Hertfordshire · London and the South East
London Colney Roof Leak Investigation
Roof leak investigations in London Colney from an independent, experienced roof surveyor. More than 20 years and over 5,000 surveys.
- A leak that comes and goes with the weather
- Stains around a skylight
- Damp underlay across a wide area
Roof leak investigation in London Colney: what you get
Roof leaks rarely show up where you’d expect. Water frequently travels along timbers or underlay before it finds a way down, so the stain on your ceiling is seldom right under the hole. Our leak investigation traces it back. Patching the spot above the stain often misses the real cause. Finding the route first lets the repair go where it is needed. If you’ve noticed leaks below a flat extension roof and damp on a chimney breast, we can find out what’s behind it, on valleys and parapet gutters, slate and tile slopes and chimney stacks alike.
Around London Colney, chimneys on older homes are a common source of leaks, at the flashings, the pointing or the mortar round the pots. Damp on a chimney breast isn’t always rain from above, which is why it is worth tracing properly. It is worth looking at the stack from outside and at the timbers beside it in the loft.
The report is written in plain words, so it makes sense without any roofing background. Each point is backed by a photo where possible, and recommendations are put in order of urgency where relevant.
- Location
- London Colney (AL2, AL1)
- Region
- Hertfordshire
- Prices
- From £150 inc. VAT
- Your report
- A written report with photos, by email
- When we survey
- Weekdays and weekends
- Insured
- PI and public liability insurance
- Telephone
- 07833 053749
- Updated
- 27 October 2026
For landlords and managing agents
Freeholders and residents’ companies use a roof report to plan and budget, with the most urgent items set out first.
Buyers’ agents can book surveys on behalf of their clients. The report is emailed, so it can go straight to your client, photos included.
When to book a survey in London Colney
Flashings are one of the commonest sources of roof leaks. Lead or mortar closes the gap wherever a roof meets a wall, chimney or dormer. Once that seal cracks or lifts, water gets behind it, frequently well away from where it shows.
We’re frequently asked to look at:
- Drips from nail tips in a cold loft
- Damp ceilings under a flat roof
- Brown rings on upstairs ceilings
- Water dripping from rafters or underlay
Living close to Highfield Park is pleasant, but mature trees mean leaves in gutters and valleys each autumn, and blocked gutters overflow and soak walls.
Questions to ask before you book
- Is there a chance to talk the report through?
- What the survey will not cover
- Which viewpoints they use to see the roof
- How long they’ve been surveying roofs
Towns and villages near London Colney
Also in London Colney
Wind, rain and roofs in London Colney
About 3.9 miles north-west lies Batchwood Hall, a reminder of how long the area around London Colney has been built on. Older roofs in the wider area can hide decades of patch repairs, so the detail matters. In this part of the South East, older roofs are mostly slate or clay tile and many newer ones concrete tile, with flat-roofed extensions, dormers and garages common everywhere. The covering and its details give the first clues when tracing where water is coming from.
If you run a business near The Maltings, finding where water is getting in quickly keeps disruption down. If you look after a building such as Bowmansgreen Primary School, tracing a leak on a big roof starts with where the water appears and works back.
London Colney is about 2 miles south-east of St Albans, in Hertfordshire. Surveys in London Colney work the same way as everywhere we cover: a careful inspection, photographs and a written report. Our area takes in places right across Hertfordshire. We also survey roofs in London.
All of AL2 and AL1 is within our area for roof leak investigations. We offer roof leak investigations to properties on High Street, London Road and Haseldine Road and the roads around them. We also cover the places around London Colney: Broad Colney (1 mile south), Tyttenhanger (1 mile north), Shenleybury (1 mile south), Sleapshyde (2 miles north-east) and Colney Heath (2 miles north-east). We also work in nearby towns such as Watford (6 miles south-west), Hemel Hempstead (7 miles west), Stevenage (14 miles north), Welwyn Garden City (7 miles north-east), Harpenden (7 miles north) and Hoddesdon (12 miles east).
What’s near London Colney
We work in homes and buildings around White Horse pub, Highfield Park and Samuel Ryder Academy. The nearest railway station is Park Street station, about 1.9 miles west of the centre. Nearby you will also find Napsbury Hospital (0.5 miles west) and St Albans Musical Museum (2.6 miles north-west). Green spaces nearby include Verulamium Lake and Broad Colney Lakes.
London Colney questions
Do you carry out roof surveys in London Colney?
Yes. We work right across London and South East England, and London Colney is part of that. You can call 07833 053749 or drop us an email with the address and a few details, and we’ll talk through which survey suits.
Is London Colney within the area you cover?
We do. A small place gets exactly the same survey as a big one.
What does a roof survey cost?
Our price is from £150, including VAT. What you pay for your roof depends on its size, height, access and the package.
Does the investigation include the repair?
The investigation is about finding the cause. The repair itself is a separate job. You get a report with photos showing where the water is getting in and what needs attention, which whoever carries out the work can follow.
Is it a leak or condensation?
It is a common question. Leaks tend to follow wet weather and show in one place, while condensation is often spread out and worse in cold weather. We tell you which it is most likely to be.
Do you carry professional indemnity insurance?
Our surveys are covered by professional indemnity and public liability insurance. If you need details for a managing agent or a building owner, just ask.
Do you test for asbestos?
No. Asbestos surveys and sampling aren’t something we do. Where a material might contain it, such as old cement sheets on a building from before 2000, the report flags it, with a recommendation to have a specialist asbestos surveyor check before it is disturbed.
What happens if roof problems are left?
Guesswork repairs are a common reason leaks keep coming back. The real way in may be a metre or more away. We find the probable source before anyone starts work. On a bungalow or cottage around London Colney, the roof sits close to the rooms below, so a small leak can mark a ceiling within a few storms. Catching the cause first saves redecorating as well.
Simple, low roofs take less time to survey than tall or complicated ones, and the package you pick makes a difference too. We’ll give you the figure before anything is booked.
Why us?
- Surveys seven days a week
- 20+ years’ experience
- More than 5,000 surveys completed
- 98% of customers satisfied
Read how roof surveys are priced and what we found on two real jobs.
What we do, step by step
We photograph the roof as we go, so you can see in the report what we found and where. We take close-ups from wherever is safe, including by drone where it is applicable and the weather allows. A typical visit takes about one to two hours, more where the leak is intermittent or the roof is large. A visit to London Colney is planned like any other: the time, the access and where to park are agreed beforehand. Visits can be on weekdays, Saturdays or Sundays. If there are outbuildings or garages you want looked at, mention them.
- We help you choose the package that suits the leak.
- We agree a date, including weekends.
- The investigation works from the stain back to the roof.
- Where it is useful and included, we take moisture readings and use thermal imaging.
- You get photos, the likely cause and clear recommendations.
How to prepare
- Agree roof access with the managing agent if it is shared
- Leave side gates unlocked
- Make a note of anything you’d like us to look at
How to book
Not sure which survey you need? The easiest way is to phone 07833 053749 or email us and describe the roof and what’s worrying you. We’ll explain the options and the price.
Advice
What we cannot see
Every survey has limits, and we’d rather be clear about that before you book. Bear these in mind:
- Structural calculations (that is a structural engineer’s job)
- Plumbing leaks that look like roof leaks
- The repair itself (the investigation finds and reports the cause)
If in doubt, ring 07833 053749 or drop us an email and we’ll recommend the right survey before you book. The full list of what we check.
What we check
- Lead flashings
- Slate and tile slopes
- The roof space
- Flat roof details
- Valleys and parapet gutters
- Rooflights and dormers
- Chimney stacks
What affects the cost of roof leak investigations
Not every roof costs the same to survey, and it comes down to:
- How many separate roofs there are, like extensions, dormers and garages
- The type of building, from a house to a block or an office
- The shape of the roof and its details
- The height of the building and how the roof can safely be seen
For a price for your roof in London Colney, ring 07833 053749 or drop us an email and let us know about the roof. The price is agreed before a date is set.
What we need to know
If you can, have these to hand when you contact us:
- Whether there is a loft hatch, a shared roof or tricky access
- Where the property is, with the postcode
- Dates you’re working to, such as exchange
- What kind of property and roof it is
We confirm the exact price before booking, so you know where you stand. Prices start from £150, including VAT. For a price for your roof, phone 07833 053749 or send us an email.