Author: Zespół RC-Laser, specjaliści czyszczenia laserowego
Fire damage cleaning with a laser
Soot and the charred layer taken off the structure — dry, without water and without abrasive
After the fire brigade has been through, the building is already soaked, and soot is carcinogenic and must not be blown around inside. The laser takes it off dry, and extraction at the head collects the dust into a filter. Once it is clean you can see the real state of the roof timbers and the masonry — and only then can anyone sensibly judge what needs replacing.
* A quote from a photo is preliminary and indicative. The firm price follows an inspection on site — only then are the layer thickness and the condition of the substrate visible.
Why not every method works after a fire
The brigade leaves the structure saturated with water, so pressure washing and wet methods add to the problem instead of solving it — moisture in timber and masonry is the straight road to mould. Sandblasting and soda, in turn, blow soot through the whole building, and fire soot contains polycyclic aromatic hydrocarbons that nobody wants in ventilation ducts and floor cavities. Both also remove material, which on a charred beam means losing a cross-section that is already short.
How the laser works on soot
Soot is black, so it absorbs almost the entire beam and lifts off the substrate, which takes the energy quite differently. The process is dry and non-contact, and extraction mounted at the head collects the released dust into a filter instead of spreading it through the rooms. Parameters are set separately for timber, brick, render and steel — charring can be taken off layer by layer and stopped exactly where sound material begins.
Cleaning process step by step
Inspection and test patch
After the photos we arrange a visit and clean a test patch. With fire damage this is not a formality — only the patch shows how much layer has to come off and how long it will take.
Cleaning with extraction
We work room by room, with extraction at the head and dust filtration. The collected material goes to disposal in line with regulations.
The structure laid bare
We hand the surface back clean and dry, ready for preservative or coating. You can then see exactly which members are worth keeping and which need replacing.
What we work on
We work on structural timber and roof frames, brick, stone, mineral renders, concrete, and on steel and installation components. We remove soot, smoke deposits, scorching and the charred layer, along with remnants of old coatings the fire had begun to burn.
What this method will not do
Material that has lost its strength is not something the laser repairs — cleaning shows the condition, it does not change it. We also do not clean plasterboard, textiles or wallpaper, because smoke goes right through them. Soot driven deep into absorbent render or fresh concrete can leave a shadow, and we say so before starting.
Laser versus other methods
Against sand and soda blasting: no abrasive that would have to be picked out of ceilings, ducts and joints after a fire, and no material loss on a beam whose cross-section is already weakened. Against pressure washing: no extra water into a structure soaked during firefighting. Against chemicals: nothing soaks into the masonry to return later as efflorescence.
Time and how it runs
With fire damage the order matters: dry the building first, then clean, then assess the structure and protect the surfaces. We come in once the building is dried and made safe — cleaning a wet, unstable structure is money wasted, because you will have to come back anyway.
Loft after an electrical fire
Roof timbers and brick chimneys covered in soot, beams charred a few millimetres deep in places. The owner had a quote for sandblasting, but the contractor would not bring abrasive into an interior with the ceiling still intact.
Frequently asked questions
Will the laser remove the smell of burning?
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It removes its main source on the structure, the soot layer, and that usually makes the biggest difference. It does not replace ozone treatment of the rooms or the replacement of materials that have soaked up smoke — mineral wool, upholstery, plasterboard. We say plainly when cleaning alone will not be enough.
Do you clean plasterboard and textiles?
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No. Plasterboard and textiles absorb smoke throughout their volume, so there is no layer to remove — there the only answer is replacement. The laser makes sense on timber, brick, render, concrete, stone and steel.
Can charred roof timbers be saved?
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That depends on how much cross-section is left, and the laser does not restore lost timber. It removes the charred layer and exposes sound material, so the engineer assesses the real cross-section instead of estimating through a black crust. Often it turns out fewer members need replacing than assumed.
How long does it take and what drives the price?
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On a typical soot layer on masonry it is in the order of a few square metres per hour, but thick charring and intricate detail can slow that many times over. That is why we do not quote fire damage from photographs alone — after a first assessment we arrange an inspection and a test patch.
Free consultation
Describe your project and we'll arrange a free consultation.
* A quote from a photo is preliminary and indicative. The firm price follows an inspection on site — only then are the layer thickness and the condition of the substrate visible.