Damp · Mould · Leak in Streatham
Mould Treatment, Damp Surveys & Leak Detection in Streatham
Our surveyors investigate damp and mould in Streatham’s Victorian and Edwardian terraces and converted flats, trace hidden leaks without ripping the place apart, and write the insurance-ready report your claim needs, across SW16.
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Fully insured · Non-invasive methods first · Written reports included · London & Surrey
Why Streatham homes get damp, mould and hidden leaks
Streatham stretches along one of London’s longest high streets and is built mostly on Victorian and Edwardian terraces, with a large number of converted flats and mansion blocks along Streatham High Road and Streatham Hill. That mix shapes the faults we see. In the period terraces our surveyors most often trace penetrating and rising damp behind bay windows and chimney breasts, and slow concealed leaks under solid ground floors. In the many converted flats the biggest problems are escape of water from a flat above and condensation mould in cold, poorly ventilated rooms. Mould is a symptom, not the cause, so we investigate the moisture source before anything is treated.
Mould and condensation in Streatham’s converted flats
Streatham has a great deal of flat conversions, and condensation mould in bathrooms, kitchens and bedrooms is one of the most common problems we are called to. Our team carries out a thorough damp and mould survey, works out whether the moisture is coming from a leak, penetrating damp or condensation, and only then plans the mould treatment and any ventilation improvements. That is how you stop mould returning rather than painting over it, and for tenants and landlords it provides the written evidence needed to deal with damp and mould properly.
Trace, access and insurance-ready reports for SW16
Escape of water between flats is common in Streatham’s conversions and mansion blocks, and a lot of our work is trace and access with an insurance claim attached. Our engineers locate the leak non-invasively with thermal imaging, acoustic listening and moisture mapping, open up only the exact spot that needs it, and hand you a clear written report with photos and readings. We establish whether the leak sits in your flat or the communal pipework and provide the insurance-ready evidence a loss adjuster or managing agent needs.
What we do in Streatham
Every job starts with finding the real cause, not painting over the symptom.
Mould treatment & investigation
We find the moisture source, treat the mould and tackle the cause so it is far less likely to return, with a written report.
Damp & mould surveys
A proper diagnosis (condensation, penetrating or rising damp) so you fix the right thing once.
Trace & access (insurance)
We find and expose the leak and document it for your escape-of-water claim.
Insurance-ready reports
Clear, evidenced reports written for insurers, solicitors and managing agents.
Leak detection
Thermal imaging, acoustic and moisture tracing to pinpoint a hidden leak before any wall comes down.
Emergency & burst pipes
Urgent cases are prioritised when water is coming through a ceiling or a pipe has burst.
Moisture mapping & thermal imaging
Calibrated readings and thermal surveys that show exactly where the moisture is, and where it isn’t.
CCTV drainage surveys
Camera surveys that find blockages, collapses and leaking joints that feed damp into a property.
Real investigations by our team
Genuine photographs from DML jobs across London & Surrey, not stock imagery.
How we investigate
Non-invasive first. We open up only when we know exactly where the problem is.
Visual inspection
A methodical room-by-room inspection of the affected areas, inside and out.
Moisture readings
Calibrated moisture meter readings across walls, floors and ceilings.
Thermal imaging
Infrared scanning, where suitable, to reveal hidden moisture and cold spots behind finishes.
Acoustic & tracer gas
Acoustic listening and tracer gas, where suitable, to pinpoint concealed pipe leaks.
Pressure testing
Pressure testing of heating and supply pipework where suitable.
Photos & written report
Photographs, readings and clear findings in a written report you can act on.
Insurance leaks & trace and access
Trace and access may be covered under buildings insurance, depending on the policy. We provide insurance-ready reports and evidence to support the claim. Our Streatham engineers give you the non-invasive trace, the photographs and readings, and a written report you can hand straight to your insurer or loss adjuster.
Insurance, landlords and tenants in Streatham
Reports prepared to support insurance, landlord, agent or housing matters. Trace and access may be covered under buildings insurance, depending on the policy. We provide the photographs, readings and written evidence to support the claim. For landlords and housing providers, our reports are suitable as supporting evidence for housing, landlord or compliance matters. Written workmanship terms apply where relevant.
Book a damp, mould or leak investigation in Streatham
Covering Streatham and the surrounding area. Call free, WhatsApp us, or request a call back and one of our team will get straight back to you.
Get a call back☎ 0800 054 1524WhatsApp us
Insured
Included
Prioritised
Evidence Reports
Terms
Get a call back about your Streatham property
Tell us what’s happening and one of our team will call you back. For urgent problems call 0800 054 1524.
Areas we cover around Streatham
Tooting · Balham · Mitcham · Clapham · Mould Treatment · Insurance Leak Investigations
We also attend Streatham Hill, Streatham Common, Streatham Vale and the Rookery.
Frequently asked questions: Streatham
My mould keeps coming back after redecorating. Why?
Because mould is a symptom, not the cause. In converted flats it is often condensation from poor ventilation. Our surveyors find the cause first and set out the fix in writing, so any mould treatment that follows actually lasts.
I have a leak from the flat above. Can you trace it?
Yes. Escape of water between flats is common in Streatham’s SW16 conversions and mansion blocks. We trace the source, establish whether it is in your flat or the communal risers, and document it for the freeholder, managing agent and insurer.
Can you find a leak without damaging my home?
Yes. We use thermal imaging, acoustic listening and moisture mapping to pinpoint the leak, then open up only the precise spot rather than the whole room.
Will my insurance pay for the work?
Trace and access may be covered under buildings insurance, depending on the policy. We provide insurance-ready reports and evidence to support the claim.
How quickly can you reach Streatham?
SW16 is on our south London patch. Call 0800 054 1524 for the earliest available appointment; urgent leaks are prioritised.
Last reviewed: 27 October 2026. Independent investigation and written reports. Repairs are quoted separately.