Hertfordshire · London and the South East
Willian Roof Leak Investigation
Tracing where water is getting into your roof in Willian. More than 5,000 surveys completed across London and South East England.
- Brown rings on upstairs ceilings
- Water coming in around a roof light or dormer
- Damp walls below an overflowing gutter
Before and after the survey
These tips come from what we see on roofs every week, before and after a survey:
- Check the loft is accessible
- Record whether it leaks in every downpour or only some
- Do not touch fittings that water is reaching
- Mention any plumbing above the damp area
The report gives whoever carries out the work a clear starting point. The photos show the defects and where they are, rather than at the stain.
Do not block the vents at the eaves. Air movement keeps condensation down, and condensation is a common false alarm. Keep insulation clear of the eaves.
Roof leak investigation in Willian: what you get
Some ‘leaks’ are not leaks at all. In a badly ventilated roof space, condensation can form under the roof and drip, leaving marks that look just like rainwater. Telling the two apart matters, since the cure for one will not solve the other. We look at the pattern of damp, the weather and the ventilation before reaching a view. We survey slate and tile slopes, valleys and parapet gutters and chimney stacks, and people most often book us about water dripping from rafters or underlay and drips from nail tips in a cold loft.
Being in a small place like Willian makes no difference to how a leak or storm damage is looked at: the journey and access are just planned beforehand. It’s useful to know where the water appears, in what weather, and what you’ve seen outside, plus any earlier repairs. Photographs of the stain and of the roof from outside are helpful too.
We write the report in plain English, so it makes sense without any roofing background. Photographs show what each point refers to, with the urgent items made clear.
- Place
- Willian (SG6)
- Region
- Hertfordshire
- Cost
- From £150 inc. VAT
- Report
- Written, with photos, emailed to you
- Survey days
- Weekdays and weekends
- Cover
- Professional indemnity and public liability
- Telephone
- 07833 053749
- Updated
- 27 October 2026
Landlord and commercial surveys in Willian
Managing agents and residents’ management companies use roof surveys to plan maintenance. Recommendations are set out by urgency where it matters, which helps with budgets and planning.
We also survey roofs for businesses and commercial landlords. Larger roofs take longer.
Willian questions
Is Willian within the area you cover?
Yes, Willian is covered. We cover the whole of London and South East England, and smaller places are part of that. Longer journeys are simply planned beforehand.
Do you carry out roof surveys in Willian?
Yes, Willian is one of the places we work. Every survey there gets the same written report with photos.
Will I get photos?
Yes. We photograph the roof as we go, and they go into the written report.
Can you find a leak when it is not raining?
In most cases, yes. Damp materials can be found without rain. If a leak only appears in driving rain from one direction, we’ll tell you what we found and what’s most likely.
How much does a roof leak investigation cost in Willian?
Our price is from £150, including VAT. You’ll know the price for the job before booking. For a price, ring 07833 053749 or email us.
How should I prepare for the leak investigation?
Keep a note of when it leaks, and take photos. Move stored items away from the loft hatch. Keep away from any light or socket that water is reaching.
How long will you be at the property?
The visit usually takes an hour or two at a typical home, while a commercial roof takes nearer three to four hours. We’ll give you an idea of timing as you book.
Leave it or get it looked at?
Damp loft insulation loses much of its value. A slow leak can soak it for months before a stain appears. The sooner the cause is found, the less needs replacing. For older village homes like those around Willian, the right replacement materials aren’t always easy to find quickly. Spotting a problem early leaves room to find them.
A Basic Survey starts from £150, inc. VAT. Standard is from £250 and Premium from £400. You will know the exact price before booking.
Why choose Independent Roof Survey in Willian
- Plain-English reports with photos
- 98% of clients satisfied
- A sub-250g drone, flown with a CAA Flyer ID and Operator ID
- Clear package prices, inc. VAT
Take a look at our cost guide and two real surveys.
More services for Willian
Different roofs, different checks
Parapet and box gutters
We check the linings, joints and outlets where we can see them safely, and look for signs of past overflowing.
Lead flashings
Mortar fillets are sometimes used instead of lead. Fillets crack and pull away over time, letting rain run behind the joint.
Honest limits
To be straight with you, there are limits to any roof survey:
- Plumbing leaks that look like roof leaks
- A structural engineer’s report
- The repair itself (the investigation finds and reports the cause)
Not sure which survey suits your roof? You can phone 07833 053749 or drop us an email and we’ll tell you before booking. What our survey covers.
Roofs we survey in Willian
- Valleys and parapet gutters
- Chimney stacks
- The roof space
- Flat roof details
- Slate and tile slopes
- Rooflights and dormers
- Lead flashings
Wind, rain and roofs in Willian
Letchworth Garden City, which Willian is part of, was laid out as a garden city in the early twentieth century. The original garden city houses are now more than a century old, alongside later estates. Older roofs may still have their original coverings, with fixings and underlay that have done a long stint. There are about 500,000 buildings on England’s list of listed buildings, and around 10,000 conservation areas. If your home is listed, changes that affect its special interest need listed building consent, and in a conservation area re-roofing in different materials may need permission, so check with the council.
If you own a rental within reach of Letchworth Garden City station, tracing a leak quickly matters when a tenant is living with it. If you look after a building such as Lordship Farm Primary School, a leak through a large roof is frequently found some distance from where the water shows inside. If you live in an older home near Church of All Saints, old mortar, worn lead and slipped slates are the usual suspects when water gets in.
Willian is about 1 mile south of Letchworth, in Hertfordshire. In Willian, as across Hertfordshire, every roof gets the same careful survey. We cover towns and villages across Hertfordshire. There is also a page for Milton Keynes.
All of SG6 is within our area for roof leak investigations, from the main roads to the quietest streets. We cover properties on Willian Road, Brandles Road and Wymondley Road and the roads around them. If you’re just outside Willian, we cover Letchworth (1 mile north), Letchworth Garden City (1 mile north), Great Wymondley (1 mile south-west), Walsworth (2 miles west) and Poets Estate (2 miles south-west). We also work in nearby towns like Stevenage (4 miles south-east), St Albans (15 miles south), Welwyn Garden City (11 miles south), Harpenden (11 miles south-west), Hatfield (14 miles south) and Hertford (13 miles south-east).
Landmarks near Willian
Around Willian, our work takes us to homes and buildings near The Fox at Willian pub, Church of St Paul and The Highfield School. For rail, the closest station is Letchworth Garden City station, roughly 1.4 miles north of the centre. Other landmarks nearby include Lister Hospital (2.5 miles south) and First Garden City Heritage Museum (1.1 miles north). Not far away are Purwell Ninesprings.
How it works
Every visit follows the same pattern: we listen to what’s been worrying you, look at the roof from every safe viewpoint, photograph what we find and record our findings for the written report. Most visits take about one to two hours, more where the leak is intermittent or the roof is large. Somewhere as small as Willian, access is often the only tricky part. Mention any outbuildings, barns or garages you want included, and anything about the roof you already know. Weekday and weekend visits are available.
- We help you choose the package that suits the leak.
- A visit is booked for a weekday, Saturday or Sunday.
- We inspect inside and out, starting from the stain.
- Moisture detection and thermal imaging are used where your package includes them and they help.
- You get photos, the likely cause and clear recommendations.
Before we arrive
- For flats, make sure roof access has been agreed
- If you’re buying, check with the agent that we can get in
- Jot down any questions you want answered
Arrange a survey
To book a survey, phone 07833 053749 or send us an email and tell us the address and what’s prompted the survey. You will know the price before anything is booked.