The short answer
Prepare the Room and Yourself
Before touching any wall, open windows and doors to let fresh air move through. Turn off the HVAC system so soot does not spread through the house. Wear rubber gloves, a NIOSH-approved respirator mask, and safety goggles to keep soot away from your skin, eyes, and lungs.
Cover the floor with plastic sheeting or old drop cloths to catch falling residue. Remove any loose items from the room, including curtains and small furniture. If you feel unwell from the smoke smell or particles, step outside for fresh air and see a doctor if symptoms continue.
- Open windows and doors for ventilation
- Turn off the HVAC system
- Wear gloves, a mask, and goggles
- Cover floors with plastic sheeting
- Remove loose items from the room
Dry Clean First with a Sponge
Use a dry chemical sponge, also called a soot sponge, to lift loose soot from the wall. These sponges work like an eraser and do not need water. Start at the top of the wall and work downward in overlapping strokes, turning the sponge as it gets dirty.
Do not rub hard, as that can grind soot into the paint. Change to a fresh sponge when the surface is covered with residue. Dry cleaning removes the bulk of the soot and prevents smearing, which is why it comes before any wet cleaning step.
Wet Clean with the Right Solution
After dry sponging, mix a small amount of mild dish soap or a specialized fire residue cleaner with warm water. Dip a clean cloth into the solution, wring it out until barely damp, and wipe the wall from top to bottom. Rinse the cloth often and change the water when it turns gray.
Avoid soaking the wall, since too much moisture can damage drywall or cause paint to bubble. Work in small sections and check your progress. For stubborn spots, a solution of trisodium phosphate (TSP) and water can help, but test it on an inconspicuous area first.
Rinse and Dry the Surface
Once the walls are clean, rinse them with a clean cloth dipped in plain water. This removes any soapy residue that could attract dirt later. Wipe the walls gently and then let them air dry completely.
Use fans or a dehumidifier to speed up drying, especially in a semi-arid climate with cold winters and hot dry summers. If you live in Caldwell, keep the room well ventilated while drying. Check the walls for any remaining stains or sticky spots after they are dry.
When to Call the Pros
Some fire residue is oily, sticky, or deeply embedded in the wall, especially after a large fire. If dry and wet cleaning do not remove the residue, or if the walls are charred, warped, or have a strong odor that lingers, professional help is needed.
Local water damage pros have industrial equipment and specialized cleaning agents for fire residue. They can also clean your ductwork and upholstery if smoke particles have spread. For thorough cleaning after a fire, consider services like deep cleaning after disasters. Policies vary, and your insurer decides what is covered.
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Call Now (208) 729-2441Frequently asked questions
Can I use bleach to clean fire residue from walls?
Bleach is not recommended for fire residue because it can damage paint and does not break down oily soot. It also creates harmful fumes. Stick to dry sponging and mild soap solutions, or use a cleaner made for fire residue.
Will the smoke smell go away after cleaning the walls?
Cleaning the walls removes a lot of the odor, but the smell can linger in fabrics, carpets, and ductwork. You may need to wash curtains, shampoo carpets, and clean air ducts. If the odor persists, professional cleaning may be necessary.
What if the walls are painted with flat paint?
Flat paint is porous and absorbs soot, making it harder to clean. Dry sponging is the right approach, but wet cleaning can leave streaks. You might need to repaint the walls after cleaning. Test a small area first to see how the paint reacts.