Hertfordshire · London and the South East
Flat Roof Survey in London Colney
Surveys of flat roofs on homes, extensions and commercial buildings for London Colney, from an experienced roof surveyor. Every survey comes with a written report and photos.
- Failed seals around rooflight kerbs
- Blocked or damaged outlets
- Loose or cracked edge trims
Practical tips
These tips come from what we see on roofs every week:
- Never stand on rooflights or fragile sheeting
- Note any new marks on ceilings beneath the roof
- Keep records of when the roof was laid and what work has been done
- Check from a window for ponding after heavy rain
If you are buying, the report gives you something specific to take back to the seller or agent. You might ask for work to be done before completion, or discuss the price, depending on what we found.
Get splits, lifted seams and loose trims seen to while they’re small. A flat roof that’s looked after between surveys usually lasts longer.
About our flat roof survey in London Colney
A flat roof does not shed water the way a pitched roof does. Water lies on the surface for longer, so a small split or a blocked outlet can soon lead to a leak. The surface, the falls, the upstands and the trims are all looked at closely, and we look for signs that water has reached the deck. That way, defects are found before they reach the room below. We survey felt flat roofs, EPDM rubber and GRP fibreglass, and common reasons people get in touch are edge trims that have lifted or split and outlets choked with leaves and silt.
Around London Colney, many homes have a garden room, garage or outbuilding with a flat roof. They’re easy to forget, but water through a garage roof can spoil whatever is stored inside. It’s worth mentioning them as you book, so the visit can include them. Smaller roofs use the same coverings as bigger ones, from felt to rubber and GRP, and age in the same way.
Every survey ends with a written report, with photographs, emailed to you. It sets out the condition of the flat roof, any defects and our written recommendations.
- Location
- London Colney (AL2, AL1)
- Region
- Hertfordshire
- Prices
- From £150 inc. VAT
- Your report
- Written, with photos, emailed to you
- Survey days
- Weekdays, Saturdays and Sundays
- Cover
- PI and public liability insurance
- Call
- 07833 053749
- Last updated
- 27 October 2026
Signs you need a flat roof survey in London Colney
Flat roofs often get walked on for other jobs: to clean windows, fit aerials or air conditioning units, or reach a gutter. A covering that wasn’t designed for foot traffic can crack or puncture. Fixings added through the covering often start leaks too.
Signs worth acting on include:
- Water getting in at rooflights
- Ponding water that does not drain away
- Cracked or split membrane
- Gaps at upstands and abutments
If you own a rental within reach of Park Street station, a flat roof over a rented flat is easy to forget until the tenant reports a leak.
Questions to ask before booking
- What the survey will not cover
- What experience they bring
- Whether the inside of the roof is included
- Their drone registration, if they fly one
Flat and commercial roofs around London Colney
With Batchwood Hall about 3.9 miles north-west, London Colney sits in an area with a long building history. On older houses around here, roofs often carry the marks of earlier repairs, from replaced slates to new lead. Older houses in the South East often have slate or clay tile roofs, while many later estates have concrete tiles, and flat-roofed additions turn up almost everywhere. Mixed in with those pitched roofs are a good many flat ones, over rear extensions, dormers, garages and shops.
If you live in an older home near Church of St Peter, later flat-roofed additions are common on older houses, and their edges and upstands frequently show the first signs of wear. If you look after a shop, office or commercial unit, for instance near The Maltings, flat roofs over shops and units are easy to forget until water comes through a ceiling.
London Colney is about 2 miles south-east of St Albans, in Hertfordshire. We visit London Colney as part of our work across Hertfordshire. Our Hertfordshire coverage includes London Colney and the places around it. London is in our area too.
Surveys in AL2 and AL1 work the same way as everywhere else we cover. That includes homes and businesses on High Street, London Road and Haseldine Road and the roads around them. Close by, we survey roofs in Broad Colney (1 mile south), Tyttenhanger (1 mile north), Shenleybury (1 mile south), Sleapshyde (2 miles north-east) and Colney Heath (2 miles north-east). We also work in nearby towns such as Watford (6 miles south-west), Hemel Hempstead (7 miles west), Stevenage (14 miles north), Welwyn Garden City (7 miles north-east), Harpenden (7 miles north) and Hoddesdon (12 miles east).
Local landmarks in London Colney
Locally, jobs take us to homes and businesses close to White Horse pub, Highfield Park and Samuel Ryder Academy, among other places. For rail, the closest station is Park Street station, about 1.9 miles west. Other landmarks nearby include Napsbury Hospital (0.5 miles west) and St Albans Musical Museum (2.6 miles north-west). Not far away are Verulamium Lake and Broad Colney Lakes.
What happens on the day
We will ask a few questions first, like when any problem began and what work has been done before. Then the inspection itself takes between one and two hours for an extension, garage or dormer roof, and around 3–4 hours for a commercial flat roof. Parking around London Colney is normally easier than in a town centre, but mention lanes, gates or long drives. Low roofs on bungalows can frequently be seen well from ground level, and the loft shows the rest, while taller roofs may need other vantage points or the drone where applicable.
- We start with the address and, on larger roofs, the roof area and access.
- Inside, we look for signs of water under the roof where we can reach.
- 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.
How to prepare
- Check the loft hatch can be reached
- Point out any leaks or damp patches
- Jot down any questions you want answered
Getting a price
For a price for flat roof surveys in London Colney, phone 07833 053749 or email us. Some details about the property and the roof help us give you an accurate price.
Related advice
What a flat roof survey does not cover
No survey can tell you everything, and we’d rather be clear about that before you book. Keep these in mind:
- What’s under the membrane without opening it up
- Fragile surfaces, which we do not walk on
- A fixed date for when the roof will need replacing
If in doubt, call 07833 053749 or email us and we’ll point you to the right survey. What our survey covers.
What we check
- Felt flat roofs
- Upstands and outlets
- EPDM rubber
- GRP fibreglass
- Single-ply membranes
- Mastic asphalt
Why get it checked now?
Flat roofs cannot typically be seen from the street, so they’re often overlooked. Owners often learn the roof is at the end of its life only when it leaks. Regular surveys mean it won’t come as a surprise. Homes in smaller places like London Colney can face more weather, so a loose ridge or verge soon lets rain in. Wind gets under it and lifts more.
Simple, low roofs take less time to survey than tall or complicated ones, and the package you pick makes a difference too. The price is always agreed first.
Why book us in London Colney
- A sub-250g drone, flown with a CAA Flyer ID and Operator ID
- Professional indemnity and public liability insurance
- Thermal imaging and drones used where they help
- 98% of customers satisfied
Take a look at our cost guide and our case studies.
Places near London Colney
Other services in London Colney
What we look for on each type of roof
Single-ply membranes
Single-ply PVC and TPO membranes are common on commercial roofs and newer buildings. The survey looks at welded seams, edges, fixings and signs of damage.
Mastic asphalt
Older asphalt can become brittle and crack as the roof moves. The report shows where it’s cracking and how far it seems to extend.
Common questions in London Colney
Is my home in London Colney listed or in a conservation area?
Your council is the best source, with Historic England’s list for listed buildings. Both listing and conservation areas can limit changes of roofing material, and councils can also use Article 4 directions.
Do you carry out roof surveys in London Colney?
We do. The survey and report are the same in London Colney as anywhere else, and visits run on weekdays and weekends.
Do you look for flat roof leaks?
Our survey looks across the whole roof, not only above the stain. Splits, open laps, upstands, outlets and rooflights are all checked. If the cause can’t be seen, we’ll say so and suggest what would help.
How do you inspect a flat roof?
We inspect from wherever is safe: on the roof where it’s safe, and from windows, nearby vantage points and inside. We never walk on fragile rooflights or sheeting.
What if it rains on the day?
It can, depending on the survey. Drone flights need calm, dry weather, and thermal imaging works best after a sunny day, with a dry roof and little wind. If the conditions are not right, we’ll talk to you about another date.
Do you survey commercial flat roofs?
Yes. Offices, units, shops and blocks of flats are all part of our work. We quote bigger roofs on their size and how they’re reached, so call 07833 053749 or email us with the address.
Which days do you carry out surveys?
We survey on any day from Monday to Sunday, during the day. Let us know your preferred days when you book.