Hertfordshire · London and the South East
Flat Roof Survey in Harmer Green
Surveys of flat roofs on homes, extensions and commercial buildings around Harmer Green, with a written report you can act on. Book a weekday or weekend visit.
- Water getting in at rooflights
- Cracked or split membrane
- Loose or cracked edge trims
What a flat roof survey looks like in Harmer Green
With Digswell House about 1.5 miles south-west, Harmer Green sits in an area with a long building history. If your home is one of the older ones, expect a mix of original materials and later repairs on the roof, 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. Flat roofs fill the gaps in between, on extensions, garages, dormers and business premises.
Take a building like Oaklands Primary School: ponding and blocked outlets on a wide flat roof are worth catching before the next wet season. If you own a rental within reach of Welwyn North station, a flat roof over a rented flat is easy to forget until the tenant reports a leak. If you live in an older home near Digswell Village Church, the flat roofs on later extensions tend to wear out long before the main roof.
Harmer Green is about 2 miles north of Welwyn Garden City, in Hertfordshire. Bookings from Harmer Green are handled just like any other: get in touch, agree the price and pick a day. Our Hertfordshire coverage includes Harmer Green. London is in our area too.
Flat roof surveys in AL6 work the same way as everywhere else we cover. Neighbouring places we cover for flat roof surveys include Burnham Green (1 mile east), Tewin Wood (1 mile east), Oaklands (1 mile north-west), Bull's Green (1 mile north-east) and Digswell (1 mile south-west). Within a short drive, we also cover Watford (15 miles south-west), Hemel Hempstead (13 miles south-west), Stevenage (5 miles north), St Albans (8 miles south-west), Bishop's Stortford (15 miles east) and Harpenden (7 miles west).
Landmarks near Harmer Green
In Harmer Green, that means homes and buildings near Danesbury Park, Monk's Walk School and The White Horse Public House and the streets around them. For rail, the closest station is Welwyn North station, about 0.8 miles south-west. Nearby you’ll also find Hertford Castle (4.9 miles south-east) and Queen Elizabeth II Hospital (3.4 miles south). Open spaces near Harmer Green include Tewin Orchard and Hopkyns Wood.
How a flat roof survey works in Harmer Green
Each flat roof is looked at from the safest viewpoints we have: from the roof itself where that is safe, from windows and nearby vantage points, and from inside where there’s access. Fragile rooflights and fragile sheets are never walked on. Where any area cannot be viewed safely, we say so in the report, so the limits of the survey are clear. If you’ve noticed cracked or split membrane and leaks around rooflights, a survey will tell you what’s going on, whatever the roof.
Older buildings in small places like Harmer Green may be listed or in a conservation area, and that can affect how an extension roof or dormer is re-covered. If you are planning work, check with the council first. Finding out what state the roof is in gives you the facts to plan with. Changes that affect a listed building’s special interest need listed building consent.
You receive the findings by email, ready to forward to whoever needs them. Turnaround is within 48 hours for Basic, 24–48 hours for Standard and same day for Premium.
- Location
- Harmer Green (AL6)
- Region
- Hertfordshire
- Price
- From £150 inc. VAT
- Reports
- A written report with photos, by email
- Survey days
- Weekdays, Saturdays and Sundays
- Cover
- Professional indemnity and public liability
- Call
- 07833 053749
- Page updated
- 27 October 2026
What a survey costs
Survey packages start from £150, with VAT included. The price for your roof depends on:
- Whether it’s a home or a commercial building
- How many separate roofs there are, such as extensions, dormers and garages
- The roof’s overall size
- How complicated the roof is, with its valleys, chimneys and parapets
Thermal imaging and drone inspection (where applicable) come with the Premium Survey, which starts from £400, with VAT included. We’ll tell you which package suits the questions you have.
What to let us know when you get in touch
To price your survey accurately, we will ask about:
- The type of building and roof, such as pitched or flat
- Access details, such as a loft hatch or a shared roof
- When you need the report by
- Where water is showing inside, if it is
For a price for flat roof surveys in Harmer Green, call 07833 053749 or email us. The address, the type of property and what you need to know help us give you an accurate price.
FAQs for Harmer Green
How do I find out if my home in Harmer Green is listed?
For listing, use Historic England’s list; for conservation areas, ask the council. It matters most if you are planning to re-roof in a different material.
Do you carry out roof surveys in Harmer Green?
Yes, Harmer Green is within the area we cover. We work right across London and the South East. Just call 07833 053749 or send us an email and let us know about the property.
Do you survey 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 booking.
Do you look for flat roof leaks?
The survey covers the covering and all the details where leaks typically begin, recording anything that could let water through. Where the source is not obvious, a roof leak investigation or electronic leak detection may be the next step.
What if it rains on the day?
It can, depending on the survey. Drone flights need calm, dry weather, and thermal imaging works best with a dry roof, little wind and a sunny day beforehand. We’ll rearrange with you if the weather isn’t right.
Does the report include photographs?
Yes. We photograph the roof as we go, and the report uses them to show each finding.
Will this cover the whole house?
No. It is a closer look at the flat roof, not a survey of the whole property. It complements a RICS home survey rather than replacing it, and it isn’t a structural engineer’s report.
Tips that help
A few practical points come up again and again on our surveys. They apply to most roofs:
- Keep outlets clear of leaves and moss
- Keep people off the roof unless they need to be there
- Check new fixings through the roof are properly sealed
- Treat rooflights and old sheeting as fragile
You get the report by email and can pass it to a roofer, your solicitor, the seller or your managing agent. It’s written in plain English, with a photograph of each defect, so others can follow it without going up to look.
After heavy rain, look at the roof from an upstairs window if you can. If water is still there a day or two later, have it checked.
Leave it or get it looked at?
Flat roofs cannot usually be seen from the street, so they’re often overlooked. Owners frequently learn the roof is at the end of its life only when it leaks. Regular surveys mean it won’t come as a surprise. Matching old materials, such as handmade tiles or stone slates, can take time to source. That is one more reason to find defects before they become urgent.
The cost of a survey depends on the roof: how big it is, how high it is, the number of separate roofs and how it can be reached and seen safely. Our price is from £150, including VAT.
Why us?
- Drones and thermal imaging where applicable
- Over 5,000 surveys carried out
- Every finding written up with photos
- Two decades and more of roof surveys
Nearby places to Harmer Green
Other services in Harmer Green
How it works
Every roof is different; as a rough guide, the survey takes between one and two hours for an extension, garage or dormer roof, and around 3–4 hours for a commercial flat roof. You’re welcome to ask questions while we are there. Somewhere like Harmer Green needs a little journey planning: let us know about narrow lanes, gates, long drives and where we can park. The roof is looked at from the ground, from windows, from the loft where there’s safe access and from the roof where it’s safe.
- First we go through the roof, what’s beneath it and any problems so far.
- We look at the roof from the ground, windows and the roof where it is safe.
- We check the covering for splits, blisters, ponding and wear.
- Upstands, outlets, edge trims and rooflights are checked and photographed.
- A written report with photos and recommendations is emailed to you.
Before we arrive
- Make sure pets are kept safely away
- If you are buying, check with the agent that we can get in
- Leave side gates unlocked
Booking a survey
Getting a price is simple: just call 07833 053749 or email us, let us know about the property and we’ll suggest the right survey. The price is agreed up front.
Read more
What we look for on each type of roof
Rooflights and upstands
Rooflights, lanterns and upstands are where many flat roof leaks begin. We look at how the covering is finished around each rooflight and upstand.
Mastic asphalt
Without seams, asphalt tends to fail through cracking and at its skirtings. We record any crazing or splits and where water may be getting in.
What a flat roof survey does not cover
Our survey is not a RICS Level 2 or Level 3 survey, a structural engineer’s report or an asbestos survey. Other limits to bear in mind:
- Structural calculations, which need a structural engineer
- Whether old sheeting or boards contain asbestos
- A promise that the roof will not leak in future
If you are not sure which survey you need, call 07833 053749 or email us and we will give you a straight answer. What our survey covers.
Roofs we survey in Harmer Green
- Mastic asphalt
- GRP fibreglass
- Single-ply membranes
- Upstands and outlets
- Felt flat roofs
- EPDM rubber