Greater London · London and the South East
Flat roof survey in Northwood, Greater London
Flat roof surveys in Northwood and the rest of Greater London. We survey on any day of the week.
- Signs of deflection in the roof deck
- Failed upstands where the roof meets a wall
- Splits and cracks in the covering
Flat roof surveys around Northwood
Headstone Manor, about 3.3 miles south-east, is one of the historic houses in the wider area around Northwood. Older roofs in the wider area can hide decades of patch repairs, so the detail matters, and any change of roofing material on a listed home needs checking with the council first. In outer London, interwar semis with hipped, tiled roofs sit alongside older slate-roofed terraces. Bay roofs, hip ridges and dormers from later loft conversions are the details that set these houses apart. Mixed in with those pitched roofs are a good many flat ones, over rear extensions, dormers, garages and shops.
If you own a rental within reach of Carpenders Park station, the flat roof over a let home is worth a look before it becomes a tenant complaint. For an older house near a landmark like Emmanuel Church, the flat roofs on later extensions tend to wear out long before the main roof.
Northwood is about 3 miles south-east of Rickmansworth, in Greater London. We provide flat roof surveys for homes and businesses in Northwood and nearby. Our area takes in places right across Greater London, from the larger towns to small villages. Our London page covers surveys nearby.
We work across HA6 for flat roof surveys. We cover properties on Little Stream Close and Sandy Lodge Way. Neighbouring places we cover for flat roof surveys include Eastbury (1 mile north-east), Moor Park (1 mile north-west), Batchworth Heath (1 mile west), Batchworth (2 miles north-west) and Holywell (2 miles north). Further out, we also cover City of Westminster (14 miles south-east), Marylebone (14 miles south-east), Kensington (12 miles south-east), St Pancras (14 miles south-east), Hampstead (11 miles south-east) and Ruislip (3 miles south).
What’s near Northwood
Locally, jobs take us to homes and businesses close to King George V Playing Fields, The Gate Public House and London School of Theology. For rail, the closest station is Carpenders Park station, about 1.7 miles north-east of the centre. Well-known places in the area include Harlequin Centre (2.9 miles north-east) and Heath Robinson Museum (2.2 miles south-east). For a walk, there is Dews Farm Sand Pits and Tumbling Bay.
About our flat roof survey in Northwood
Each type of flat roof has its own weak points. Built-up felt tends to blister and crack, asphalt crazes and splits, EPDM can lift at its laps, and GRP can crack at board joints and edge trims. Single-ply PVC and TPO roofs are checked at their welds, edges and fixings. Once you know the covering and its condition, planning the next step is far easier. If you’ve noticed damaged trims at the roof edge and outlets that hold water back, we can find out what’s behind it.
On a London roof terrace or a flat roof over a back addition, water often runs under the covering before it shows. Outlets, upstands against parapet walls and joins with the main roof are frequent culprits. In a converted house in Northwood, the roof above may belong to the building rather than one flat.
After the visit, you get a report with photos, sent by email. It sets out the condition of the flat roof, any defects and our written recommendations.
- Location
- Northwood (HA6)
- Region
- Greater London
- Prices
- From £150 inc. VAT
- Reports
- Emailed report with photos and recommendations
- When we survey
- Monday to Sunday, daytime
- Cover
- PI and public liability insurance
- Telephone
- 07833 053749
- Page updated
- 27 October 2026
What affects the cost of flat roof surveys
When we price a survey, we consider:
- The height of the building and how the roof can be seen safely
- The size of the roof
- House, block, shop or office
- How complicated the roof is, with its valleys, chimneys and parapets
A Basic Survey starts from £150, including VAT. The Standard Survey starts from £250 and the Premium Survey from £400, both including VAT. We confirm the price for your survey before you book.
Getting in touch
If you can, have these to hand when you contact us:
- How the loft is reached, if there is one
- Why you want a survey: buying, a leak, a storm or new work
- Where any leaks, stains or damp patches show inside
- Dates you are working to, such as exchange
We survey roofs seven days a week. To find a date that works for you, call 07833 053749 or send us an email.
What a flat roof survey doesn’t cover
Without opening up the roof, some things stay hidden, so a survey has limits:
- What’s under the membrane without opening it up
- A promise that the roof won’t leak in future
- A structural engineer’s assessment of the deck
Not sure which survey suits your roof? You can ring 07833 053749 or send us an email and we’ll tell you. What our survey covers.
Roof types and parts we check
- GRP fibreglass
- Single-ply membranes
- EPDM rubber
- Felt flat roofs
- Upstands and outlets
- Mastic asphalt
Tips that help
You do not need to be a roofer to help. Here’s what helps most:
- Keep records of when the roof was laid and what work has been done
- Limit foot traffic on the covering
- Book a survey every few years
- Treat rooflights and old sheeting as fragile
If anything in the report isn’t clear, just ask us. The Standard Survey includes a follow-up consultation and the Premium Survey an in-person consultation, giving you a chance to go through what we found.
Book a survey every few years, and again after new fixings, units or rooflights go in. That catches changes early and builds up a record of the roof.
Questions from Northwood
Can parking be tricky for a visit in Northwood?
It can be, so it’s useful to let us know about permits, visitor bays or off-street space as you book. That way the visit can be planned around it.
Is my home in Northwood listed or in a conservation area?
The council and Historic England’s list are the places to check. Either can affect what roof work is allowed, so it is worth checking before planning any.
How long have you been surveying roofs?
Over 5,000 surveys so far, over more than 20 years, with 98% customer satisfaction.
How soon will I get the report?
Each package has its own report time. Basic is within 48 hours, Standard is 24–48 hours and Premium is the same day. If you have a deadline, such as an exchange date, let us know when you book.
How do I arrange a flat roof survey in Northwood?
To arrange a survey, call 07833 053749 or use the contact form with the address, the type of property and what’s prompted the survey. We’ll confirm the price and agree a day with you.
What does ponding on a flat roof mean?
Ponding is worth looking into. It can point to blocked outlets, poor falls or a deck that is sagging, and water that sits wears the covering sooner. We record where it sits and the likely cause.
Do you carry out surveys on Saturdays and Sundays?
Surveys run on any day of the week. To find a day that suits you, call 07833 053749 or email us.
Places near Northwood
More services for Northwood
The survey, step by step
There is not much for you to do on the day. Show us any stains, drips or problem areas you know about, and we will take it from there. A typical survey takes roughly 1–2 hours on an ordinary house, and about three to four hours for a commercial roof. London terraces rarely offer a view of the whole roof from one spot, so in Northwood we work round the house, using the street, the windows, the loft and any safe vantage point behind it. If other people live in the building, let us know who can let us into the shared parts.
- We agree the roof to be surveyed, its use and any leaks you know about.
- The roof is viewed from safe positions, including the roof itself where that’s safe.
- The covering is checked for wear, splits, blisters and standing water.
- We photograph and record the outlets, upstands, trims and rooflights.
- The report, with photos and recommendations, comes to you by email.
Before the survey
- If you are buying, let the agent know when we’re coming
- Keep pets in another room
- Tell us where we can park nearby
Booking a survey
When you are ready to go ahead, call 07833 053749 or use the contact form. We will suggest a package, agree the price and find a date.
Advice
Roof by roof
GRP fibreglass
GRP roofs can last up to about 30 years when they’re laid well. Hairline cracks over board joints are an early warning we look out for.
Single-ply membranes
Single-ply relies on its welded laps staying sound. Seams, corners and the details around outlets and upstands get a careful look.
Common roof problems in Northwood
Flat roofs take the full force of the weather on a surface that drains slowly. Over the years, coverings harden, crack and start to come away at the edges. Most people book a survey after a leak, before buying, or when they think the roof is getting old.
These are some of the problems a survey can pick up:
- Outlets choked with leaves and silt
- Signs of deflection in the roof deck
- Failed seals around rooflight kerbs
- Gaps at upstands and abutments
For a London address like Northwood, it helps to know about controlled parking before the day.
What to check before booking
- Whether the inside of the roof is included
- How much experience they have with roofs like yours
- How long the report takes to arrive
- Whether VAT is in the quoted price