Hertfordshire · London and the South East
Tewin Wood Roof Leak Investigation
Know where you stand with the leaking roof before you spend money on it. We carry out roof leak investigations in Tewin Wood, with photographs and a clear written report.
- Drips from nail tips in a cold loft
- Water dripping from rafters or underlay
- Ceiling stains that grow after rain
When to book a survey in Tewin Wood
Many leaks begin at a flashing. Where a roof meets a chimney, a wall or a dormer, lead or mortar seals the joint. Once that seal cracks or lifts, water gets behind it.
It is worth booking a survey if you’ve seen:
- Drips from nail tips in a cold loft
- Damp patches next to the stack
- Staining where a gutter or parapet meets the wall
- Damp ceilings under a flat roof
If you run a business near Howard Centre, finding where water is getting in quickly keeps disruption down.
Before booking any roof surveyor
- Whether the inside of the roof is included
- What’s outside the scope of the survey
- Whether VAT is in the quoted price
- What insurance they carry
Roof leak investigation in Tewin Wood: what you get
On a flat roof, water can travel a long way under the covering. Common causes are splits and blisters, tired upstands and outlets that don’t drain. Ponding water makes any weakness worse. We check the roof surface and the ceiling below. Leaks under flat extension, garage and dormer roofs are common. Felt often lasts around 15 to 20 years, so age is part of the picture. Typical surveys look at wet patches high on an inside wall and staining around the chimney inside, on rooflights and dormers, flat roof details and the roof space.
Somewhere as small as Tewin Wood, older roofs have often been repaired many times. That makes it hard to tell new damage from old wear, and the difference matters, particularly to an insurer. The report says what was seen and what it points to. Older walls and timbers hold water for a long time, so it’s worth finding the cause soon.
After the visit, you get a photo-illustrated written report, emailed to you. It explains the condition of the leaking roof, the defects we found and what we recommend.
- Place
- Tewin Wood (AL6)
- Wider area
- Hertfordshire
- Cost
- From £150 inc. VAT
- Your report
- Emailed report with photos and recommendations
- Appointments
- Monday to Sunday, daytime
- Cover
- Professional indemnity and public liability
- Telephone
- 07833 053749
- Updated
- 27 October 2026
Prices for roof leak investigations in Tewin Wood
Prices vary from roof to roof, and it comes down to:
- Any need for thermal images or a drone flight
- How many separate roofs there are, like extensions, dormers and garages
- The height of the building and how the roof can safely be seen
- The shape of the roof and its details
Every price we give includes VAT, and the written report is part of the package. Roof leak investigation starts from £150, including VAT. Size, height and access decide where your roof falls.
Booking your survey
We will normally ask about:
- Photos of the roof, taken safely from the ground or a window
- The reason for the survey, such as buying, a leak or storm damage
- Dates you are working to, such as exchange
- Anything about access we should know
Once you know what you need, phone 07833 053749 or email us. We’ll suggest a package, agree the price and find a date.
Roof by roof
Lead flashings
Some roofs have mortar where you’d expect lead. They crack as the roof and wall move, letting rain run behind the joint.
Flat roof upstands and outlets
Flat roof water can travel under the covering before it shows. Where conditions allow, moisture readings and thermal imaging help narrow it down.
Surveys for landlords and agents in Tewin Wood
We also survey roofs for businesses and commercial landlords. Bigger roofs take more time, and they’re priced for the size.
Any of our surveys can be booked by landlords, agents and building managers in Tewin Wood. To discuss a property or a block, ring 07833 053749 or email us.
Tewin Wood questions
Is Tewin Wood in the area you cover?
Yes, Tewin Wood is one of the places we work. The survey and report are the same in Tewin Wood as anywhere else, and visits run on weekdays and weekends.
How do I find out if my home in Tewin Wood is listed?
You can check whether a building is listed on Historic England’s list, and your council can tell you if it’s in a conservation area. Listed building consent is needed for changes that affect a listed building’s special interest, and conservation areas can limit changes of roofing material.
Do you carry out surveys on Saturdays and Sundays?
We survey on any day from Monday to Sunday, during the day, which suits people who work during the week. Let us know your preferred days when you book.
Do you look in the loft space?
If the survey needs it and the loft space can be reached safely, yes. Please clear anything stored under the hatch.
How quickly is the report sent?
The Premium Survey report comes the same day, the Standard within 24–48 hours and the Basic within 48 hours. All of them come by email.
How do I arrange a roof leak investigation in Tewin Wood?
To arrange a survey, ring 07833 053749 or email us with the address, the type of property and what’s prompted the survey. We’ll confirm the price and agree a day with you.
Will you definitely find the leak?
We can’t promise to find every leak on one visit. Many leave clear signs, but some only appear in certain weather. The report sets out what we found and the most likely routes.
Also near Tewin Wood
Other services in Tewin Wood
What happens on the day
Time on site depends on the size and shape of the roof; as a rough guide, the survey takes an hour or two on an ordinary house, with bigger or more complicated roofs taking longer. You’re welcome to ask questions while we’re there. Cottages and farmhouses around Tewin Wood often have roofs at several levels, with lean-tos and outbuildings attached. Each part is looked at from wherever it can safely be seen.
- You tell us where the water appears, when, and what the weather was doing.
- Inside, we look at the stain and the ceiling around it.
- In the loft, we follow any signs of water back towards the roof.
- We inspect the likely entry points outside, from the ground, windows and the roof where safe.
- We email a written report showing where the water most likely gets in.
Before the survey
- Check the loft hatch can be reached
- Make a note of anything you’d like us to look at
- If you are buying, let the agent know when we are coming
Arrange a survey
Surveys can be booked for weekdays, Saturdays or Sundays. To find a date that works for you, call 07833 053749 or drop us an email.
Advice
Should I look at the roof myself first?
Look up at the roof after a storm, from ground level: broken slates or tiles in the garden, gaps along the ridge or loose lead are signs to note. Don’t go up yourself.
After heavy rain, check ceilings and the tops of walls for new stains. Take a photo and write down when you saw it, which helps when we check the roof.
Tewin Wood roofs and the weather
Older houses in the South East often have slate or clay tile roofs, while many later estates have concrete tiles. The covering and its details give the first clues when tracing where water is coming from. Historic houses like Digswell House, about 2.1 miles south-west, show how far back building in the area around Tewin Wood goes. If your home is one of the older ones, expect a mix of original materials and later repairs on the roof, and a listed home or one in a conservation area may need consent for changes of material.
Landlords with a home close to Welwyn North station may find that a tenant living with a leak needs the cause found, not just the stain painted over. Anyone responsible for a site like Ridgeway Academy will know that a leak through a large roof is frequently found some distance from where the water shows inside.
Tewin Wood is about 3 miles north-east of Welwyn Garden City, in Hertfordshire. In Tewin Wood, as across Hertfordshire, every roof gets the same careful survey. Tewin Wood is one of the towns and villages in Hertfordshire where we work. You can also see our page for London.
All of AL6 is within our area for roof leak investigations, from the main roads to the quietest streets. Streets in the area include Cowpers Way, Desborough Drive and Firs Walk, and we cover them all. If you’re just outside Tewin Wood, we cover Burnham Green (1 mile north-west), Bull's Green (1 mile north), Harmer Green (1 mile west), Tewin (1 mile south) and Datchworth (1 mile north). We also work in nearby towns like Watford (15 miles south-west), Hemel Hempstead (14 miles south-west), Stevenage (5 miles north), St Albans (9 miles south-west), Bishop's Stortford (14 miles east) and Welwyn Garden City (3 miles south-west).
Near you in Tewin Wood
Around Tewin Wood, our work takes us to homes and buildings near Belmont pub and the streets around them. The closest station to Tewin Wood is Welwyn North station, roughly 1.4 miles west of the centre. A little further out are Howard Centre (2.8 miles south-west) and Hertford Castle (4.3 miles south-east). Green spaces nearby include Tewin Orchard and Hopkyns Wood.