Hertfordshire · London and the South East
Allen's Green Flat Roof Survey
Flat roof surveys for homes and businesses in Allen's Green. More than 5,000 surveys completed across London and South East England.
- Leaks around rooflights
- Pools of water lying on the roof
- Blistering in felt or asphalt
What we are asked to look at in Allen's Green
People go onto flat roofs for all sorts of reasons: cleaning windows, fitting aerials or air conditioning, or clearing gutters. Each visit can damage a covering not made for regular foot traffic. New brackets and fixings through the roof are another common source of leaks.
These are some of the problems a survey can pick up:
- Pools of water lying on the roof
- Edge trims that have lifted or split
- Failed seals around rooflight kerbs
- Cracked or split membrane
Landlords with a home close to Sawbridgeworth station may find that a flat roof over a rented flat is easy to forget until the tenant reports a leak.
Before you book anyone
- Will they check the loft as well as the outside?
- How long they’ve been surveying roofs
- Which viewpoints they use to see the roof
- Whether they hold professional indemnity and public liability insurance
Flat roof surveys for homes and businesses in Allen's Green
Standing water is one of the first things we look for on a flat roof. It can point to poor falls, a blocked outlet or a deck that is deflecting. We record where water sits, check the outlets and look for dips that suggest deflection. Where the deck may be a structural issue, our report says a structural engineer should look at it. Common reasons to book are loose or cracked edge trims and a sagging deck under the covering, on mastic asphalt, single-ply membranes and felt flat roofs.
In a village or hamlet like Allen's Green, 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. If there are outbuildings or garages with flat roofs, mention them as you book.
The report works through the roof section by section, from the coverings down to the gutters. You’ll see the good as well as the bad.
- Place
- Allen's Green (CM21)
- Wider area
- Hertfordshire
- Prices
- From £150 inc. VAT
- Your report
- Written, with photos, emailed to you
- Appointments
- Monday to Sunday, daytime
- Insurance
- PI and public liability insurance
- Call
- 07833 053749
- Last updated
- 27 October 2026
Places near Allen's Green
More services for Allen's Green
How the survey works
On the day, we begin with a quick chat about the roof and anything that’s worrying you. We then inspect everything that can safely be seen, from the ground, from windows, in the loft space and by drone where applicable. The survey usually takes between one and two hours at a typical home, while a commercial roof takes nearer three to four hours. For a village or hamlet like Allen's Green, the journey is planned beforehand: let us know about narrow lanes, gates, long drives and where we can park. On the day, we inspect whatever is safely visible, inside and out.
- We start with the address and, on larger roofs, the roof area and access.
- We check the rooms or spaces under the roof for staining where there is access.
- We view the roof from safe positions and never walk on fragile surfaces.
- We record every defect with a photo and its likely cause.
- You get a report setting out the condition and our recommendations, in order of urgency.
Before we arrive
- Point out any leaks or damp patches
- Check we can get to the back of the property
- Mention any parking restrictions on your street
Booking a survey
Our phone lines are open seven days a week. For a price or to book, ring 07833 053749 or use the contact form.
Related advice
DIY checks: what’s safe
A DIY look is useful, but it isn’t a survey. You will not see flashings, valleys or the backs of chimneys properly from ground level, and those are details a survey looks at closely.
Watch the gutters in a downpour, from a window or the ground. Water spilling over the edge can point to a blockage or a sagging run.
Useful tips for Allen's Green property owners
Over many surveys, some simple habits stand out as worth the effort:
- Never stand on rooflights or fragile sheeting
- Plan a survey before the covering reaches the end of its usual life
- Limit foot traffic on the covering
- Make sure new fixings through the roof are properly sealed
Landlords, owners and managing agents can keep the report as a dated record of the roof. It helps when planning maintenance 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 to keep well clear of rooflights and fragile sheeting.
Different roofs, different checks
Rooflights and upstands
Rooflights, lanterns and upstands are where many flat roof leaks begin. We check the seals and the covering around each one.
EPDM rubber
A rubber roof can last 30 to 50 years, provided its details were done well. Those details are where we focus.
Flat and commercial roofs around Allen's Green
Slate and clay tile are the usual coverings on older South East houses, with concrete tiles on many later estates. Mixed in with those pitched roofs are plenty of flat ones, over rear extensions, dormers, garages and shops. With Much Hadham Palace about 2.2 miles north-west, Allen's Green sits in an area with a long building history. If your house is among the older ones, expect a mix of original materials and later repairs on the roof, and any change of roofing material on a listed home needs checking with the council first.
The streets around a church such as Former Church of St Anne are often 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.
Allen's Green is about 3 miles south-west of Bishop's Stortford, in Hertfordshire. Whether the building in Allen's Green is a house, a flat or a commercial unit, we can survey the roof. We cover towns and villages across Hertfordshire. For surveys nearby, see our Chelmsford page.
Postcode districts we cover here for flat roof surveys: CM21. Close by, we survey roofs in Thorley (2 miles north-east), High Wych (2 miles south), Spellbrook (2 miles east), Sawbridgeworth (2 miles south-east) and Thorley Street (2 miles north-east). Larger places within reach include Stevenage (13 miles west), Bishop's Stortford (3 miles north-east), Welwyn Garden City (13 miles west), Hoddesdon (8 miles south-west), Cheshunt (11 miles south-west) and Hatfield (15 miles west).
What’s near Allen's Green
The closest station to Allen's Green is Sawbridgeworth station, about 2.5 miles south-east. Other landmarks nearby include Herts and Essex Hospital (3.4 miles north-east) and Harlow Mill (3.2 miles south). Open spaces near Allen's Green include Thorley Wash nature reserve.
Your questions about flat roof surveys in Allen's Green
Does a conservation area affect roof work in Allen's Green?
Historic England’s list shows listed buildings, and the local council can tell you about conservation areas. 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 cover smaller places like Allen's Green?
Yes. Allen's Green is within the area we cover, which takes in towns, villages and rural addresses. Our area covers London and South East England. Just mention lanes, gates or anything else about the route as you book.
How do you inspect a flat roof?
Where it’s safe, the roof is inspected from the roof itself. If not, we use safe viewpoints and look inside, and we note any area we couldn’t see. We don’t walk on fragile rooflights or sheeting.
Will you check the loft?
If it is needed and safe to reach, yes. We look for staining, damp, daylight and signs of movement.
Do you use drones?
Where it helps and it’s safe, yes. Flights depend on the weather on the day and airspace rules, and we check for restrictions near airports before flying. We hold a CAA Flyer ID and Operator ID.
How long is the visit?
That depends on the size and shape of the roof, but most surveys take between one and two hours for most houses, with bigger or more complicated roofs taking longer. The report is sent afterwards by email.
How experienced are you?
Over 20 years and more than 5,000 surveys.
What a flat roof survey does not cover
It’s a careful look at the flat roof, not the whole story. Its limits include:
- Fragile surfaces, which we do not walk on
- A promise that the roof will not leak in future
- Hidden layers beneath the covering
If you’re not sure which survey you need, ring 07833 053749 or email us and we will give you a straight answer before booking. What our survey covers.
Roof types and parts we check
- GRP fibreglass
- Felt flat roofs
- Single-ply membranes
- Upstands and outlets
- EPDM rubber
- Mastic asphalt