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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1answer
13 views

Code requirement for depth of Counter Flashing and material sealant?

Okay, I've got a recently-installed standing-seam metal roof. The roofers ground out the brick in my chimney to install counter-flashing. Recently there was a big leak around the area of the chimney. ...
3
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3answers
95 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? ...
0
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1answer
18 views

Furnace and Water Heater Ventilation pipe

I have a home that was built in 1924, the pipe that vents my furnace and water heater is green and it is located in my chimney. The top of the chimney is open in my attic, you can see the green ...
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1answer
27 views

Is my chimney safe if it has ash on the walls of it?

I've read a bit about tarry, shiny creosote, and I don't have that. What I have is a thin coating of soot and some flaky pieces here and there. Is this something I should worry about, or just start ...
1
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1answer
46 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 ...
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2answers
43 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 ...
1
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1answer
32 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
2answers
60 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 ...
1
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1answer
49 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 ...
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2answers
110 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 ...
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1answer
223 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 ...
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0answers
55 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
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2answers
56 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 ...
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2answers
79 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 ...
0
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1answer
43 views

Can fiberglass insulation cause leaks?

I've recently bought a 100 year old wood frame house from a DiY guy who took decent care of the place. He didn't put any insulation in the attic though and my home inspector said insulation is a great ...
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0answers
73 views

How to strengthen a giant pole made out of seven 2m long 40mm diameter plumbing waste pipes?

The problem: I have a plant growing out of my chimney. Last year I had a chimney sweep go up on the roof and remove the plant and fit a cowl/ cap onto the chimney costing over £500 including cost of ...
1
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1answer
59 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 ...
6
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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 ...
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1answer
362 views

What type of caulk can I use between the furnace vent pipe & flashing on a roof?

Looking to seal a gap between my furnace's vent pipe & the flashing on the roof, specifically here: I'll have to check if there's a missing storm collar too, but should I use High-temp ...
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3answers
106 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
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2answers
328 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 ...
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2answers
223 views

Attaching a heavy item to a 'powdery' external wall

I have a house in the UK built circa 1870. The external walls are London brick in Flemish bond I think, and are in a single layer (no cavity wall construction). At some point many tens of years ago, a ...
1
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1answer
248 views

Can we mount a TV over a fireplace with the chimney directly behind it?

We have a home built in the 1950's and I'm assuming the chimney/fireplace is original. We'd like to mount our 50" TV over the fireplace. Directly over the mantle is a wall, but we believe that ...
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0answers
58 views

Is it safe to seal the exterior of a stone chimney?

We have a 1938 stone chimney (not brick) that is severely deteriorated. We are going to repair the mortar immediately and put a cap on top, but we're unsure about weatherproofing the stone. We do want ...
0
votes
1answer
72 views

Remove interior concrete chimney

I have an old chimney from a long-gone oil furnace. It does not go through the roof, just cut flat at the floor of the attic. I was hoping I could remove it brick by brick, starting from the top ...
3
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2answers
278 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 ...
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1answer
41 views

Stainless or aluminum chimney liner

We replaced our oil burner with natural gas (not the high efficiency type) and it appears the cooler exhaust is causing heavy condensation near the roof. Chimney company wants to install a stainless ...
1
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1answer
93 views

what options do i have dealing with a chimney downdraft

I have a prefabed fireplace that can be either gas (current setup) or wood. I'd like to convert it to wood (gas assist), but am being told that I've got a severe downdraft, and would either need a ...
1
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1answer
107 views

Chimney on 100 year old home has pulled away from outside wall

I am restoring a 100 year old one story wood frame home with a metal roof. The original foundation sits on cut logs. The chimney has pulled away from the roof line which leaves an exposed area where ...
2
votes
1answer
75 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 ...
1
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1answer
106 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
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2answers
3k 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 ...
6
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3answers
1k 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 ...
1
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2answers
499 views

Should I install the exhaust hood outlet through the chimney or house wall?

What are the advantages and disadvantages of implementing an outlet of a kitchen exhaust hood through a chimney or directly through the outer wall of the house? There are unused chimneys in the house ...
1
vote
1answer
319 views

Mounting a TV on a chimney breast

In our new house the master bedroom is on the upper level and has a chimney running through the room from the living room below. It's painted brick and all 4 sides are exposed (you can walk around ...
0
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2answers
276 views

Gap between 6“ dia wall thimble & 6” hvac pipe

I bought a 6" dia aluminum wall thimble to vent my 6" dia hvac steel exhaust pipe through to the outside. However, the diameter of the 6" thimble is actually 6 3/4". How do I effectively insulate the ...
4
votes
3answers
2k 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 ...
0
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3answers
3k views

How far does a ground rod need to be from the foundation?

I need to ground an antenna strapped to my chimney, which requires hammering in a new ground rod. However, the entire side of my house is paved, meaning I can't dig it up to find the foundation ...
0
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2answers
543 views

What should I do with my leaking chimney?

We have a brick chimney on the side of our 110 year old, 2 story house. We aren't going to use the fireplace - we have a ventless insert we are going to use. The chimney leaks terribly. We are ...
3
votes
1answer
125 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
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2answers
113 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.
2
votes
1answer
338 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 ...
3
votes
1answer
278 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 ...
2
votes
2answers
173 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 ...
3
votes
1answer
848 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 ...
4
votes
1answer
267 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 ...
6
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4answers
3k 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 ...
4
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1answer
251 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 ...
2
votes
1answer
461 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
372 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 ...