of a roof around the chimney down to the decking. This includes the flashing and shingles.

How much does it cost to install a cricket on a roof?

The cost of your roof cricket installation will vary depending on your location. Expect to pay at least $100 for the chimney cricket itself, and more for its flashing or shingles.

How do I install a 2 by 4 deck?

Cut a 2-by-4 to the appropriate length, to extend from the chimney wall, and parallel to level out to its anchor point on the roof deck. Cut the end of the 2-by -4 that sits on the roof deck at the corresponding deck slope angle, so it sits flush on the deck. Attach it to the deck with framing nails of sufficient length.

Do you need a cricket on a chimney?

In building codes that require chimney crickets, there is typically an exception. A chimney that intersects the ridge does not need a roof cricket, as it will not suffer a build-up of water. Your codes may also have requirements about how high your roof cricket must extend up the chimney.

Is Jiminy Cricket a play on chimney cricket?

There is a myth that a character from the Disney movie “Pinocchio” (1940), Jiminy Cricket’s name is a play on “chimney cricket,” but this isn’t true. Other Disney movies use the phrase as a euphemism (or minced oath) for “Jesus Christ.”.

Can you nail a metal shingle on a chimney?

Nail it in place on the deck, and not on the chimney. Once the metal is in place, you must add a layer of ice and water protector on the top edge of the flashing, or the part of the flashing that is laying on the roof decking. Then you can continue with the rest of the shingle installation.

What is the best chimney liner?

A. Stainless will always be the best option when it comes to performance, durability, safety and cost.#N#A stainless steel chimney liner that is properly sized, for the stove, furnace, or fireplace will maintain or improve the venting performance (draft). If going to a Smooth Wall liner, it will additionally improve your draft by up to 20% for gas and up to 15% for oil burning appliances.#N#Our stainless chimney liners are primarily used to upgrade and repair existing chimneys. These liner systems are U.L. tested and listed, and if properly installed and maintained are extremely safe and durable. Stainless steel is suitable for wood burning, gas, or oil applications. The liner protects the house from heat transfer to combustibles while being installed in a masonry chimney. In the NBS tests, unlined chimneys allowed heat to move through the chimney so rapidly that the adjacent woodwork caught fire in only 3 1/2 hours.

Where to measure stainless steel liner?

This will depend on what you are connecting. A stainless liner going through a thimble hole, will be measured from the center of the hole to the top of the chimney. A liner going to an insert or stove in the fireplace will be measured from the top of the chimney to the top of the insert or stove or the center of the hole on the back of the stove.

Do you need a tee connector for a chimney?

Not all installations require a Tee Connector, but if yours does, it doesn't get any easier than this. When a Tee is needed and the masonry chimney has little or no offsets, connect the Tee Body to the bottom of the liner with the attached clamp, the Tee Cap should be attached to the bottom of Tee Body.

Can you use a round flue liner on a fireplace?

A. Probably not, most everything can be installed with a Round liner, with the exception of some liners for fireplaces. Larger is not necessarily better when it comes to your flue liner. Too large will give you a slow draft and poor performance, and too small will restrict the draft.

Is stainless steel a good liner for a chimney?

tested and listed, and if properly installed and maintained are extremely safe and durable. Stainless steel is suitable for wood burning, gas, or oil applications. The liner protects the house from heat transfer to combustibles while being installed in a masonry chimney.

Is stainless steel chimney liner corrosion resistant?

An affordable alternative to repairing or rebuilding the chimney and much easier to clean. Lifetime Warranty because the stainless steel liner is a corrosion resistant liner you can expect the liner to last a lifetime, virtually maintenance free. Q.

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