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Simpled Services
Mould removal specialist treating a mould-affected wall in Cardiff

Mould removal in Cardiff

Simpled Services provides specialist mould removal in Cardiff - removing black mould and condensation mould from the city's Victorian terraces, student houses and rented homes across South Wales, with a free assessment and a 12-month guarantee.

Why Cardiff homes suffer from mould

Cardiff's mild, wet coastal climate and rows of Victorian terraces - especially the dense student housing in Cathays and Roath - create ideal conditions for condensation. Solid walls, high rainfall and intensively occupied lets mean indoor humidity stays high and black mould appears on cold walls and around windows.

We treat mould across Cardiff, from Cathays and Roath to Canton and Grangetown, removing it safely and fixing the moisture problem behind it.

Black mould on a wall in a Cardiff property

Our mould removal process

A proven four-step process that treats the cause, not just the symptom - so the mould stays gone.

  1. 1

    Assess

    We inspect the affected areas and find the moisture source driving the mould - not just the visible growth.

  2. 2

    Contain

    We seal off the area so spores don't spread to clean rooms while we work.

  3. 3

    Remove

    We safely treat and remove all mould using professional-grade methods, then anti-microbial protect the surface.

  4. 4

    Restore & prevent

    We repair any damage and advise on ventilation and damp control so the mould doesn't come back - backed by our 12-month guarantee.

Before. After. No filter.

We don't paint over mould. Every job: find the cause, kill the spores, fix the moisture source, then refinish - anything else just comes back.

Before mould removal - Hackney Victorian terrace - black mould treated, moisture source fixed, walls refinished, 12-month guarantee.Before
After mould removal - Hackney Victorian terrace - black mould treated, moisture source fixed, walls refinished, 12-month guarantee.After
Hackney Victorian terrace - black mould treated, moisture source fixed, walls refinished, 12-month guarantee.
Before mould removal - Streatham kitchen ceiling - mould removed, ventilation upgraded, ceiling professionally refinished.Before
After mould removal - Streatham kitchen ceiling - mould removed, ventilation upgraded, ceiling professionally refinished.After
Streatham kitchen ceiling - mould removed, ventilation upgraded, ceiling professionally refinished.
Before mould removal - Croydon bathroom - severe mould, failed extractor replaced at the root cause, anti-mould finish.Before
After mould removal - Croydon bathroom - severe mould, failed extractor replaced at the root cause, anti-mould finish.After
Croydon bathroom - severe mould, failed extractor replaced at the root cause, anti-mould finish.
Before mould removal - Watford 2-bed flat - whole-property treatment, dehumidifier fitted to fix the cause, all rooms refinished.Before
After mould removal - Watford 2-bed flat - whole-property treatment, dehumidifier fitted to fix the cause, all rooms refinished.After
Watford 2-bed flat - whole-property treatment, dehumidifier fitted to fix the cause, all rooms refinished.
Before mould removal - Bedroom corner - condensation mould treated and the wall brought back to clean, sound plaster.Before
After mould removal - Bedroom corner - condensation mould treated and the wall brought back to clean, sound plaster.After
Bedroom corner - condensation mould treated and the wall brought back to clean, sound plaster.

More before/afters available on request - we document every single job.

Backed by a 12-month guarantee

If treated mould returns within 12 months, we come back and put it right. Accredited, insured and DBS-checked teams on every job.

WhatsApp us a photo

Mould removal across Cardiff

We cover Cardiff and South Wales, including:

  • Cathays
  • Roath
  • Canton
  • Grangetown
  • Splott
  • Adamsdown
  • Riverside
  • Heath
  • Llandaff
  • Penylan

Not listed? We cover all of Cardiff - call our mould team on 020 4572 5885 or request a free assessment below.

Why untreated mould is a real risk

Mould releases allergens and mycotoxins that can trigger coughing, wheezing, throat and skin irritation, and asthma attacks - a particular danger for children, the elderly and anyone with a respiratory condition. Left alone, it also damages plaster, timber and decor, turning a small problem into an expensive one.

Acting early protects both your health and your property. We deal with mild surface mould and severe, widespread infestations alike.

A clean, healthy living room after professional mould treatment

Why choose Simpled Services

  • 30+

    Years of experience

  • 8,500+

    Jobs completed

  • 500+

    Positive reviews

  • 24/7

    Availability for your needs

Accredited & insured

  • CHAS
  • Cyber Essentials
  • SafeContractor
  • Constructionline
  • Gas Safe Register
  • SSIP
  • ISO 9001
  • ISO 14001
  • ISO 45001
  • RISQS

Frequently asked questions

Do you treat student houses in Cathays and Roath?
Yes - the student terraces in Cathays and Roath are among the most mould-prone in Cardiff. We handle landlord and letting-agent work with documented before-and-after evidence.
What is your 12-month guarantee?
If mould we have treated returns within 12 months, we come back and put it right. We treat the moisture source behind the mould, not just the surface, which is why we can stand behind the work.
How quickly can you come out?
We aim to respond fast and offer a free, no-obligation assessment. Send us a photo on WhatsApp for an even quicker initial view.

Free mould assessment in Cardiff

Tell us about the problem and your Cardiffpostcode - we'll come back fast with a free, no-obligation quote.

How should we contact you? *

WhatsApp needs a UK mobile number; email needs a valid email address.

No obligation. We usually reply within the hour during opening hours.