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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2answers
303 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 ...
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1answer
300 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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1answer
44 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 ...
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1answer
110 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 ...
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1answer
2k views

How do I prevent water from leaking down my chimney?

When it rains hard, I get a decent amount of water coming in through my chimney. Is this normal? What can I do to minimize this? It's a relatively new house; it has a guard on top, and the chimney ...
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1answer
720 views

What type of mortar would I use to seal cracks in our chimney?

We've got a brick chimney that's ~25 years old and it's got a quite a few cracks in the mortar (some hairline, some as thick is a quarter). What's the best way to seal all those cracks? I assume ...
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1answer
558 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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2answers
572 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 ...
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1answer
361 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 ...
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1answer
528 views

How can I alter a chimney to make the smoke rise higher?

We have a neighbor who loves their fireplace. Every day the temperature drops below 60 or so, there's a fire. I love fires, but we smell every one, and don't benefit from the heat :-). The chimney ...
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1answer
365 views

Can I attach drop ceiling molding to a brick chimney?

I have a drop ceiling in most areas of my basement. The previous owners did not complete the job over top of where the wood stove is, and around the brick chimney behind the stove. I don't think this ...
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1answer
389 views

What should I pack behind a cast iron fireplace?

I have a cast iron open fireplace which is (loosely) attached to the chimney breast in my living room by the mantle piece. There is a small but significant gap behind it where the bricks have been ...
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0answers
31 views

Removing a Rayburn Solid Fuel Cooker - Issues to consider

I have a solid fuel Rayburn Regent cooker (essentially an Aga) with built in boiler in my kitchen, which I want to remove. It is no longer connected to the heating system, but appears to be connected ...
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0answers
62 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 ...
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1answer
101 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 ...
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1answer
44 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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1answer
24 views

Should I plug unused chimney ports in basement?

My house used to use the basement for gas heat and the water heater that were using these, 3.5" and 5" ports in the chimney stack. The whole chimney is no longer used but I want to keep the option ...
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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 ...
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1answer
29 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. ...
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1answer
79 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 ...
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3answers
5k 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 ...
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2answers
595 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 ...
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0answers
12 views

Chimney removal/patch at basement floor

I recently demolished a chimney, for time and lack of energy I stopped just above basement floor level. I also was a bit surprised that the bottom of the bricks goes below the top of the basement ...
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0answers
76 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 ...
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2answers
302 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 ...
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1answer
2k views

Why is getting a chimney sleeved such a hassle … and expensive [duplicate]

Possible Duplicate: Installing a Chimney Liner a DIY project? This seems to be an ongoing theme, and quite annoying I might add. When I first went looking for this to be done, I found some ...