Hertfordshire · London and the South East
Roof leak investigation in Digswell, Hertfordshire
Tracing where water is getting into your roof across Digswell, using drones and thermal imaging where applicable. Get in touch for a price.
- Damp on a chimney breast
- Staining where a gutter or parapet meets the wall
- Water coming in around a roof light or dormer
Roof leak investigation in Digswell: what you get
We investigate roof leaks in Digswell and across London and South East England. We visit on any day of the week. We look inside and out, at flashings, valleys, chimneys, gutters and flat roof details. You get a photo-illustrated written report and recommendations. If it’s leaking right now, contain the water and keep it clear of electrics, and then call 07833 053749 or email us to arrange a visit. We are often asked to look into water through the ceiling under a flat roof and damp walls below an overflowing gutter, on rooflights and dormers, valleys and parapet gutters and lead flashings.
Chimney stacks on older houses around places like Digswell can let water in, at the flashings, the pointing or the mortar round the pots. Damp in a chimney breast can have more than one cause, so it is not always obvious where it starts. The stack, its flashings and the loft space beside it are all worth checking.
With the Standard Survey, you also get moisture detection, a structural check and a follow-up consultation. The Premium Survey goes further, with thermal imaging, drone inspection where applicable, structural analysis and an in-person consultation.
- Location
- Digswell (AL8, AL7, AL6)
- Wider area
- Hertfordshire
- Cost
- From £150 inc. VAT
- Your report
- A written report with photos, by email
- When we survey
- Monday to Sunday, daytime
- Insurance
- Professional indemnity and public liability
- Call
- 07833 053749
- Updated
- 27 October 2026
Checking the roof from the ground
Fresh stains on ceilings or walls after rain are worth noting. Take a photo and write down when you saw it, as it helps a surveyor trace the cause.
Your own check is a good start, but it is not a survey. From ground level, valleys, flashings and the backs of chimneys are often out of sight.
How the survey changes by roof type
Lead flashings
Lead flashings seal the joints at chimneys, walls and dormers. Lifted, split or slipped lead is a common cause.
Slate and tile slopes
On slate roofs, corroded nails let slates slip. Even a single gap can let water in.
Tips from our surveys
You don’t need to be a roofer to help. Here’s what helps most:
- Check the loft is accessible
- Take dated photos of the leak
- Mention any plumbing above the damp area
- Put a bucket under the drip and move valuables
The report gives whoever carries out the work a clear starting point. They’ll see exactly where the problem is, so the repair is aimed at the cause.
Have leaves and moss cleared from gutters, valleys and outlets, especially in autumn. Many leaks start with a blocked outlet. Leave the clearing to someone with the right equipment.
Digswell roofs and the weather
With Digswell House about 0.3 miles west, Digswell sits in an area with a long building history. On older houses around here, roofs often carry the marks of earlier repairs, from replaced slates to new lead, and the council can say whether a home is in a conservation area. Older houses in the South East often have slate or clay tile roofs, while many later estates have concrete tiles. Knowing the roof type helps narrow down where water may be getting in.
The streets around a church like Digswell Village Church are frequently among the oldest in a place, and if you own one of the older houses nearby, lead flashings, valleys and old chimneys are typical places for water to get in. Shop and office owners around Howard Centre may find that a quick answer on where water is coming in keeps a business running.
Digswell is about 1 mile north of Welwyn Garden City, in Hertfordshire. Houses, flats, blocks and commercial buildings in Digswell can all book roof leak investigations, with a written report and photographs every time. Our area takes in places right across Hertfordshire. There is also a page for London.
All of AL8, AL7 and AL6 is within our area for roof leak investigations. You will find streets like Adele Avenue, Station Road and Hertford Road. We also cover the places around Digswell: Haldens (1 mile south-east), Harmer Green (1 mile north-east), Burnham Green (2 miles north-east), Oaklands (2 miles north) and Tewin (2 miles east). Within a short drive, we also cover Watford (14 miles south-west), Hemel Hempstead (12 miles west), Stevenage (6 miles north), St Albans (7 miles south-west), Harpenden (6 miles west) and Hitchin (10 miles north).
Near you in Digswell
Typical jobs here are in homes near Hedgehog pub, Monk's Walk School and Danesbury Park. There’s a railway station in Digswell itself: Welwyn North station. Well-known places in the area include Howard Centre (1.3 miles south) and Datchworth Museum (2.6 miles north-east). Not far away are Tewin Orchard and Hopkyns Wood.
What happens on the day
Once we have finished looking, we write up our findings in a report with photographs, sent to you by email. As for time on site, most surveys take about one to two hours for most homes, though a hard-to-trace leak can take longer. For a survey in Digswell, we agree the time, the access and parking before the day. Visits can be on weekdays, Saturdays or Sundays. Let us know about any garages, outbuildings or extensions you want included.
- You pick a Basic, Standard or Premium Survey.
- A visit is booked for a weekday, Saturday or Sunday.
- The investigation works from the stain back to the roof.
- Where it’s useful and included, we take moisture readings and use thermal imaging.
- The report explains the likely entry point and what needs attention.
Getting ready for the survey
- Show us where any leaks or stains appear
- Have any questions written down, so nothing gets missed
- Buyers: confirm access with the estate agent or seller
How to book
A quick phone call is usually the easiest start: ring 07833 053749 or send us an email, and we will ask about the building and what you need. You’ll have a price before anything is arranged.
Read more
Digswell questions
Do you cover smaller places like Digswell?
Yes, Digswell is covered. Our area covers London and the South East, from towns to the smallest villages. The journey is planned ahead, so it is useful to know about access.
Does a conservation area affect roof work in Digswell?
The council and Historic England’s list are the places to check. Either can affect what roof work is allowed, so it’s worth checking before planning any.
Why isn’t the leak directly above the stain?
Because water travels. It runs along rafters, battens or underlay before it drips, so the stain may be some distance from where it gets in. That is why we trace the route rather than patching above the stain.
How soon will I get the report?
That depends on the survey you book: Basic within 48 hours, Standard in 24–48 hours and Premium the same day. Reports are sent by email.
What does a roof survey cost?
Our price is from £150, including VAT. The final figure depends on the roof and the package you choose, and it’s agreed before booking.
What does the report include?
It explains what we saw, what it means and what we’d suggest, with photos throughout. It also says if any part of the roof couldn’t be seen safely.
Is this an asbestos survey?
No. We can flag materials that might contain asbestos, but only a specialist asbestos surveyor can confirm it. It may be present in buildings built or refurbished before 2000.
When you need someone else
This is not a RICS building survey, a structural engineer’s report or an asbestos survey. Other limits to bear in mind:
- Defects hidden under coverings or inside walls without opening up
- A promise to find every leak on a single visit
- Water from pipes, tanks or heating systems
Not sure which survey suits your roof? You can phone 07833 053749 or drop us an email and we’ll tell you. The full list of what we check.
What this survey covers
- The roof space
- Lead flashings
- Valleys and parapet gutters
- Chimney stacks
- Flat roof details
- Slate and tile slopes
- Rooflights and dormers
Do you need a roof leak investigation in Digswell?
Valleys carry a lot of water. Split linings, slipped valley tiles or debris can send that water under the coverings. The stain may appear well away from the valley itself.
Things that often lead to a survey include:
- Water coming in around a roof light or dormer
- Drips in the loft during heavy rain
- Wet patches high on an inside wall
- Damp on a chimney breast
Take a building like Harwood Hill Junior Mixed Infant and Nursery School: on a building that size, finding the source of a drip means looking well beyond the stain.
Choosing a roof surveyor
- If they fly a drone, whether they hold a CAA Flyer ID and Operator ID
- How they plan to inspect the roof safely
- Whether the inside of the roof is included
- Are they insured for the work?