If you wish to install a wood stove or replace an insert, you’ll need to have a thimble installed on your walls. You’ll normally find thimbles installed in brick or stone chimneys at a height of 5 feet above the ground. This is installed at a 90-degree angle and serves the important function of accommodating the stove pipe.
How to install a chimney thimble?
When installing a chimney thimble with your chimney , you will need to use a high temperature cement on the outside of the thimble. Prepare your cement per the instructions on the bag. Using a trowel mix the cement with water in bucket. Check with your local home improvement store for a ready mix cement or one that will dry faster.
What is a chimney thimble port?
One of the most common discoveries that historical homeowners often come across is a chimney thimble port; a circular hole in the wall used to house a thimble. The thimble enters the flue inside the chimney and is designed to accommodate a stovepipe.
Do I need a tee connector for my 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.
What is the criteria for installing the insulated wall thimble?
The criteria for installing the Insulated Wall Thimble is in accordance with the N.F.P.A. 211 (Standard for Chimneys, Fireplaces, Vents and Solid Fuel Burning Appliances) and building codes, and should be UL Listed.
What is a chimney thimble?
One of the most common discoveries that historical homeowners often come across is a chimney thimble port; a circular hole in the wall used to house a thimble. The thimble enters the flue inside the chimney and is designed to accommodate a stovepipe.
What is the requirement for thimbles installation into a masonry chimney?
Things You'll Need The thimble is the round opening that can be found in a brick or stone chimney about five feet above floor level. The thimble enters the flue inside the chimney at a 90 degree angle and is designed to accommodate the entry of a stovepipe from a wood stove.
How do you seal a chimney thimble?
Lay a bead of cement, onto the end of the Thimble that butts against the masonry chimney. (See Figure 7) The cement will act as an adhesive and also seal the Thimble tightly to the masonry chimney should there be uneven surface. If the masonry chimney has a smooth surface the Cement will not be required.
Do I need a flue collar?
Any appliance that requires venting, including stoves and heaters, has a flue collar where gases and smoke leave the appliance and enter the chimney flue. It is usually composed of metal and may appear on the top or on the back of the stove.
When should you use a wall thimble?
Running any residential or building heating appliance, burning gas, liquid, or solid fuels through a combustible wall, will require an Insulated Wall Thimble as your passageway to connect appliances to interior or exterior masonry chimneys.
How do you install a thimble on a chimney wall?
4:426:31Wall Thimble Installation - YouTubeYouTubeStart of suggested clipEnd of suggested clipIt. And then all we need to do there's four screw holes just like outside screw it into your drywallMoreIt. And then all we need to do there's four screw holes just like outside screw it into your drywall. And that will fasten this one in place and that is it for your thimble installation.
Do you need to seal flue pipe?
Related Articles. The pipe connected to a wood or pellet stove should not need sealing unless it has a hole or leak in it. When conditions are right, the negative pressure and natural draw of the stovepipe causes the hot smoky air to rise through the pipe and out the chimney.
Should a chimney be sealed?
Sealing a Chimney Causes More Problems Than it Solves. Plain and simple, DO NOT seal off a chimney or fireplace because you will get a flue full of condensation problems! Even when your fireplace is blocked off airtight you'll still end up with “hidden” water issues. But these problems are only hidden for so long!
What do you put around a flue pipe?
For the first joint adjacent to the stove you should fill the gap with thermal rope and then cover with black fire cement, from a cartridge is the most convenient way to do this. Any other joints should be sealed with VITCAS Heat Resistant Silicone.
Do all chimneys need a liner?
A chimney liner might not seem like an important part of your chimney, but in reality, it's extremely important and improves the safety of your fireplace and home. Additionally, a chimney liner is required to be present to pass inspection for property transfer.
Will a wood mantel catch fire?
Combustibles aslo include wood trim, mantels, framing and any other object that can catch fire and burn. Fireplaces must be properly installed with adequate clearances to avoid chemical decomposition caused by heat in a process known as pyrolysis.
What does a flue collar do?
The flue collar being the part which holds the flue pipe in place on the stove. To swap over the connection then one usually just unbolts this spigot; you then unbolt the round plate off the back of the stove which covers and seals the rear connection and swap the two around.
How much clearance does a thimble need?
Insulated Wall Thimbles are designed so the thimble assembly will reduce the minimum 18 inch clearance to combustibles, to a minimum of at least 2" clearance. You should pack insulation snugly against the outside box frame of the thimble, but never place insulation into the area within the thimbles's cylinder.
Why are thimbles important?
Wall thimbles are an important component for venting stoves and other appliances since the thimble will insulate between the pipe and the wall, to protect drywall, wood frames and other materials from high temperatures and risk of fires.
Why do chimneys have fires?
A major cause of chimney related fires, is failure to maintain required clearances (air space) to combustible materials. It is of utmost importance that the Insulated Thimble be installed only in accordance with their instructions.
What is an insulate wall thimble?
Running any residential or building heating appliance, burning gas, liquid, or solid fuels through a combustible wall, will require an Insulated Wall Thimble as your passageway to connect appliances to interior or exterior masonry chimneys.
How much clearance do you need for a single wall stove?
Single wall stove pipe, going from the stove to the chimney must have a minimum of 18" clearance to combustibles. 180 degree heat shields are available for single wall pipe, to reduce clearances to 6" for walls and 9" to the ceiling.
Be Wary Of Thimble Ports
Thimble ports are great insulation mechanisms that safeguard your chimney.
Laying Out the Entry Area
You’ll need your carpenter’s pencil for this task. The thimble needs to enter into the wall.
Chipping Out the Brick Within your Markings
Having marked out your entry point or area, you’ll need to chisel out the marked area over the brick. Tools needed include the small sledgehammer and chisel.
Carefully Cutting the Flue Inside the Chimney
As you chip through or drill around your markings, you’ll encounter the flue. The side of the flue should be cut properly to align with the cut or hole being created.
Applying Mortar to the Interior
Now, your mortar needs to be applied to the face of the cut hole. It’s necessary to cover all areas of the interior clay flue as well as the brick with your mortar. A trowel should enable you to perform a neat job.
Positioning your Thimble
Having prepared the space for your chimney thimble to sit, carefully place it into the hole. Put your hands through the port to feel the joints between the thimble end and the flue. These should be flush and without any spaces.
Filling All Gaps on the Inside
Ensure that there are no gaps on the inside. The inside refers to the inside edge of the thimble and the inside face of the clay flue. This shouldn’t be rushed at all. Your hands should fee around the edges to ensure there are no gaps.
How much air space is needed between masonry chimneys?
The minimum air space clearance between exterior masonry chimneys (which have the chimney completely outside the exterior wall of the building, excluding the soffit or corice area) and combustible material shall be at least 1 inch. Do not fill any required clearance space with insulation or any other materials.
How much clearance do you need for a chimney liner?
That is where the insulated liner comes in. It makes the installation zero clearance. You must maintain at least a 2 inch air space clearance between interior masonry chimneys (which have any portion of the chimney located within the exterior wall of the building) and combustible materials.
Does clay liner need insulation?
The existence or condition of a clay liner has absolutely nothing to do with the insulation requirement for a stainless liner. It all has to do with the clearance to combustibles. In this case it is insulated so it doesn't matter but i just thought i should clear that up. jono6716 said:
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.
How thick is insulation for a flue?
Having 1/2" thick insulation will maintain your liner to the UL1777 standard. Q.
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.
