Hertfordshire · London and the South East
Flat roof survey in Welwyn, Hertfordshire
Wondering about the flat roof at a property in Welwyn? We carry out flat roof surveys in Welwyn and across Hertfordshire, with plain-English findings.
- Ponding water that doesn’t drain away
- Raised blisters across the surface
- Upstands pulling away from walls
Flat roof survey in Welwyn
Each type of flat roof has its own weak points. Felt can blister and crack, asphalt can craze and split, EPDM seams and laps can lift, and GRP can crack where boards meet or at the trims. Single-ply PVC and TPO roofs are checked at their welds, edges and fixings. Once you know the covering and its condition, planning the next step is far easier. We survey upstands and outlets, felt flat roofs and single-ply membranes, and common reasons people get in touch are blisters and bubbles in the covering and edge trims that have lifted or split.
In a smaller place like Welwyn, some flat roofs sit in the open, so wind catches loose edges and trims. Sun on a flat roof also ages felt and bitumen. Splits, blisters and lifting edges are what to look out for. A flat roof that still holds water days after rain is also worth a closer look.
We write the report in plain English, so you don’t need to be a roofer to follow it. Each point is backed by a photograph where possible.
- Place
- Welwyn (AL6)
- Region
- Hertfordshire
- Cost
- From £150 inc. VAT
- Your report
- Written, with photos, emailed to you
- Appointments
- Weekdays and weekends
- Insurance
- Professional indemnity and public liability
- Phone
- 07833 053749
- Updated
- 27 October 2026
Welwyn questions
Is Welwyn in the area you cover?
Yes, Welwyn is within the area we cover. We survey roofs across London and the South East. Just call 07833 053749 or send us an email and let us know about the property, and we’ll talk through which survey suits.
How do I find out if my home in Welwyn is listed?
Start with Historic England’s list for listing and your council for conservation areas. Either can affect what roof work is allowed, so it’s worth checking before planning any.
What’s the best way to book?
To arrange a survey, phone 07833 053749 or drop us an email with the address, the type of property and what’s prompted the survey. We’ll confirm the price and agree a day with you.
Do you survey on Saturdays and Sundays?
We carry out surveys on any day of the week. To arrange a date, phone 07833 053749 or send us an email.
Will you photograph what you find?
Yes, every report has them. Each finding is shown in a picture where possible.
Does the weather affect the survey?
A survey can usually go ahead in light rain. High wind or heavy rain can stop drone flights and make roof access unsafe, so we’ll agree a new date if the weather is not suitable.
Do I have to be there for the survey?
Not necessarily. An outside-only look can be arranged beforehand, but the loft and any rooms with damp need someone to let us in.
How the survey changes by roof type
EPDM rubber
Lifting at the edges and loose areas of membrane are common EPDM problems. Any we find are noted and photographed.
Single-ply membranes
Single-ply membranes can be damaged by foot traffic and equipment on the roof. Any tears, punctures or loose membrane are recorded with photos.
Local flat roofs in Welwyn
Digswell House, about 0.9 miles south-east, is one of the historic houses in the wider area around Welwyn. Older roofs in the wider area can hide decades of patch repairs, so the detail matters, and a listed home or one in a conservation area may need consent for changes of material. 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. Mixed in with those pitched roofs are lots of flat ones, over rear extensions, dormers, garages and shops.
If you look after a building such as Monk's Walk School, ponding and blocked outlets on a wide flat roof are worth catching before the next wet season. For businesses in and around places like Howard Centre, flat roofs over shops and units are easy to forget until water comes through a ceiling. The streets around a church such as Parish Church of St Mary are frequently among the oldest in a place, and if you own one of the older houses nearby, later flat-roofed additions are common on older houses, and their edges and upstands frequently show the first signs of wear.
Welwyn is about 2 miles north-west of Welwyn Garden City, in Hertfordshire. If you are in Welwyn, booking works exactly as it does anywhere else: a call or an email, a price, then a date. Our area takes in places right across Hertfordshire. There’s also a page for London.
Every address in AL6 is covered for flat roof surveys. That includes homes and businesses on High Street, London Road and Mimram Place. We also cover Monkswood (1 mile south-east), Ayot St Peter (1 mile south-west), Ayot Green (1 mile south-west), Pottersheath (2 miles north) and Codicote (2 miles north-west). Further out, we also cover Watford (14 miles south-west), Hemel Hempstead (12 miles south-west), Stevenage (6 miles north), St Albans (7 miles south-west), Harpenden (6 miles west) and Hitchin (9 miles north).
Near you in Welwyn
In Welwyn, that means homes and buildings near Stable Door pub, Danesbury Park and Homerswood Primary and Nursery School and the streets around them. The closest station to Welwyn is Welwyn North station, roughly 1.1 miles south-east. Well-known places in the area include Queen Elizabeth II Hospital (3.5 miles south) and Datchworth Museum (2.7 miles north-east). The countryside around Welwyn includes Mardley Heath.
Landlord and commercial surveys in Welwyn
Landlords, agents and building managers in Welwyn and across Hertfordshire can book any of our surveys. To discuss a property or a block, ring 07833 053749 or use the contact form.
Surveys can also be booked by buyers’ agents acting for a client. The report is emailed, so it can go straight to your client.
Why act early in Welwyn
On a commercial building, a flat roof leak can disrupt tenants, staff and stock. Surveying the roof in good time means work can be planned and budgeted around the business. Blocked gutters on homes around Welwyn overflow and soak walls, particularly where trees overhang. Dealing with the cause is simple; drying out a wall is not.
A Basic Survey starts from £150, inc. VAT. The Standard Survey starts from £250 and the Premium Survey from £400. You will know the price for the job before booking.
Why book with us
- Surveys on weekdays, Saturdays and Sundays
- 98% customer satisfaction
- We hold a CAA Flyer ID and Operator ID
- An independent view of the roof
Take a look at how roof surveys are priced and what we found on two real jobs.
Practical tips
Nothing here needs a ladder. Our suggestions:
- Plan a survey before the covering reaches the end of its usual life
- Check from a window for ponding after heavy rain
- Keep outlets clear of leaves and moss
- Keep records of when the roof was laid and what work has been done
For landlords and building managers, the report is a dated record of the roof’s condition. It’s useful when planning upkeep and setting budgets, and it makes changes easy to spot at the next survey.
Try not to let a flat roof become a walkway. Where someone does need access, ask them to use boards or a protected route, and remind them never to step on rooflights or fragile sheets.
What happens on the day
Safety comes first on every visit. We inspect what can safely be seen, and anything we cannot see is noted in the report. Most visits take roughly 1–2 hours at a typical home, or half a day or so for a commercial building. A visit to Welwyn is planned like any other: the time, the access and where to park are agreed beforehand. Weekday and weekend visits are both possible. Tell us about any garages, outbuildings or extensions you want included.
- First we go through the roof, what’s beneath it and any problems so far.
- We check the roof from the ground, windows and the roof where it is safe.
- The covering is checked for wear, splits, blisters and standing water.
- We photograph and record the outlets, upstands, trims and rooflights.
- The report, with photos and recommendations, comes to you by email.
Preparing for the visit
- Have any questions written down, so nothing gets missed
- If the roof is shared, arrange access with whoever manages the building
- Keep pets out of the way during the survey
How to book
To book a survey, phone 07833 053749 or use the contact form and tell us the address and what’s prompted the survey. We will confirm the price before you book.
Related advice
Honest limits
Without opening up the roof, some things stay hidden, so a survey has limits:
- An exact number of years the roof has left
- Whether old sheeting or boards contain asbestos
- Whether the deck or joists are strong enough
Not sure which survey suits your roof? You can phone 07833 053749 or drop us an email and we will tell you. What our survey covers.
What we check
- Felt flat roofs
- EPDM rubber
- Upstands and outlets
- Single-ply membranes
- Mastic asphalt
- GRP fibreglass