Project-managed refurbishment & building, London Covering all London boroughs 07498 597339
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Damp and mould remediation for London landlords by GMAS Group

Damp, Mould & Awaab's Law

Damp and mould, dealt with properly.

For landlords and agents who need it gone and need it documented. We find the cause, remove the mould, fix what is letting it in, and hand you the written report and photographs that show you acted. One managed job, across London.

What we do

Diagnosed, treated,
documented.

Most damp jobs get painted over and come back. We treat the cause and give you the paperwork, which is what the law now expects and what protects you if a tenant complains.

Documented investigation

A proper survey that identifies the cause and produces the written report Awaab’s Law expects, not a guess and a quote.

Damp diagnosis

Penetrating, rising or condensation. We work out which one you actually have before pricing a fix.

Mould removal & treatment

Safe removal, antimicrobial treatment and making the surface good. Not a coat of paint over the problem.

Ventilation & prevention

Extractors, trickle vents and humidity control that stop condensation mould coming back.

Repairs & making good

Plastering, tanking, sealing and redecoration, so the room is finished, not just treated.

Compliance pack

Report, photographs and completion sign-off, ready to show the tenant, the agent or the council.

The Awaab's Law clock

The law now runs
on a timer.

Once a tenant reports damp or mould, the landlord is on a fixed clock.

24 hrs
Emergencies made safe

The most serious hazards must be made safe within 24 hours.

10 days
Investigate the hazard

A reported damp and mould hazard must be investigated within 10 working days.

3 days
Findings to the tenant

Written findings must reach the tenant within 3 working days of the investigation ending.

5 days
Safety works begun

Works to make the home safe must begin within 5 working days.

Who it's for

One contractor,
the paperwork done.

Private landlords

Get ahead of the rules coming under the Renters’ Rights Act, and protect yourself from a tenant claim now.

Letting & managing agents

A single managed contractor for damp and mould across the portfolio, with the paperwork done for you.

Social landlords & associations

Remediation and documentation that fits the Awaab’s Law timescales you are already bound by.

Homeowners

Damp or mould in your own home diagnosed at the cause and put right for good.

How it works

From report
to sign-off.

Report it

Send us the address and a photo. We book a survey quickly, because the clock matters.

Documented survey

We attend, find the cause and produce a written investigation report with photographs.

Costed plan

A clear, fixed-price plan for the remediation, with the timescale set out in writing.

The works

Cause fixed, mould removed and treated, ventilation sorted, room made good.

Sign-off pack

Completion report, photographs and sign-off, ready for the tenant, agent or council.

Common questions

Damp, mould and the law,
answered.

What is Awaab’s Law?

Awaab’s Law sets legal deadlines for landlords to investigate and fix damp, mould and other health hazards once a tenant reports them. It has applied to social landlords in England since October 2025 and is being extended to private landlords under the Renters’ Rights Act 2025.

Does Awaab’s Law apply to private landlords yet?

The fixed timescales currently bind social landlords. The Renters’ Rights Act 2025 extends Awaab’s Law to private landlords, with the start date still to be confirmed. Landlords already have a duty to keep a home free of serious damp and mould.

How quickly do I have to act?

For social landlords the clock is 10 working days to investigate a reported damp and mould hazard, written findings to the tenant within 3 working days, safety works started within 5 working days, and emergencies made safe within 24 hours. If the home cannot be made safe in time, the landlord must arrange alternative accommodation at their own cost.

Do you provide a report I can show the tenant, agent or council?

Yes. Every job includes a written investigation report setting out the cause, the works needed and the timescale, with photographs and a completion sign-off. It is the paper trail that proves you acted.

Do you fix the cause or just cover it up?

We diagnose and treat the cause first. Painting over mould without fixing the cause is why it keeps coming back, and it will not satisfy Awaab’s Law.

Which areas do you cover?

All 32 London boroughs, with a focus on west and south-west London: Chelsea, Kensington, Fulham, Chiswick, Hammersmith, Wandsworth, Wimbledon, Putney, Ealing and Notting Hill.

Is black mould dangerous?

The NHS advises that damp and mould can cause breathing problems and asthma attacks, with babies, older people and those with respiratory conditions more at risk. It should be dealt with promptly.

Can I just clean the mould off?

Cleaning removes what you can see, but if the moisture is still there it grows back. Lasting removal means finding and fixing the cause as well as treating the surface.

Get it dealt with

Damp or mould
been reported?
Send it over.

Give us the address and a photo. We will survey it, tell you the cause, and come back with a fixed price and the paperwork you need.

Where the moisture comes from

Mould is the symptom. Damp is the cause.

Removing mould without finding the moisture behind it means it comes back, usually within weeks.

Condensation

Moist air from cooking, bathing and drying clothes settles on cold walls, window reveals and corners.

Penetrating damp

Rain getting through the building: failed pointing, cracked render, blocked or leaking gutters, defective flashings or bridged cavity walls.

Rising damp

Ground moisture rising through a wall with no working damp proof course, or where outside ground or render has been built up over it.

Leaks

Plumbing, waste pipes, shower trays and roof leaks. These are usually localised and need fixing before any treatment is worthwhile.

Mould removal done properly

Treated, fixed and kept from coming back.

Inspect and measure

Moisture readings, the pattern of the damp, and the outside of the building are checked so the cause is identified, not guessed.

Treat the mould

Affected surfaces are cleaned with a fungicidal treatment. Badly affected plaster, sealant or materials that cannot be cleaned are removed and replaced.

Fix the cause

Ventilation, extract fans, heating, insulation, gutters, pointing or leaks are repaired depending on what the inspection found.

Make good and record

Walls are redecorated with a suitable finish, and landlords receive a written record of what was found and what was done.

Coverage

Areas we cover.

We take damp and mould work across all 32 London boroughs. Most of our work is in west London, in Shepherd's Bush, Hammersmith, Fulham, Kensington, Chiswick and White City, and in south west London, in Putney, Wandsworth and Wimbledon. We also work in south east London, in Greenwich, Blackheath and Lewisham.

If your property is outside these areas, call us anyway. We travel across London and will tell you honestly if a job is too far to price properly.

Message us
Call GMAS on 07498 597339