Candle or Wood Fire Soot Stains
How to Recognize & Diagnose Indoor Stains from Candles, Woodstoves, Fireplaces. Safety warning about soot deposits indoors
STAINS CANDLES FIREPLACE WOODSTOVE - CONTENTS: How to Recognize & Diagnose Indoor Stains from Candles, Woodstoves, Fireplaces & other sources of soot like stains indoors. A photo-guide to common indoor ceiling and wall stains and what they mean. Links to more photos of indoor ceiling or wall stains caused by indoor candles, fireplaces, or wood stoves - stains that are not toxic mold
POST a QUESTION or READ FAQs about how to diagnose and prevent indoor wall, ceiling or floor stains due to burning candles, woodstoves, or fireplaces
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Interior wall or ceiling stains traced to candles, fireplaces, woodstoves:
This article describes & diagnoses indoor stains traced to burning candles, scented candles, fireplaces, woodstoves, kerosene lamps: common causes of dark interior wall and ceiling or floor carpet stains. We explain how to recognize these stains and the role in their creation of thermal tracking, thermal bridging,
building air leaks, and building insulation defects. Often these fire or candle stains are mistaken for toxic indoor mold.
these causes of dark indoor stains to learn recognize non-fungal materials or even possibly harmless cosmetic
"black mold" often mistaken for "toxic fungal growth." Our page top photo shows a client thinking about her collection of scented candles - a source of indoor stains and odors that can be a problem for asthmatics others.
In buildings where occupants are or have been smokers, or where occupants burn candles,
especially scented candles, thermal tracking will often be still more distinctly visible as soot stains in the thermal tracking patterns
we've already discussed.
Since scented candles can be a source of indoor air quality problems including toxic lead deposition and perfumes
which are respiratory irritants to some people, thermal tracking on buildings combined with this evidence can also be a clue useful in
diagnosing indoor air quality complaints.
In these photographs, all of the stains visible appear due to use of candles. Note the absence
of framing-interval staining (16" or 24" on center) which would have been characteristic of thermal tracking, even of the candle soot,
had the building surfaces been cool due to poor insulation.
Indoor Stains from Cigarette Smoking
Stains from years of cigarette or cigar smoking appear as a yellow-brown haze on building walls, deposited much like the black and gray stains deposited from candles, fireplaces and woodstoves. Smoking stains indoors tend to leave a bit of a sticky residue on glossy-painted surfaces. In addition, attempts to wash down stained walls or other events causing condensation on wall surfaces often leave white streaks down walls where rivulets of water descended, washing away some of the nicotine and smoke deposits.
Identify Candles, Fireplaces, Woodstoves as the Source of Indoor Stains by Pattern & Location & Use History
You can spot indoor stains to candles most easily by noticing the location of stains in relation to candles - see our photo at above right.
Similarly, fireplace smoke or soot stains indoors tend to be deposited on walls and ceilings or even the mantle and hearth face right above the fireplace (photo above-left).
Watch out: But what about the black stain on the wood floor in our photo at above-right? It's pretty obvious that the too-narrow hearth width combined with the burned flooring are strong evidence that building a fireplace without an adequate hearth can set the house on fire.
So start where the stain is most dark and look for the nearby source.
Dangerous Soot Stains Traced to Heating Equipment
Watch out: Safety warning about soot: Sooting can occur with both gas fired and oil fired systems.
Reader Question: What is causing black soot in my condo, who is responsible if it's the heating system, and is it dangerous?
I read an article concerning thermal tracking, ghosting, soot online. I have a major problem with that in my condo and i have a few questions that i need help with. would you mind my asking them to you, if you would answer them it would help me out quite a bit.
I live in a garden style condo that is a mess with all the soot all over my walls, windows, etc. what can i do? I asked the plumber what can i do and he said it was my responsibility, but if this has issues concerning the heating system who would be responsible for this? there is one main boiler for the whole bldg. is this a health issue? Who can I contact about this in the mass area? Or can you help me? I am worried concerning my health more than anything else. Please any information that you can send to me would be a big help right now. - D.B.
Reply: identify the source of soot, and resolve unsafe heating system problems before beginning cleanup
A competent onsite inspection by an expert usually finds additional clues that help accurately diagnose a problem.
That said, here are some things to consider:
First establish that the soot you see is due to the heating system; if the same system is serving multiple condo units in the building, as your note indicates, then in most cases one would expect other residents to have the same problem.
Second, severe sooting traced to the boiler indicates both improper operation and possibly very unsafe conditions at the boiler, especially if it's a gas unit (carbon monoxide hazards); Be sure you have working smoke detectors and CO detectors in your home.
Now if sooting is traced to the heater, then you may have a claim for cleaning and restoration work to remove the soot from your own home, as one would expect it is due to improper system maintenance, or repair. That's something to discuss with your condo owners association and management association, not the local plumber or heating contractor. But this concern, while understandably troubling to you, should be addressed after any questions about current operating safety of the system have been addressed.
Soot can indeed be a respiratory or eye irritant if at high levels.
If you have extensive soot damage that will require professional cleaning, and perhaps re-painting, you should also contact your homeowner's insurance company. Soot cleanup may involve washing and re-painting walls and ceilings, professional carpet cleaning, and cleaning, laundering, or dry cleaning of curtains etc. But I wouldn't begin cleanup before the cause of the sooting is identified and cured.
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Questions & answers or comments about how to diagnose and prevent indoor wall, ceiling or floor stains due to burning candles, woodstoves, or fireplaces.
Use the "Click to Show or Hide FAQs" link just above to see recently-posted questions, comments, replies, try the search box just below, or if you prefer, post a question or comment in the Comments box below and we will respond promptly.
ASHRAE resource on dew point and wall condensation - see the ASHRAE Fundamentals Handbook, available in many libraries. The following three ASHRAE Handbooks are also available at the InspectAPedia bookstore in the third page of our Insulate-Ventilate section:
2005 ASHRAE Handbook : Fundamentals: Inch-Pound Edition (2005 ASHRAE HANDBOOK : Fundamentals : I-P Edition) (Hardcover), Thomas H. Kuehn (Contributor), R. J. Couvillion (Contributor), John W. Coleman (Contributor), Narasipur Suryanarayana (Contributor), Zahid Ayub (Contributor), Robert Parsons (Author), ISBN-10: 1931862702 or ISBN-13: 978-1931862707
2004 ASHRAE Handbook : Heating, Ventilating, and Air-Conditioning: Systems and Equipment : Inch-Pound Edition (2004 ASHRAE Handbook : HVAC Systems and Equipment : I-P Edition) (Hardcover)
by American Society of Heating, ISBN-10: 1931862478 or ISBN-13: 978-1931862479
"2004 ASHRAE Handbook - HVAC Systems and Equipment The 2004 ASHRAE HandbookHVAC Systems and Equipment discusses various common systems and the equipment (components or assemblies) that comprise them, and describes features and differences. This information helps system designers and operators in selecting and using equipment. Major sections include Air-Conditioning and Heating Systems (chapters on system analysis and selection, air distribution, in-room terminal systems, centralized and decentralized systems, heat pumps, panel heating and cooling, cogeneration and engine-driven systems, heat recovery, steam and hydronic systems, district systems, small forced-air systems, infrared radiant heating, and water heating); Air-Handling Equipment (chapters on duct construction, air distribution, fans, coils, evaporative air-coolers, humidifiers, mechanical and desiccant dehumidification, air cleaners, industrial gas cleaning and air pollution control); Heating Equipment (chapters on automatic fuel-burning equipment, boilers, furnaces, in-space heaters, chimneys and flue vent systems, unit heaters, makeup air units, radiators, and solar equipment); General Components (chapters on compressors, condensers, cooling towers, liquid coolers, liquid-chilling systems, centrifugal pumps, motors and drives, pipes and fittings, valves, heat exchangers, and energy recovery equipment); and Unitary Equipment (chapters on air conditioners and heat pumps, room air conditioners and packaged terminal equipment, and a new chapter on mechanical dehumidifiers and heat pipes)."
1996 Ashrae Handbook Heating, Ventilating, and Air-Conditioning Systems and Equipment: Inch-Pound Edition (Hardcover), ISBN-10: 1883413346 or ISBN-13: 978-1883413347 ,
"The 1996 HVAC Systems and Equipment Handbook is the result of ASHRAE's continuing effort to update, expand and reorganize the Handbook Series. Over a third of the book has been revised and augmented with new chapters on hydronic heating and cooling systems design; fans; unit ventilator; unit heaters; and makeup air units. Extensive changes have been added to chapters on panel heating and cooling; cogeneration systems and engine and turbine drives; applied heat pump and heat recovery systems; humidifiers; desiccant dehumidification and pressure drying equipment, air-heating coils; chimney, gas vent, fireplace systems; cooling towers; centrifugal pumps; and air-to-air energy recovery. Separate I-P and SI editions."
Energy Savers: Whole House Systems Approach to Energy Efficient Home Design [copy on file as /interiors/Whole_House_Energy_Efficiency_DOE.pdf ] - U.S. Department of Energy
"Energy Savers: Whole-House Supply Ventilation Systems [copy on file as /interiors/Energy_Savers_Whole-House_Supply_Vent.pdf ] - ", U.S. Department of Energy energysavers.gov/your_home/insulation_airsealing/index.cfm/mytopic=11880?print
"Energy Savers: Whole-House Exhaust Ventilation Systems [copy on file as /interiors/Energy_Savers_Whole-House_Exhaust.pdf ] - ", U.S. Department of Energy energysavers.gov/your_home/insulation_airsealing/index.cfm/mytopic=11870
"Energy Savers: Ventilation [copy on file as /interiors/Energy_Savers_Ventilation.pdf ] - ", U.S. Department of Energy
"Energy Savers: Natural Ventilation [copy on file as /interiors/Energy_Savers_Natural_Ventilation.pdf ] - ", U.S. Department of Energy
"Energy Savers: Energy Recovery Ventilation Systems [copy on file as /interiors/Energy_Savers_Energy_Recovery_Venting.pdf ] - ", U.S. Department of Energy energysavers.gov/your_home/insulation_airsealing/index.cfm/mytopic=11900
"Energy Savers: Detecting Air Leaks [copy on file as /interiors/Energy_Savers_Detect_Air_Leaks.pdf ] - ", U.S. Department of Energy
"Energy Savers: Air Sealing [copy on file as /interiors/Energy_Savers_Air_Sealing_1.pdf ] - ", U.S. Department of Energy
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