Condensation left untreated leads to black mould, timber rot and structural damage. Act early — it costs significantly less to fix.
CSRT Qualified Specialists · London

Is Condensation Causing Damp & Mould in Your Property?

Streaming windows, damp patches and black mould are signs your building has a condensation problem — not just bad weather. We find the root cause and fix it properly.

🎓 CSRT Qualified
🏢 Residential & Commercial
📍 Across most London & Hertfordshire
🔧 Supply & Installation
📞 24/7 Emergency Line

Does Your Property Have Any of These Problems?

Condensation is the most common cause of damp in UK properties — and it’s frequently misdiagnosed. These are the signs you have a condensation issue rather than rising damp or a leak.

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Water on windows

Persistent droplets on glass, especially overnight or first thing in the morning

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Black mould on walls

Mould in corners, behind furniture or on external walls — often misread as a leak

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Peeling paint or wallpaper

Bubbling or lifting near windows, corners or on cold external walls

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Musty smell

A persistent damp odour even after cleaning — often most noticeable in bedrooms or bathrooms

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Steamy rooms after use

Kitchens or bathrooms that take a long time to clear after cooking or showering

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Damp patches on ceilings

Tide marks or damp spots appearing on ceilings in rooms directly below bathrooms

How We Diagnose and Fix Condensation

We don’t guess and we don’t recommend solutions before we understand the cause. Every job starts with a proper survey.

1

Survey

A CSRT-qualified specialist visits to assess moisture levels, airflow and the causes specific to your building

2

Diagnosis

We identify whether it’s ventilation, heating patterns, occupancy habits, or structural factors — or a combination

3

Recommendation

A clear, written report with honest options and costs — no unnecessary upselling

4

Installation

We supply and fit the right solution — from extract fans to full PIV systems — with minimum disruption

Condensation Control Solutions We Provide

The right solution depends on your property type and the severity of the problem. We’ll recommend the most appropriate and cost-effective option after your survey.

💨 Positive Input Ventilation (PIV)

A whole-house system that gently introduces filtered, drier air from the loft, diluting and displacing moist stale air throughout the property. Suitable for most homes and flats.

🔄 Mechanical Extract Ventilation

Continuous or demand-controlled fans installed in bathrooms and kitchens to remove moist air at source before it migrates to cooler rooms.

🏠 Condensation Control Units

Standalone or ducted units designed for properties where loft installation isn’t possible — including flats, basement conversions and commercial spaces.

🔧 Ventilation System Servicing

Existing ventilation systems need regular maintenance to operate effectively. We service, clean and repair all major types of mechanical ventilation.

For Homeowners & Landlords

Homeowners

Protect your home and your family’s health

  • Persistent condensation and mould correctly diagnosed
  • Permanent solutions, not temporary fixes
  • Honest, written survey report you can rely on
  • Minimal disruption during installation
  • Advice on preventing recurrence long-term
Landlords & Property Managers

Meet your legal obligations and protect your asset

  • HHSRS-aware assessments for rental properties
  • Documentation to demonstrate duty of care
  • Works carried out with minimal tenant disruption
  • Multi-property and portfolio work accommodated
  • Commercial buildings and HMOs covered

Frequently Asked Questions

Is condensation the same as rising damp?
No — and the distinction matters because the fix is completely different. Rising damp travels up from the ground and typically affects walls up to about one metre from the floor. Condensation forms when warm, moist indoor air meets a cold surface. The two can look similar, which is why a proper survey is essential before any treatment is recommended.
Why is my home suddenly getting condensation when it didn’t before?
Changes in occupancy, new double glazing (which reduces natural air leakage), draught-proofing, lifestyle changes, or a boiler replacement can all alter the moisture balance in a property. Modern, well-insulated homes are actually more prone to condensation than older draughty ones because warm moist air no longer escapes as easily.
Will a ventilation unit solve my mould problem?
Improving ventilation addresses the cause of condensation-related mould. However, any existing mould will need to be treated separately — ventilation prevents new mould forming, but won’t remove what’s already there. We can advise on mould remediation as part of the same visit.
How much disruption does installation cause?
Most systems can be installed in a single day with minimal disruption. A PIV unit requires loft access and a small ceiling grille in a hallway. Extract fans require access to an external wall or roof. We’ll talk through exactly what’s involved during your survey.
Do you work in commercial properties?
Yes. We work across offices, retail units, HMOs, schools, and larger commercial buildings. The principles are the same but the scale and solution type differ. Contact us to discuss your specific building and we’ll advise on the right approach.

Trusted by Homeowners & Landlords Across London

Book Your Condensation Survey

Speak to a CSRT-Qualified Specialist

Tell us about your property and the problem you’re experiencing. We’ll recommend the right survey and talk you through what to expect before you commit to anything.

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Call us 020 4542 6114
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Email us info@dampandmouldsolutions.co.uk
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Based in North West London

💡 Tip: Send photos of the affected area to info@dampandmouldsolutions.co.uk — the more we can see upfront, the faster we can help.

Request a Survey

Fill in your details and we’ll get back to you promptly.

    Don’t Let Condensation Get Worse

    Every week left untreated increases the risk of mould, timber damage and health issues. Get a proper diagnosis from a CSRT-qualified specialist.