Black mould removal
Affected walls, ceilings, sealant and window reveals are treated with a fungicidal wash that kills the growth, not just a bleach that lightens the stain.
Home / Services / Damp Proofing & Ventilation / Mould Removal & Damp Treatment
Mould Removal and Damp Treatment That Fixes the Cause
Mould removal and damp treatment aimed at the reason the mould is there, so you are not cleaning or repainting the same black patches every winter.
Damp & Ventilation
Mould Removal & Damp Treatment with EcoBuild Contractors
Black spots spreading across a bedroom ceiling, windows streaming every morning and a musty smell inside wardrobes all point to a home holding more moisture than it can get rid of. Our mould removal and damp treatment service starts by finding out why. We aim to identify and address the underlying cause of the mould rather than simply clean it off or paint over it, because a stain that is only covered up nearly always comes back within a season.
In most homes the culprit is condensation: steam from cooking, showers, drying clothes and breathing settling on cold walls, windows and corners. Sometimes it is damp getting in from outside through failed pointing, a leaking gutter or a bridged damp proof course, and occasionally it is both. Each needs a different fix, so we investigate before recommending anything, using moisture and humidity readings rather than guesswork.
Once the cause is clear, we kill and remove the existing growth, then deal with what fed it. That can mean new bathroom and kitchen extraction, a Positive Input Ventilation unit where suitable, insulating a cold spot, repairs to the outside of the building, or anti-mould coatings on surfaces that will always see some moisture. Electrical work such as fan installation is carried out by competent, qualified electricians with certification provided where applicable.
What we do
Mould and damp work we carry out
Condensation and moisture problems
We record humidity and surface temperatures room by room to find where moist air is coming from and where it is settling.
Damp investigations and treatment
Moisture readings at different heights tell rising, penetrating and condensation damp apart, so the treatment matches the actual source.
Anti-mould treatments and specialist coatings
Clean, dry surfaces are sealed and finished with a mould-resistant paint system suited to bathrooms, kitchens and cold bedrooms.
Bathroom and kitchen ventilation
We check that steam from showers and hobs is actually leaving the house, including ducting that may be blocked, too long or venting into the loft.
Extractor fan installation
Weak or broken fans are replaced with properly sized units, including humidistat models that switch on by themselves when the air turns damp.
Positive Input Ventilation (PIV)
Where suitable, a PIV unit supplies gently filtered air into the home from the loft or through a wall, diluting moist air throughout the house.
Cold spot and thermal bridge checks
Mould that keeps returning to one corner often marks missing insulation at the eaves or a cold lintel, which we can insulate or upgrade.
Preventative measures
Trickle vents, undercut doors and practical advice on heating and drying laundry help keep the home dry long after the treatment is finished.
Why it is worth it
Benefits of mould removal & damp treatment
Mould that stays away
Fixing the moisture behind the growth means the treated walls stay clean instead of blackening again by the next cold spell.
Healthier rooms
Mould spores and damp air can aggravate asthma and allergies, so drier rooms are better places to sleep and spend time in.
Belongings protected
Clothes, shoes, curtains and furniture stop picking up the musty smell and spotting that come with constant condensation.
A clear written record
Our findings set out what caused the problem and what was done, which helps homeowners, tenants and landlords agree on the fix.
Why painting over mould does not work
Mould is a living growth, and the black colour is only the visible part. Its roots reach into plaster, grout and sealant, so a coat of ordinary emulsion hides it for a few weeks at most before spots push back through. Even a specialist anti-mould paint will struggle if the wall behind it stays cold and wet for most of the winter.
That is why every job starts with the question of where the water is coming from. If the answer is condensation, the fix is better extraction, steadier heating and warmer surfaces. If water is getting in from outside, the repair is to the building itself. Only once that is sorted do coatings and redecoration have a fair chance of lasting.
Mould in rented homes: what landlords should know
Damp and mould growth is one of the hazards assessed under the Housing Health and Safety Rating System, and councils can require landlords to deal with serious cases. In social housing in England, Awaab's Law now sets legal timescales for landlords to investigate and fix damp and mould hazards.
For any landlord or managing agent, the sensible approach is to act quickly, establish whether the cause is condensation, a building defect or both, and keep a written record of the work. We can carry out the investigation, the treatment and any ventilation upgrades in as few visits as possible.
Our process
How the job runs
- Investigate the causeWe take humidity, surface temperature and moisture readings, look at how each room is ventilated and check the outside of the building for leaks.
- Explain and quoteYou receive a plain explanation of what is causing the mould, with the clean-up, any repairs and the ventilation upgrades priced separately.
- Remove and treatThe growth is killed with a fungicidal treatment, damaged sealant is replaced, and surfaces are finished with an anti-mould coating where it helps.
- Fix the sourceFans, PIV, trickle vents, insulation or outside repairs are completed, and we show you how to use any new ventilation day to day.
FAQ
Mould Removal & Damp Treatment questions
Is black mould dangerous?
Mould can trigger allergic reactions, asthma attacks and other breathing problems. Babies, older people and anyone with a weakened immune system are most at risk, so it should be dealt with promptly rather than left to spread.
Does bleach kill black mould?
Bleach can remove the colour from surface mould but often leaves growth behind in porous plaster and silicone, so it reappears. A purpose-made fungicidal wash works better, followed by fixing the source of the moisture.
Can drying clothes indoors cause mould?
Yes. A full load drying on radiators releases a lot of water into the room. If you have to dry clothes indoors, use a room with an extractor fan running or a vented tumble dryer, and keep the door closed.
I rent my home. Who should fix the mould?
Tenants should report damp and mould to their landlord in writing, as landlords are responsible for repairs to the structure and for fixing the cause. We work for landlords and letting agents and can investigate once they arrange access.
Can I see examples of mould jobs you have done?
Yes, ask us for photos of similar jobs when you get in touch and we will share examples that match the kind of problem you have.
Free, no-obligation quote
Get a free quote for mould removal & damp treatment
Tell us a little about your property and the work you need. Add a few photos if you can, it helps us give you an accurate price sooner.
Related services
Often booked with mould removal & damp treatment
Damp Proofing & Treatment
Damp surveys that find the real cause, then the right fix: damp proof course injection, penetrating damp repairs, replastering and cellar tanking for homes and businesses.
Learn more
Home Ventilation & PIV
Humidistat, continuous running and kitchen extractor fans plus loft-mounted Positive Input Ventilation, sized to Approved Document F to clear steam and stop condensation.
Learn more
Painting & Decorating
Interior and exterior painting, wall and ceiling preparation, minor plaster repairs and anti-mould coatings, from a single room to a full property redecoration.
Learn more