How To Clean Indoor Stone Fireplace

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Stone fireplaces should be cleaned when buildup starts to occur. This type of fireplace can be difficult to clean because of the porousness and irregular shape of the rocks. With a little time and effort, however, you can do a routine cleaning without the help of a professional. You should first prepare the fireplace, do an initial cleaning, and then do a deep cleaning if necessary.

1

Clean the fireplace regularly. The outside of the fireplace should be cleaned at least once a month. The inside of the fireplace should be cleaned anytime ¼ or more of soot buildup occurs. For some, this could mean cleaning once a year. The fireplace may need to be cleaned a few times a year if it is used often.^[1]
2

Cover the hearth in a tarp. Make sure to surround the area around the fireplace with a tarp. You should do this to protect the hearth and floor from the chemicals used in cleaning. You can buy a tarp, or use cheap shower curtains from the dollar store. Seal the tarp down with duct tape.
3

Lay towels around the area. Lay towels or blankets in the area around the tarp. This will catch any dripping or running from the cleaning solution. Only use only towels or blankets that you wouldn't mind getting stained.^[2]
4

Do an initial cleaning. Use a broom and dustpan to sweep up what ash and dust you can. Sweep around the hearth and use a smaller brush to dust the fireplace. Then, spray the fireplace with water. This makes it more susceptible to cleaning solutions.^[3]
5

Put on protection. Always wear eye protection and rubber gloves when using chemicals. You can choose not to if using a milder solution, but you definitely should when using bleach, strong cleaners, or trisodium phosphate. You should also open a window to bring fresh air in while you're cleaning.^[4]

1

Use an all purpose cleaner. Wash the fireplace down with an all purpose cleaner. Some all purpose cleaners are Mr. Clean Multi-Surface Cleaner and Goo Gone All Purpose Cleaner. Spray on the cleaner and use a sponge to scrub off the buildup.^[5]
2

Switch to mild soap. After doing an initial scrubbing, switch to a mild soap. Mix the mild soap with water. Continue to scrub at the stone.^[6]
3

Use more all purpose cleaner. Switch back to the all purpose cleaner after you've scrubbed for with the mild soap. Scrub for a while and then switch back to the mild soap if necessary. Continue switching back and forth until you are satisfied with the outcome. Allow a few minutes for the stone to dry.^[7]

1

Mix the trisodium phosphate with water. Use ½ or 1 cup of the trisodium phosphate (TSP). Put the TSP into a gallon of warm water. This is a very strong chemical so be sure that you have all of your protection on when handing the TSP.^[8]

EXPERT TIP

Raymond Chiu is the Director of Operations for MaidSailors.com, a residential and commercial cleaning service based in New York City that provides home and office cleaning services at affordable prices. He has a Bachelors in Business Administration and Management from Baruch College.

Raymond Chiu
House Cleaning Professional

Our Expert Agrees: Mix TSP with one gallon of water in a bucket. You can purchase TSP at home improvement stores. Use a scrub brush to scrub the stone gently and then wipe the cleaned areas with a damp rage to remove any excess TSP. Always make sure you're wearing gloves, goggles, and a face mask and that the area is well ventilated.
2

Use a scrub brush. Dip a scrub brush into the mixture. Begin to scrub the fireplace. You may have to do some tough scrubbing to remove all the buildup. Make sure to get into the hard-to-reach places and nooks and crannies.^[9]
3

Make a paste for tough areas. If the tough spots aren't coming off, then you can make a paste out of a small amount of water and TSP. Apply the paste directly to the spot. Scrub until the spot begins to lift.^[10]
4

Rinse with water. Dip a clean sponge into water. Rinse every part of the fireplace that you used the TSP on. Allow time to dry.^[11]

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If buildup occurs in between cleanings, you can use mild soap, water, and a sponge to wash off the spots.
Consider calling in professionals once a year to thoroughly clean soot and ash.^[12]
Do a test clean with any cleaning solution you aren't familiar with. Try it on an inconspicuous part of the fireplace and then wait 24 hours.^[13]

Only clean when the fireplace is cold. Do not attempt to clean when it is heated or in use.^[14]
Use bleach sparingly because it could fade the stone.^[15]

Things You'll Need

Bucket
Tarp
Towels
Trisodium phosphate
Water
All purpose cleaner
Mild soap
Scrub brush
Sponge

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Article SummaryX

To clean a stone fireplace, start by using a broom and dustpan to sweep up any ash and dust. Next, spray the fireplace with water and wash it with an all purpose cleaner and sponge. After an initial cleaning, mix mild soap and water, dip a sponge into the solution, and continue cleaning the stone. For a deeper clean, mix trisodium phosphate with water, dip a scrub brush into the mixture, and work at removing built-up grime. You can also make a paste by mixing a small amount of water with your trisodium phosphate, applying it directly to the stubborn spots, and scrubbing the area. To learn how to rinse your fireplace after you've cleaned it, keep reading!

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