For questions specifically relating to structures that ventilate combustion byproducts of fuel burned in an interior space, such as a fireplace, stove, or furnace.

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7
votes
4answers
4k views

How to I safely anchor a safety line to a chimney?

I am going to be installing an antenna at the top of my brick chimney and I'd like to be able to use a safety line with a fall arrestor. The chimney visually looks OK. I'm trying to figure out the ...
7
votes
2answers
25k views

How do I remove a chimney?

I've got a chimney in my 50's-era house that doesn't do anything. It's a regular brick and mortar chimney but it used to be used to vent the old oil heater (it's been converted to natural gas since). ...
7
votes
1answer
1k views

How to properly seal/cover an unused chimney?

We recently replaced an ancient chimney-vented boiler with a direct-vented one. This boiler was the only thing using our chimney. The chimney is brick and sits in the center of our 120-year-old house. ...
6
votes
2answers
1k views

How can I keep animals out of my chimney?

I own a three story house with two chimneys. The chimney in the center of the house has two flue liners, one of which is used by our hot water heater and the other was for a fireplace that is sealed ...
6
votes
3answers
2k views

How would one extract a brick chimney embedded in the middle of a house?

I have a no-longer-in-use brick chimney running from basement to attic (roof was closed over it), left over from earlier heating systems. The space alongside it is being used for plumbing and ...
6
votes
3answers
2k views

What's a good way to support a freestanding chimney?

I'm working on adding a woodstove to a yurt. The chimney will go out a sidewall and then head up. There is not a good way to brace the chimney to the yurt itself. Here are some options I've read ...
5
votes
3answers
10k views

Is installing a chimney liner a DIY project?

My chimney (25ft approximately, one story house) was recently inspected and the guy recommended a chimney liner for the furnace due to the grouting having been eaten away. He quoted $2000 for the ...
5
votes
2answers
1k views

Is it possible to hang something on the wall surrounding my chimney?

My chimney runs up the center of the house from the basement. Where it passes through the kitchen, there is an obvious bulge in the wall where the wall basically wraps around the chimney. Based on the ...
5
votes
1answer
609 views

How can I refinish an interior chimney pipe to make it appear rounded?

Right now my interior chimney pipe is hidden behind a wall and I want to remove that wall and expose the pipe, but the pipe itself is not so pretty. My fireplace is a wood fireplace with a double ...
4
votes
3answers
6k views

Contractor suggests caulking cracks in chimney, is that the right solution?

The mortar in our 25-year-old chimney is starting to crack and now leaks into our home if it rains hard. I assume we're probably in need of repointing, but a contractor that has done roof work for us ...
4
votes
1answer
7k views

Do gas fireplaces need chimney cleaning?

Is it necessary to have the chimney cleaned by chimney sweeping service if I use a gas imitation fireplace log (no wood) exclusively? If so, what is the reason? What is the root cause for chimneys ...
4
votes
1answer
294 views

How do I prepare a hole for concrete?

I removed a chimney from my house earlier this year. After everything was cleaned up, I was left with this big hole: I have two questions: (1) How do I know what type of concrete to use? (2) How do ...
4
votes
2answers
6k views

What should I expect when removing a chimney?

Our brick chimney is leaning away from our house. The breast is in the living room, pretty much flush with the wall. The backside starts in the attached garage, goes through its roof and up past the ...
4
votes
1answer
293 views

What is this stucco-like finish called?

The chimney is a wide column in the middle of the living room. The finish on this chimney sort of evokes brick, but I don't think it is. It reminds me of stucco, but it isn't that either. The house ...
4
votes
1answer
661 views

What could be causing this leak near my chimney?

I had a new roof put on in 2010 and had no problems... recently I've noticed that I'm getting water in my house. Its coming down along side where my chimney is and making large bubbles in my walls. We ...
4
votes
2answers
7k views

How should I install a chimney for a wood stove in my garage?

I have a new construction 24' x 48' garage that is two stories. It is partial block construction (to middle of 2nd floor) and finished on the top with wood (trusses etc). The floor plan is very open. ...
4
votes
2answers
6k views

What's the most economical way to remove a wood stove?

I just bought a new house and my insurance company is upset that I have a wood stove in the dining area. They insist that it be 3 feet from all walls and a foot and a half above the floor. ...
4
votes
3answers
3k views

How can I add a fireplace to an existing non-fireplace chimney?

Our 83 year old house has a brick chimney covered up with drywall. We have no idea where the original flue was, but it must have vented a wood stove because there is no structure for a fireplace. We ...
3
votes
3answers
252 views

Spray foam insulation around wood stove pipe

I recently had some spray foam installed in the attic and the crew put it right up against the chimney pipe. Is this a concern? Should I carve out 2" and replace with something? Pictures:http://m....
3
votes
2answers
1k views

Tips and advice for installing a chimney cap?

I have an older wood-burning fireplace that is missing a chimney cap. I'd like to install one prior to rain season here in California but would still like the ability to use the fireplace now and ...
3
votes
1answer
203 views

Is it safe to use a log burning stove in an old fireplace?

I'm renting a property which has a wood burning stove. Recently I've been investigating ways to make my house warmer (secondary glazing on sash windows etc) and started to wonder how much air could be ...
3
votes
1answer
2k views

How can I reduce whistling due to wind across a gas fireplace vent?

We have a gas fireplace venting through the roof of our attic bedroom; there's a cap on a chimney up there. Double-wall construction, such that it pulls combustion air in from outside. When the wind ...
3
votes
1answer
318 views

Previous owner filled in fireplace shelves with incorrect brick. Can I chisel them out?

My wife and I recently moved into a ranch house built in 1956. If you look closely you can see where the previous own filled in what I assume to be two little nook shelves with regular old brick and ...
3
votes
2answers
373 views

How can I air seal around a brick chimney with a metal flue liner?

We have a 1954 brick chimney that has a metal liner inside and is only used by the natural gas hot water tank. It's had fiberglass right up against if for guessing 20+ years. I'm air sealing the ...
3
votes
1answer
128 views

Should my chimney sit on my roof?

I am renting a house built in the 1940s. The mortar around the brick was cracked causing leaks. Someone had built a chimney around the outside of the original chimney. So outside it's twice the size ...
3
votes
2answers
120 views

What prevents mortar from being compressed with the weight of courses of brick?

What prevents Mortar from being compressed when courses of masonry are stacked.
3
votes
1answer
901 views

Do I have studs on my plaster and lath wall around/above fireplace?

my home was built in 1892. The fireplace was a coal burner that has since been replaced by a propane fireplace insert. I want to mount a TV above the fireplace but am uncertain as to what is behind ...
3
votes
2answers
75 views

Damp patch on the chimney wall

I have a problem with condensation on the wall between my living room and the chimney and I would be grateful for suggestions as to how to tackle this. Some background: when I bought my house the ...
2
votes
3answers
1k views

Can a Wood Burning Stove use a stovepipe made of copper for a chimney?

Planning to install woodburning stove one day. The plan includes exposed stovepipe running up through a loft space, through attic, and out to roof chimney. I know the stovepipe comes in black and ...
2
votes
2answers
116 views

Ceiling wet at corner of chimney

Whenever it rains, the ceiling becomes wet at the corner of the chimney. I ASSUME it's just a small leak, but obviously I don't want it to become any worse. I have a flat roof, so getting up there ...
2
votes
2answers
193 views

Trying to understand clearance regulations on woodstove chimneys

I'm installing a wood stove. The regulations say that the chimney top should be at least 2 feet higher than any part of the roof within 10 feet horizontally . . . from what I've read, this seems to ...
2
votes
2answers
102 views

Is there a required spacing between waste vent line and chimney?

This question seeks answers with one of the following as supporting evidence: International standards, other standards widely recognized in multiple areas of the United States, or sound building and ...
2
votes
1answer
407 views

Is it common for a chimney to separate from the outside wall?

The chimney has separated from the wooden outside wall of a pier and beam wooden home. It is 7 years old. The chimney is mortared with rock and a couple have fallen from the top. The gap is about 3 ...
2
votes
1answer
377 views

Can I insulate between a brick chimney and drywall?

Can I insulate the space between a brick chimney and the drywall inside my home? I am getting heat transfer from the brick to the drywall in the summer from the sun heating the brick. My thermostat ...
2
votes
1answer
521 views

How do I make a fire break around our chimney?

We've purchased an older house built in the 70's, and one of the two chimney's lacks a fire break, meaning that you can see direct from the basement up into the second floor. There's a gap of ...
2
votes
1answer
67 views

Can I use the old and not used anymore furnace chimney to vent out my basement?

My chimney is not used anymore. Would it be possible or recommended to use it to vent the basement ? I would clean it and install a fan at the basement end. thanks
2
votes
1answer
86 views

How can I unstick my ash dump door?

I recently had my fireplace inspected and started using it again. I went to clean the ash out and noted I had an ash dump door. This door appears to be stuck. I expect to be able to open it from the ...
2
votes
2answers
8k views

How to properly close a chimney hole in the basement

I recently removed the old unused wood stove in my basement. I now want to properly condemn the chimney. I found this question which answers what to do with the chimney outside, but I am still unsure ...
1
vote
1answer
257 views

What is the best way to close gaps between a chimney and roof from the inside?

From my attic I can see gaps to the outdoors along the outside corners of the chimney. Primarily this is a problem with both wasps and bats squeezing themselves into the attic. Also, a recent ...
1
vote
2answers
6k views

Water entering into fireplace during rain

I recently observed water is coming in the fireplace during the rain. Although it is about a drop per second or so, it is can easily fill up a small pan during a stormy and rainy day. I don't think ...
1
vote
1answer
75 views

Options for restoring or otherwise utilizing old chimney

My home (in East Texas, built in 1885, two stories, pier and beam) has two chimneys, one of which I would like to reopen. Apart from information gleaned online, I have no experience with chimneys or ...
1
vote
3answers
168 views

Removing lower section of an old chimney?

I know that removing an old unused chimney from a house is done from the top down. I'm just wondering if it's even thinkable to remove a mid-section from the chimney, while reinforcing under the ...
1
vote
2answers
136 views

How can I force hot air through this fireplace grate?

Ok, here's the front of my fireplace (note the grates on the top and bottom): Here's the model tag: This fireplace came with the house and I know almost nothing about it except that the chimney was ...
1
vote
2answers
79 views

Chimney crown repair - cover holes in bricks?

Getting ready to repair the chimney crown, using this Family Handyman article as a guide. On our chimney, there is a line of bricks around the crown that have exposed holes in them. The holes are ...
1
vote
2answers
89 views

Can I use single walled stove pipe for my wood stove?

I have a wood stove that I'm going to use in my work room that is on the first floor of my house. I was planning on running it out the side of my house and then the chimney go up next to my house. I ...
1
vote
3answers
160 views

How much mortar between bricks?

Our Chimney was in bad repair, and we had two chimney companies come and and say basically the same thing, it needed to be partially torn down, re-bricked, new crown, new damper door. Ok, so the ...
1
vote
1answer
133 views

Unused Chimney Flues

I have a chimney with three flues (exterior chimney on a one story house). One is for a wood burning fireplace we do use. The other two were for the furnace and water heater but are both no longer ...
1
vote
1answer
291 views

How to remove an old wood stove brick chimney?

I need to remove what is left of an old wood stove chimney that was partially removed from the top at roof level (one story) and the opening roofed over. What is the best way to break out the bricks?
1
vote
1answer
58 views

Will using a Chimney Balloon to insulate my fireplace block the ventilation of my water heater and furnace?

My house was built in 1920 in Providence, RI. I'm not sure of the design of the entire chimney, but the water heater and furnace vent into the chimney. I am considering using a Chimney Balloon, but ...
1
vote
2answers
800 views

Bringing unused chimney down below roof line?

I'm in the middle of renovating a balloon-framed house from the 1890's. The house is currently gutted. It originally had a standing-seam metal roof that was penetrated by a central chimney. At some ...