Damp, mould & leak services in Cannon Street
Cannon Street sits at the heart of the Square Mile and is dominated by Victorian and Edwardian commercial buildings converted into residential flats, alongside modern high-rise developments built above retail and office space. This dense, mixed-use environment creates persistent damp and moisture problems, as aging stone facades, shared drainage infrastructure and basement-level conversions are all highly vulnerable.
Leak Detection
Trace hidden water leaks without damage using thermal, acoustic and tracer-gas methods. Leak detection →
Damp Investigation
Identify rising damp, penetrating damp and condensation, and tell them apart properly. Damp investigation →
Mould Inspection
Find the moisture source feeding the mould, not just treat the surface. Mould inspection →
Structural Drying
Dry out walls, floors and voids after a leak or flood, monitored to completion. Structural drying →
Areas of Cannon Street we cover
We survey properties right across Cannon Street and its neighbourhoods, including:
- City of London
- Monument
- Bank
- Mansion House
- Walbrook
- Eastcheap
- Queen Victoria Street
- Upper Thames Street
- Cannon Street Station Quarter
- Cheapside
- London Bridge
- Aldgate
- Threadneedle Street
- Fenchurch Street
Common damp problems in Cannon Street homes
Penetrating Damp in Victorian Commercial Conversions
Many residential properties along Cannon Street occupy upper floors of former Victorian commercial buildings with solid masonry walls and no cavity. Without a cavity to interrupt moisture transfer, rainwater driven against ageing stonework and eroded mortar joints can penetrate directly into internal plasterwork. Residents often notice tide marks and staining on external-facing walls, particularly following prolonged wet spells typical of London winters.
Basement and Lower-Ground Floor Water Ingress
Several converted buildings in the Cannon Street area feature basement or lower-ground floor units positioned below the historic street level of the City. Rising groundwater, combined with the proximity to the buried River Walbrook and historical underground watercourses, places these units at elevated risk of rising and lateral damp. Failed tanking membranes and compromised drainage channels are frequently identified during survey work in these spaces.
Hidden Leaks Within Shared High-Rise Infrastructure
Modern residential blocks near Cannon Street Station and along Upper Thames Street rely on complex shared pipework, flat roofing systems and centralised drainage stacks. Leaks from communal supply pipes, roof terrace waterproofing failures and poorly maintained expansion joints can remain undetected for months, travelling between floors before revealing themselves as ceiling staining, bubbling paint or mould growth on internal partition walls.
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
Book a survey in Cannon Street
Call 020 3051 8478 or request a survey online. We work with homeowners, landlords and property managers across Cannon Street. Works are on a 50% upfront, 50% on completion basis.