Hertfordshire · London and the South East
North Mymms Flat Roof Survey
Surveys of flat roofs on homes, extensions and commercial buildings across North Mymms, using drones and thermal imaging where it applies. Call or email for a price.
- Upstands pulling away from walls
- Leaks around rooflights
- Damaged trims at the roof edge
Checking the roof from ground level
The one thing to avoid is getting up close. Slates, tiles, flat roofs and rooflights can give way, and falls from height are serious. That part is for a survey.
Watch the gutters in a downpour, from a window or the ground. Overflowing water can point to a blockage or a sagging run.
About our flat roof survey in North Mymms
Water through a flat roof does not always come in where the stain is. It can run along the deck from a split, an open lap or a failed upstand some distance away. That’s why we check every detail across the roof, not only the area above the stain, and photograph anything that could let water in. A roofer can then start from a clear picture of the problem. We’re frequently asked to look into leaks around rooflights and outlets choked with leaves and silt, across mastic asphalt, upstands and outlets and GRP fibreglass.
Some older homes in villages like North Mymms are listed or in a conservation area, and that can affect how an extension roof or dormer is re-covered. Check with the council before planning any change of material. Finding out what state the roof is in gives you the facts to plan with. Listed building consent is needed for changes that affect a listed building’s special interest.
We keep jargon out of it: if work is needed, the report says so clearly.
- Location
- North Mymms (AL9)
- Region
- Hertfordshire
- Cost
- From £150 inc. VAT
- Your report
- Emailed report with photos and recommendations
- When we survey
- Monday to Sunday, daytime
- Cover
- Professional indemnity and public liability
- Phone
- 07833 053749
- Updated
- 27 October 2026
Places near North Mymms
Other services in North Mymms
Why act early in North Mymms
A small split in a flat roof is typically a modest job when it is found early. Left alone, water can soak the insulation and the deck, and the job grows. A survey now shows which you’re dealing with. For an older or listed building in a place like North Mymms, repairs may need matching materials and consent, so a defect found early gives time to plan the work properly.
What a survey costs comes down to the roof itself: how big it is, how high it is, the number of separate roofs and how it can be reached and seen safely. Prices start from £150, including VAT.
Why us?
- Satisfaction rate of 98%
- Over 5,000 surveys carried out
- More than 20 years surveying roofs
- An independent look at the roof
Take a look at what a roof survey costs and what we found on two real jobs.
What we look for on each type of roof
Felt and built-up roofs
On felt, the upstands and edge details often fail before the main surface. We check each one and photograph any that have split or pulled away.
Rooflights and upstands
Rooflights, lanterns and upstands are where many flat roof leaks begin. We check how the covering is finished around each rooflight and upstand.
How the survey works
You don’t need to do much on the day. Point out anything you’ve noticed, like stains, drips or loose pieces, and we’ll take it from there. The survey itself takes roughly 1–2 hours for an extension, garage or dormer roof, and around 3–4 hours for a commercial flat roof. Older rural homes like those around North Mymms can have a main roof, lower lean-to roofs and outbuildings all joined together. Each part is looked at from wherever it can be seen safely.
- 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’s safe.
- We check the covering for splits, blisters, ponding and wear.
- We photograph and record the outlets, upstands, trims and rooflights.
- A written report with photos and recommendations is emailed to you.
Before we arrive
- Note where any stains or damp appear
- Make sure pets are kept safely away
- Leave side gates unlocked
Book a survey
If you’re buying, it’s useful to book soon after your offer is accepted, so there is time to use the report before exchange. Otherwise, simply ring 07833 053749 or use the contact form whenever suits you.
Related advice
What this survey can’t tell you
Some things cannot be seen without opening up the roof, so a survey has limits:
- The condition of the deck or insulation hidden under the covering
- A fixed date for when the roof will need replacing
- Parts of the roof that are not safe to walk on or view
If you are not sure which survey you need, call 07833 053749 or use the contact form and we’ll give you a straight answer. What a survey covers and doesn’t.
What this survey covers
- EPDM rubber
- GRP fibreglass
- Mastic asphalt
- Single-ply membranes
- Felt flat roofs
- Upstands and outlets
Flat roof surveys around North Mymms
The wider area around North Mymms has a long history of building, with Wyllyotts Manor about 2 miles south-east. Period homes nearby can have lead valleys, tall chimneys and a patchwork of past repairs. 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.
For landlords with property near Brookmans Park station, flat roofs over rear additions and dormers in rented property are worth checking between tenancies. If you live in an older home near Church of St Mary the Virgin, the flat roofs on later extensions tend to wear out long before the main roof. Take a building like Brookmans Park Primary School: schools and public buildings frequently have big flat roofs, and their outlets and upstands need regular checks.
North Mymms is about 2 miles north-west of Potters Bar, in Hertfordshire. Wherever you are in North Mymms, we can come and survey your property. North Mymms is one of the places in Hertfordshire where we work for flat roof surveys. You can also see our page for London.
We cover every part of the AL9 postcode area for flat roof surveys and the streets around it. If you need a flat roof survey at a property on St Mary's Church Road, Abdale Lane and Warrengate Road or a nearby road, we can help. If you are just outside North Mymms, we cover Welham Green (1 mile north), Colney Heath (2 miles north-west), Sleapshyde (3 miles north-west), Hatfield (3 miles north) and Shenleybury (3 miles west). We also work in nearby towns like Watford (9 miles south-west), Hemel Hempstead (11 miles west), Stevenage (13 miles north), St Albans (5 miles north-west), Welwyn Garden City (6 miles north) and Harpenden (9 miles north-west).
Near you in North Mymms
Typical jobs here are in homes near Chancellor's School, North Mimms Park and The Old Maypole Public House. The closest station to North Mymms is Brookmans Park station, roughly 0.7 miles east. Well-known places in the area include Shenley Hospital (3.5 miles south-west) and Potters Bar Museum (2 miles south-east). For a walk, there is Furzefield Wood and Lower Halfpenny.
Before and after the survey
Some practical points come up on survey after survey. They’re worth knowing whatever the roof:
- Limit foot traffic on the covering
- Check ceilings under the roof for damp patches
- Note the date and type of any roof work
- Keep clear of rooflights and fragile roof sheets
Many people send the report to two or three roofers for quotes. Because everyone is pricing the same findings, the quotes are easier to compare. It’s your choice who carries out the work and when.
Have the roof surveyed every few years, and after any work that goes through it. That catches changes early and builds up a record of the roof.
North Mymms questions
Does a conservation area affect roof work in North Mymms?
For listing, use Historic England’s list; for conservation areas, ask the council. The answer matters most when a change of material is on the cards.
Is North Mymms within the area you cover?
Yes, we do. We survey roofs across London and South East England, and smaller places are part of that. The journey is planned ahead, so it is useful to know about access.
Are you structural engineers?
No. Our survey isn’t a structural engineer’s report, and it does not include calculations. If we see signs that need an engineer’s opinion, we will recommend one.
How do I book a survey in North Mymms?
To book, ring 07833 053749 or drop us an email and let us know the address and what you’d like to know. We’ll confirm the price and agree a day with you.
Can you survey at the weekend?
We survey seven days a week: weekdays, Saturdays and Sundays. Tell us which days suit you when you book.
Will you check the loft?
If it’s needed and safe to reach, yes. We look for staining, damp, daylight and signs of movement, as far as the space allows.
Is a flat roof survey the same as a building survey?
No. It is a closer look at the flat roof, not a survey of the whole property. It works alongside a RICS home survey, not instead of one, and it isn’t a structural engineer’s report.