Hertfordshire · London and the South East
Flat Roof Survey in Lemsford
Surveys of flat roofs on homes, extensions and commercial buildings across Lemsford, using drones and thermal imaging where it applies. Get in touch for a price.
- Upstands pulling away from walls
- Dips that suggest the deck is deflecting
- Water getting in at rooflights
Local flat roofs in Lemsford
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. Next to the main roofs there is normally a flat roof somewhere, whether on an extension, a garage or a commercial unit. With Digswell House about 1.9 miles north-east, Lemsford sits in an area with a long building history. Older roofs in the wider area can hide decades of patch repairs, so the detail matters, and the council can say whether a home is in a conservation area.
For site and facilities teams at buildings such as Applecroft School, schools and public buildings often have big flat roofs, and their outlets and upstands need regular checks. If you live in an older home near Church of St John the Evangelist, later flat-roofed additions are common on older houses, and their edges and upstands often show the first signs of wear.
Lemsford is about 2 miles west of Welwyn Garden City, in Hertfordshire. Roofs in Lemsford get the same thorough look as anywhere else in Hertfordshire. Lemsford is one of the places in Hertfordshire where we work for flat roof surveys. You can also see our page for London.
Here we cover the AL8 postcode area for flat roof surveys. That includes homes and businesses on Mill Close, Lemsford Village and Great North Road. We also cover the places around Lemsford: Stanborough (1 mile south), Coleman Green (2 miles west), Cooper's Green (2 miles south-west), Hatfield (2 miles south) and Smallford (3 miles south-west). Further out, we also cover Watford (12 miles south-west), Hemel Hempstead (10 miles west), Stevenage (8 miles north), St Albans (5 miles south-west), Harpenden (5 miles west) and Hitchin (11 miles north).
Local landmarks in Lemsford
Typical jobs here are in homes near Stanborough Park, Stanborough School and The Sun Inn. The nearest railway station is Welwyn Garden City station, about 1.2 miles east. Well-known places in the area include Queen Elizabeth II Hospital (2.1 miles south-east) and The Bunker at Hatfield Police Station (2.1 miles south). The countryside around Lemsford includes Lemsford Springs.
About our flat roof survey in Lemsford
Our Basic Survey, from £150, gives you a visual inspection with photos and written recommendations. For moisture detection and a structural check, the Standard Survey starts from £250. On a flat roof, moisture readings can help show whether water has got under the covering. Larger commercial roofs are quoted for their size. We survey single-ply membranes, EPDM rubber and felt flat roofs, and common reasons people get in touch are cracked or split membrane and outlets that hold water back.
In a village or hamlet like Lemsford, flat roofs are normally on extensions, garages, outbuildings or barn conversions. The checks are the same as anywhere: the covering, the edges, the upstands and where water drains away. The journey and access are planned beforehand. Garages and outbuildings are easy to forget, so mention any you want included when you book.
You can share the report with anyone who needs it: your solicitor, the seller, your insurer, a roofer or the building’s managing agent.
- Location
- Lemsford (AL8)
- Wider area
- Hertfordshire
- Cost
- From £150 inc. VAT
- Your report
- Written, with photos, emailed to you
- Appointments
- Monday to Sunday, daytime
- Cover
- Professional indemnity and public liability
- Call
- 07833 053749
- Last updated
- 27 October 2026
What this survey cannot tell you
No survey can tell you everything, and we’d rather be clear about that before you book. Keep these in mind:
- A promise that the roof won’t leak in future
- A structural engineer’s assessment of the deck
- Parts of the roof that are not safe to walk on or view
If in doubt, ring 07833 053749 or send us an email and we will point you to the right survey. What a survey covers and does not.
Roofs we survey in Lemsford
- Single-ply membranes
- GRP fibreglass
- Mastic asphalt
- Felt flat roofs
- EPDM rubber
- Upstands and outlets
Why act early in Lemsford
Most flat roofs are out of sight, so they’re easy to forget. Owners often learn the roof is at the end of its life only when it leaks. A survey every few years stops that from catching you out. In a small place like Lemsford, homes can be exposed to wind and rain, which finds any gap, and damp in older walls is slow to dry out.
Our price is from £150, including VAT. Packages run from Basic at £150 through Standard at £250 to Premium at £400, inc. VAT, and we can help you choose.
What you get with us
- Clear package prices, inc. VAT
- Surveys on weekdays and at weekends
- Independent findings on the roof’s condition
- 5,000+ surveys completed
Take a look at how roof surveys are priced and two real surveys.
What we’re asked to look at in Lemsford
Buyers often book after their home survey suggests a closer look at a flat roof. Owners and managing agents use a survey to plan upkeep, or ahead of a sale or a new lease. In each case, the report gives a written, photographed record of the roof’s condition.
Most people get in touch when they’ve noticed something like this:
- Pools of water lying on the roof
- A sagging deck under the covering
- Water getting in at rooflights
- Failed upstands where the roof meets a wall
If you own a rental within reach of Welwyn Garden City station, the flat roof over a let home is worth a look before it becomes a tenant complaint.
What to check before booking
- Whether the inside of the roof is included
- Is VAT included in the price?
- If they fly a drone, whether they hold a CAA Flyer ID and Operator ID
- What’s outside the scope of the survey
What we do, step by step
The visit has one job: to see as much of the flat roof as can safely be seen and record it clearly. Everything we note and photograph goes into the written report. The visit typically takes about 1–2 hours for most houses, and more on a big or complicated roof. Rural addresses near Lemsford can be hard to find from a postcode alone, so a few directions, or a note of a nearby landmark, help us arrive on time. The visit itself is the same as anywhere else.
- We agree the roof to be surveyed, its use and any leaks you know about.
- We look at the roof from ground level, windows and the roof where it is safe.
- The covering is checked for wear, splits, blisters and standing water.
- Upstands, outlets, edge trims and rooflights are checked and photographed.
- The report, with photographs and recommendations, comes to you by email.
Getting ready for the survey
- Have any paperwork from past roof work to hand
- Make a note of anything you’d like us to look at
- Let us know about parking near the property
Book a survey
We survey roofs seven days a week. To arrange a day that suits you, ring 07833 053749 or use the contact form.
Advice
Checking the roof from ground level
A lot can be seen from ground level. Binoculars help you spot slipped slates or tiles, gaps along the ridge and a leaning stack. Never climb onto the roof to look.
If you have a loft with safe access, take a look inside. Use a torch and stay on the joists or boards, and look for staining, damp timber or daylight coming through.
How the survey changes by roof type
GRP fibreglass
A well-laid GRP roof often lasts up to about 30 years. Cracking where boards meet or where the deck moves is a common early sign of trouble.
Felt and built-up roofs
Felt roofs frequently last around 15 to 20 years, depending on how they were laid and looked after. We record how yours is doing and where it’s weakest.
FAQs for Lemsford
Do you cover smaller places like Lemsford?
Yes, we do. We survey roofs across London and the South East, and smaller places are part of that. Longer journeys are simply planned in advance.
Do you cover Lemsford?
Yes. Our area covers London and the South East, and Lemsford is part of that. You can ring 07833 053749 or email us with the address and a few details, and we’ll talk through which survey suits.
How long have you been surveying roofs?
We’ve completed more than 5,000 surveys, across 20+ years of surveying roofs, with 98% customer satisfaction.
Can you tell me how long my flat roof will last?
A precise figure isn’t something we give, because so much depends on upkeep, exposure and workmanship. Our report describes the condition and what needs doing, and when.
Does a flat roof survey replace a RICS survey?
No. It’s a survey of the flat roof. It is not a RICS Level 2 or 3 survey of the whole building, and it isn’t a structural engineer’s report. It frequently sits alongside a buyer’s building survey.
Do I have to be there for the survey?
Not necessarily. An outside-only look can be arranged beforehand, but anything inside needs someone there to give access.
Can you find where water is getting through my flat roof?
We check the covering and every detail where leaks commonly start, and photograph anything that could be letting water in. Where the source isn’t obvious, a roof leak investigation or electronic leak detection may be the next step.