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Welwyn · AL6

Leak Detection in Welwyn

Non-destructive water leak detection across Welwyn, tracing hidden leaks with thermal imaging, acoustic sensors and tracer gas, then drying and treating the damage before it becomes mould.

Call 020 3051 8478Report a leak
★★★★★ 4.9 from 19 Google reviews · trusted by Welwyn homeowners, landlords & property managers
Quick answer: If you have a suspected water leak at a property in Welwyn, our specialists trace the source without tearing the place apart, using thermal, acoustic and tracer-gas methods. A leak is not over when the water stops. Mould can start within 48 hours, so we find the source, dry the structure and treat any mould, all with one company. Leak detection is £800 to £1500 depending on scale. Call 020 3051 8478.
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Leak to dry to treated, one company in Welwyn

Welwyn's housing mix spans Georgian and Victorian brick and flint cottages in the conservation area, interwar semis, and later infill homes around Mardley Heath and Oaklands. Older cottages often have altered pipework, extended bathrooms and low-pitched or flat-roofed additions squeezed onto period plots, all of which raise the risk of slow, hidden water leaks going unnoticed.

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 →

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 →

Areas of Welwyn we cover

We attend leaks right across Welwyn and its neighbourhoods, including:

Common leaks in Welwyn homes

Period cottages with altered plumbing

Many of Welwyn's older cottages along the High Street and surrounding lanes have been re-plumbed and extended over decades, often with bathrooms squeezed above original timber joists. Pipe runs boxed into tight voids are harder to inspect, so a failed joint or perished seal around a bath or shower tray can leak into ceilings below for weeks before staining or a soft floor gives it away.

Flat-roofed kitchen and bathroom extensions

Rear extensions added to Victorian and Georgian terraces in Welwyn frequently carry low-pitched or flat felt and asphalt roofs over kitchens or bathrooms. These coverings degrade with age and weather, allowing rainwater to track along timbers and plasterboard rather than showing directly beneath the leak point, which makes locating the true source without proper leak detection difficult for homeowners.

Ensuite and first-floor bathrooms in extended homes

Interwar and postwar houses around Oaklands and Mardley Heath have often gained additional ensuite bathrooms upstairs. Shower trays, bath seals and waste pipes in these later installations can fail quietly, sending water through the floor void into the room below. Combined with pressurised combi boiler systems, an escape of water here can affect ceilings, wiring and skirting before it is noticed.

What our customers say

Excellent
Rated 4.9 / 5 based on 19 reviews on

Was lovely working with the team and they did a fantastic and quick job to get all the mould out of my bathroom. Very much looking forward to working with them on other projects around my house!! Thank you for everything and shout out to Karim for being so sweet!

Mariama✓ a month ago

Omg what brilliant service, excellent the cleaner did a very good job was efficient he took his time and cleaned everything, highly recommend S. Bessim…

Susan Bessim✓ 2 months ago

Amazing company! They responding very quickly. They have a low prices as well, not crazy quotes like from others. Job has been done very quickly and team was very professional. I will use them in the future if I needed. Thanks!

Patryk Gutowski✓ 2 months ago

Really impressed with the whole experience. The surveyor did a proper, thorough job and didn't rush anything, they got to the root cause of the damp and explained it all clearly. Detailed, professional and reassuring from start to finish. Couldn't recommend them more highly.

Keiryn Raf✓ 3 months ago

Very professional and organised I must say came out and completed the work very efficiently customer service was excellent. Definitely recommend this damp and mould service to anyone looking for a job done correctly. :)

Joeie Rouse✓ 5 months ago
See all reviews on Google
Tip: If your water meter ticks over with every tap off, or a wall or ceiling stays damp with no obvious cause, there is a hidden leak. Finding it early is far cheaper than repairing the mould and damage it leaves behind.

Suspect a leak in Welwyn?

Call 020 3051 8478 or report a leak online. We trace, dry and treat for homeowners, landlords and managing agents across Welwyn.

Frequently asked questions

How much does leak detection in Welwyn cost?
Leak detection is £800 to £1500 depending on the scale and access. You get a written, insurance-ready report identifying the source.
Will you damage my home finding the leak?
No. We use non-destructive thermal imaging, acoustic sensors and tracer gas to pinpoint the leak before any access is opened up, so repairs are targeted.
Do you fix the damage after finding the leak?
Yes. A leak is not over when the water stops. We dry the structure with monitored dehumidifiers and treat any mould, so it is handled end to end.
Do you provide reports for insurance claims?
Yes. Every leak investigation comes with a clear written report including the cause, photographic evidence and recommendations, formatted for insurers and managing agents.

More help in Welwyn

Damp and mould survey

Find the real cause of damp, mould or a leak in a Welwyn property, with a written report and photographs. Damp survey in Welwyn →

Structural drying

Dry walls, floors and voids in Welwyn after a leak or flood, monitored to completion. Structural drying in Welwyn →

Mould removal

Treat black mould in a Welwyn property and fix the moisture source behind it. Mould removal in Welwyn →