Hertfordshire · London and the South East
Flat roof survey in Digswell, Hertfordshire
Need a flat roof survey in Digswell? We can help, with findings in writing and pictures to back them up. Book a weekday or weekend visit.
- Outlets that hold water back
- A sagging deck under the covering
- Failed seals around rooflight kerbs
Flat roof surveys for homes and businesses in Digswell
Buying a home with a flat-roofed extension, dormer or garage? It’s useful to know that roof’s condition before you exchange. Felt roofs often last around 15 to 20 years, while EPDM and GRP often last longer. We set out the type of covering, its condition and the defects we found, with photographs of each. That gives you facts to raise with the seller or agent. We are frequently asked to look into dips that suggest the deck is deflecting and blisters and bubbles in the covering, across single-ply membranes, GRP fibreglass and mastic asphalt.
In smaller places like Digswell, flat roofs are mostly on extensions, garages, porches and dormers. Even a small flat roof can let plenty of water into the room below. Knowing the covering and how it was laid tells you what to expect from it. From an upstairs window, look for standing water, splits and edges coming away.
How fast the report arrives depends on the package: the Basic Survey within 48 hours, the Standard Survey in 24 to 48 hours and the Premium Survey on the same day.
- Place
- Digswell (AL8, AL7, AL6)
- Region
- Hertfordshire
- Price
- From £150 inc. VAT
- Reports
- Emailed report with photos and recommendations
- Appointments
- Monday to Sunday, daytime
- Insurance
- Professional indemnity and public liability
- Call
- 07833 053749
- Last updated
- 27 October 2026
Digswell: your questions answered
Is my home in Digswell listed or in a conservation area?
For listing, use Historic England’s list; for conservation areas, ask the council. The answer matters most when a change of material is on the cards.
Do you cover smaller places like Digswell?
Yes, we do. We cover the whole of London and South East England, and smaller places are part of that. Longer journeys are simply planned ahead of time.
Is ponding on a flat roof a problem?
Water that lies on a flat roof for days is a sign that something needs attention. It could be the outlets, the falls or a deflecting deck. The survey looks at each and records the likely cause.
How long does the survey take?
That depends on the size and shape of the roof, but most surveys take roughly 1–2 hours at most homes, rising to roughly 3–4 hours on a commercial building. The written report follows by email.
What do I do with the report?
You will get the report by email. The Standard Survey includes a follow-up consultation, and the Premium Survey an in-person consultation, so you can talk the findings through.
Will you photograph what you find?
Yes, every report has them. Each finding is shown in a picture where possible, so you can see what we mean.
Do you go up onto the roof?
We inspect from wherever is safe: on the roof where it is safe, and from windows, nearby vantage points and inside. Fragile rooflights and fragile sheets are never walked on.
What we’re asked to look at in Digswell
Many flat roof problems start at the details rather than the main surface. Upstands, trims, outlets and rooflight kerbs each move and weather in their own way. Where they weren’t finished well, they tend to fail before anything else.
It is worth booking a survey if you’ve seen:
- Blisters and bubbles in the covering
- Signs of deflection in the roof deck
- Leaks around rooflights
- Standing water left after rain
Shop and office owners around Howard Centre may find that a flat roof over a business is out of sight and out of mind until it leaks.
Before you book anyone
- How long they’ve been surveying roofs
- Whether any drone flown is registered with the CAA
- How soon the report will arrive
- Whether the inside of the roof is included
What happens on the day
Photographs are taken throughout the visit, so you can see in the report what we found and where. Close-ups come from the safest viewpoint available, including by drone where it is applicable and the weather allows. A typical visit takes an hour or two for a small flat roof at home, and longer for a large commercial one. In a smaller place like Digswell, parking is seldom the issue; lanes, gates and long drives are worth mentioning. On bungalows and lower roofs, much can be seen from the ground, with the loft showing the underside.
- We agree the roof to be surveyed, its use and any leaks you know about.
- The roof is viewed from safe positions, including the roof itself where that is safe.
- We check the covering for splits, blisters, ponding and wear.
- We photograph and record the outlets, upstands, trims and rooflights.
- The report, with photos and recommendations, comes to you by email.
Before we arrive
- Make sure the loft hatch can be reached
- Note where any stains or damp appear
- Leave side gates unlocked
How to book
If you have photos of the roof, send them over. Pictures from ground level or a window are fine, and please do not climb up for a closer look. To get started, phone 07833 053749 or use the contact form.
Advice
What affects the cost of flat roof surveys
Survey packages start from £150, inc. VAT. What you pay for your roof depends on:
- The type of building, from a house to a block or an office
- The roof’s overall size
- The height of the building and how the roof can be seen safely
- The package you choose: Basic, Standard or Premium
The cost of a survey depends on the roof: its size, its height, how many sections it has and how safely it can be seen. Prices start from £150, including VAT.
What to tell us when you contact us
Some details help us suggest the right survey and price. When you contact us, it helps to mention:
- The reason for the survey, like buying, a leak or storm damage
- How the loft is reached, if there is one
- Pictures of the roof from a safe spot, if you have them
- The kind of building and roof involved
Once you know what you need, ring 07833 053749 or send us an email. We’ll suggest a package, agree the price and find a date.
Different roofs, different checks
Single-ply membranes
Single-ply relies on its welded laps staying sound. Seams, corners and the details around outlets and upstands get a close look.
Mastic asphalt
Mastic asphalt is a heavy, seamless covering often found on older blocks, balconies and commercial roofs. The survey checks for crazing, cracking, blistering and splits where the asphalt turns up the walls.
Flat and commercial roofs around Digswell
In this part of the South East, older roofs are mostly slate or clay tile and many newer ones concrete tile, and flat-roofed additions turn up almost everywhere. Flat roofs on extensions, dormers, garages and business units are found alongside them almost everywhere. Welwyn Garden City, which Digswell is part of, was laid out as a garden city in the early twentieth century. Its first houses are now over a hundred years old, with later estates and newer homes around them. Older roofs may still have their original coverings, with fixings and underlay that have done a long stint.
If you let a flat or house near Welwyn North station, a flat roof over a rented flat is easy to forget until the tenant reports a leak. The streets around a church like Digswell Village Church are often among the oldest in a place, and if you own one of the older houses nearby, the joins between later flat roofs and the old walls are where problems usually start.
Digswell is about 1 mile north of Welwyn Garden City, in Hertfordshire. Roofs in Digswell get the same thorough look as anywhere else in Hertfordshire. Digswell is one of the places in Hertfordshire we cover. For surveys nearby, see our London page.
All of AL8, AL7 and AL6 is within our area for flat roof surveys. Local streets include Adele Avenue, Station Road and Hertford Road. Close by, we survey roofs in 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). We also work in nearby towns like 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).
What’s near Digswell
Around Digswell, our work takes us to homes and buildings near Hedgehog pub, Monk's Walk School and Danesbury Park, among other places. Digswell has its own railway station: Welwyn North station. Other landmarks nearby include Howard Centre (1.3 miles south) and Datchworth Museum (2.6 miles north-east). Green spaces nearby include Tewin Orchard and Hopkyns Wood.
Towns and villages near Digswell
What else we do in Digswell
Useful tips for Digswell property owners
Getting the most from a flat roof survey starts before we arrive and carries on afterwards. Some tips:
- Book a survey every few years
- Keep clear of rooflights and fragile roof sheets
- Check new fixings through the roof are properly sealed
- Note where water lies after a downpour
Questions about the findings are always welcome. Standard Surveys come with a follow-up consultation, and Premium Surveys with an in-person one, so you can talk the findings through.
Check the roof from a window after a downpour. If water is still there a day or two later, have it checked.
Landlord and commercial surveys in Digswell
Managing agents and residents’ management companies use roof surveys to plan maintenance. The report sets out what needs attention now and what can wait.
A roof problem in a let property affects your tenants as well as the building. A survey shows what needs attention, so you can plan the work with less disruption.