Leak to dry to treated, one company in Swiss Cottage
Swiss Cottage's housing runs from tall Victorian and Edwardian mansion blocks around Fitzjohns Avenue to 1930s purpose-built flats near Finchley Road and the Grade II* listed Alexandra Road Estate. Many Victorian houses have been divided into flats with shared bathrooms and limited ventilation, while solid brick mansion blocks and ageing concrete estate buildings both struggle to manage moisture, making condensation and penetrating damp mould a recurring issue.
Mould Treatment
Treat and prevent the mould that follows water damage, dealing with the moisture source first. Mould treatment →
Damp Investigation
Tell rising damp, penetrating damp and condensation apart, so the right repair is done once. Damp investigation →
Leak Detection
Trace hidden water leaks without unnecessary damage using thermal, acoustic and tracer-gas methods. Leak detection →
Structural Drying
Dry walls, floors and voids after a leak or flood with monitored dehumidifiers, to completion. Structural drying →
Areas of Swiss Cottage we cover
We treat mould right across Swiss Cottage and its neighbourhoods, including:
- Belsize Park
- Hampstead
- West Hampstead
- South Hampstead
- Primrose Hill
- St John's Wood
- Frognal
- Fitzjohns Avenue
- Finchley Road
- Kilburn
- Maida Vale
- Camden Town
- Childs Hill
Common causes of mould in Swiss Cottage homes
Mansion block condensation around cold sash windows
The solid brick mansion blocks around Fitzjohns Avenue and Netherhall Gardens still have many original single-glazed sash windows set into thick, cold masonry. Warm, moist air from cooking and drying clothes meets these cold surfaces and condenses on reveals and frames, feeding black mould in corners and along window sills. Without better ventilation or insulation at these cold bridges, mould returns each winter regardless of surface cleaning.
Windowless bathrooms in subdivided Victorian terraces
Many Victorian terraces near Swiss Cottage were split into flats decades ago, often leaving internal bathrooms with no window and reliance on ageing or absent mechanical extraction. Steam from showering has nowhere to escape, settling on ceilings, tiling grout and behind bath panels as persistent mould. Landlords frequently paint over it, but until proper extraction is fitted and ducted outside, the moisture source remains and the mould reappears within weeks.
Penetrating damp in concrete estate and 1930s flats
The Alexandra Road Estate's concrete construction and the flat roofs and parapets on nearby 1930s blocks are prone to penetrating damp where movement joints, roof coverings or render have failed with age. Water tracking through these defects leaves damp patches on external walls that develop mould behind wardrobes, beds and fitted furniture pushed against cold walls. Treating the mould without repairing the roof or render at the entry point simply lets it return.
What our customers say
I have been dealing with damp and mould for years but these guys were able to come in and resolve the problem quickly and professionally. Their prices were fair and reasonable and they got the job done clean. 10/10 would use again and would recommend.
Thersa Waron Eurmind, via Google
Very helpful and professional, easy to communicate with about my mould issues and I received fast responses from the company on the best solutions for me. would recommend to all friends and family. 5/5
Jensen B, via Google
I recently used a damp and mould specialist company and was extremely impressed with the service from start to finish. From the initial survey, they were knowledgeable, thorough, and took the time to clearly explain the cause of the issue rather than just treating the symptoms.
Tarik Barak, via Google
Mould problem in Swiss Cottage?
Call 020 3051 8478 or book a mould survey online. We remove mould and fix the cause for homeowners, landlords and managing agents across Swiss Cottage.