Expert Black Mould Removal & Prevention
Mould & Condensation Treatment
What is Condensation and Mould?
Condensation dampness occurs when moisture in the air settles on cold surfaces, typically observed on windows in the morning or after being away from home. Modern homes with double-glazed windows, loft insulation, and cavity wall insulation are energy-efficient but can trap moisture inside, preventing it from escaping. This trapped moisture accumulates on cold areas, creating the perfect environment for black mould growth. Untreated condensation and mould create infected areas in your home with potential damage to brickwork, potent and stale odours, and serious health risks for anyone living on the property.
Signs & Symptoms
- Heavy condensation on the internal side of windows, especially in mornings
- Black mould growth on walls, ceilings, or around window frames
- Damp stains or watermarks on interior walls, particularly near the base
- Peeling paint or wallpaper due to moisture pushing through walls
- Musty, stale odours throughout the property
- Decaying or rotting skirting boards and floorboards
- Mould growth in wardrobes and behind furniture against external walls
Common Causes
- Poor ventilation in kitchens, bathrooms, and other moisture-producing areas
- Modern insulation preventing moisture from escaping the property
- Inadequate heating creating cold surfaces for moisture to settle on
- Everyday activities: cooking, showering, drying clothes indoors
- Blocked or insufficient air vents and extractor fans
- Cold spots in corners and on external walls
- Furniture placed against external walls restricting air circulation
Our Mould & Condensation Treatment
At MJ Harwood, we provide bespoke condensation and mould treatment solutions tailored to your property's specific needs. Our fully trained technicians use environmentally friendly processes to eliminate mould and prevent its return.
Our Process
Comprehensive property survey to identify the root cause of condensation
Professional black mould removal using specialist anti-fungal treatments
Assessment of ventilation requirements throughout the property
Installation of extractor fans, air vents, or positive input ventilation systems
Treatment of affected walls with anti-condensation and anti-mould coatings
Window vent installation where required for improved air circulation
Expert advice on heating, ventilation, and lifestyle changes to prevent recurrence
Why Choose MJ Harwood?
- Bespoke treatment plans tailored to your property's specific needs
- Environmentally friendly processes safe for your family and pets
- Complete mould removal and prevention, not just surface cleaning
- Professional ventilation solutions including extractor fans and window vents
- Clean, respectful service with minimal disruption to your home
- Age UK registered and Care & Repair Leeds approved contractor
Trusted by homeowners across Yorkshire
Francheskah
“Quick response to potential damp found. Luckily no damp but advised on damp proofing home which we went ahead with and installed vents to existing windows. Reliable and prompt and honest fast worker. Definitely would recommend.”
MyBuilder User
Harrogate
“Damp proof completed and plastered as promised. Very pleased.”
Adam
Leeds
“Lee was fantastic as per expectations and reviews. Immediately was responsive and got the job done in no time. Now let's hope I don't have any more damp 🤞🏻”
Linda
Leeds
“Following an initial home visit I received a comprehensive estimate. A date was agreed, the team arrived and the job was done, with minimal disruption to me. All that gives me confidence that I can trust this company and would recommend them.”
MyBuilder User
Batley
“Very professional work. Waiting to see if damp course will work. Would recommend to others.”
Muhammed
Heckmondwike
“I had air vents installed in my windows and a special wall treatment to address mold issues, and I'm extremely pleased with the results. The team was professional, explained everything clearly, and worked efficiently. Highly recommend!”
Andy
Leeds
“A great job and went the extra mile. Lee sorted out a problem at my house while I was abroad and decorated after. He even colour matched the paint correctly. Really happy with his service. I would definitely recommend.”
Francheskah
“Quick response to potential damp found. Luckily no damp but advised on damp proofing home which we went ahead with and installed vents to existing windows. Reliable and prompt and honest fast worker. Definitely would recommend.”
MyBuilder User
Harrogate
“Damp proof completed and plastered as promised. Very pleased.”
Adam
Leeds
“Lee was fantastic as per expectations and reviews. Immediately was responsive and got the job done in no time. Now let's hope I don't have any more damp 🤞🏻”
Linda
Leeds
“Following an initial home visit I received a comprehensive estimate. A date was agreed, the team arrived and the job was done, with minimal disruption to me. All that gives me confidence that I can trust this company and would recommend them.”
MyBuilder User
Batley
“Very professional work. Waiting to see if damp course will work. Would recommend to others.”
Muhammed
Heckmondwike
“I had air vents installed in my windows and a special wall treatment to address mold issues, and I'm extremely pleased with the results. The team was professional, explained everything clearly, and worked efficiently. Highly recommend!”
Andy
Leeds
“A great job and went the extra mile. Lee sorted out a problem at my house while I was abroad and decorated after. He even colour matched the paint correctly. Really happy with his service. I would definitely recommend.”
Francheskah
“Quick response to potential damp found. Luckily no damp but advised on damp proofing home which we went ahead with and installed vents to existing windows. Reliable and prompt and honest fast worker. Definitely would recommend.”
MyBuilder User
Harrogate
“Damp proof completed and plastered as promised. Very pleased.”
Adam
Leeds
“Lee was fantastic as per expectations and reviews. Immediately was responsive and got the job done in no time. Now let's hope I don't have any more damp 🤞🏻”
Linda
Leeds
“Following an initial home visit I received a comprehensive estimate. A date was agreed, the team arrived and the job was done, with minimal disruption to me. All that gives me confidence that I can trust this company and would recommend them.”
MyBuilder User
Batley
“Very professional work. Waiting to see if damp course will work. Would recommend to others.”
Muhammed
Heckmondwike
“I had air vents installed in my windows and a special wall treatment to address mold issues, and I'm extremely pleased with the results. The team was professional, explained everything clearly, and worked efficiently. Highly recommend!”
Andy
Leeds
“A great job and went the extra mile. Lee sorted out a problem at my house while I was abroad and decorated after. He even colour matched the paint correctly. Really happy with his service. I would definitely recommend.”
About Us
Years of Experience Protecting Homes & Businesses
MJ Harwood is an independent damp proofing specialist and plastering contractor serving Leeds & West Yorkshire. We pride ourselves on offering a quality, affordable service to a wide range of clients, from homeowners to businesses and landlords. With years of experience in the industry, we bring expert knowledge and proven solutions to every project.
Our Commitment to You
- Quality affordable service across residential and commercial properties
- Years of hands-on experience in damp proofing and plastering
- Excellent friendly service with clear communication throughout
- Quality workmanship guaranteed on every project
- Fully approved by Age UK and Care & Repair Leeds
Frequently Asked Questions
Everything you need to know about our damp proofing services
How long does damp treatment take?
Most damp treatments are completed within 1-3 days depending on the severity and size of the affected area. We'll provide a clear timeline during your free survey.
Do you offer free surveys?
Yes, we provide completely free, no-obligation surveys. Our expert will assess your property, identify the cause, and provide a transparent fixed quote.
What guarantees do you offer?
We guarantee quality workmanship on every project. Our treatments use industry-leading materials and methods to ensure long-lasting protection for your property.
Do you work with landlords?
Absolutely. We work with homeowners, businesses, and landlords across Leeds & West Yorkshire. We're experienced in handling rental properties with minimal disruption to tenants.
What areas do you cover?
We cover Leeds and the wider West Yorkshire area. Contact us to confirm if we serve your location - we're happy to travel for the right project.
How quickly can you start?
We aim to respond to all enquiries within 24 hours and can often schedule surveys within a few days. Urgent cases are prioritised to prevent further damage.
Still have questions?
Can't find the answer you're looking for? Get in touch with our friendly team for a free consultation.