Greater London · London and the South East
Flat roof survey in Northwick Park, Greater London
Flat roof surveys in Northwick Park and the rest of Greater London. Surveys run seven days a week.
- A sagging deck under the covering
- Upstands pulling away from walls
- Raised blisters across the surface
Signs you need a flat roof survey in Northwick Park
Ponding keeps the covering wet and wears it faster. Blocked outlets, poor falls and a sagging deck are the usual causes. Where trees are close by, leaves and silt can block an outlet within a single autumn.
Here are some of the things we see often:
- Loose or cracked edge trims
- Cracked or split membrane
- Water getting in at rooflights
- Dips that suggest the deck is deflecting
Northwick Park is in London, so parking needs planning: let us know about parking bays, permits or a driveway as you book.
Before booking any roof surveyor
- What happens after the report arrives
- How long the report takes to arrive
- How they’ll see the roof: from ground level, the loft, the roof or by drone
- How much experience they have with roofs like yours
How a flat roof survey works in Northwick Park
Standing water is one of the first things we look for on a flat roof. It can mean the falls were never right, an outlet is blocked or the deck has started to sag. The survey notes any ponding, the state of each outlet and any dips that hint at a sagging deck. If the deck itself looks like a structural concern, we’ll recommend a structural engineer. We survey upstands and outlets, EPDM rubber and mastic asphalt, and common reasons people get in touch are leaks around rooflights and standing water left after rain.
Commercial and residential blocks across London often have big flat roofs with plant, rooflights and access walkways. Every penetration and upstand is a place where a membrane can fail. For a building in Northwick Park, access is agreed with whoever manages the roof ahead of the visit. Rooflights, plant supports and pipe entries are common places for a membrane to fail.
It isn’t only a list of defects. For each finding, it explains what it is, why it matters and what we’d recommend, so you can decide what to do next.
- Location
- Northwick Park (HA1, HA3, HA0)
- Wider area
- Greater London
- Prices
- From £150 inc. VAT
- Reports
- Written, with photos, emailed to you
- Survey days
- Weekdays, Saturdays and Sundays
- Insured
- PI and public liability insurance
- Call
- 07833 053749
- Last updated
- 27 October 2026
Leave it or get it looked at?
For a buyer, the best time to learn about a flat roof is before contracts are exchanged. After that, the cost of any work is yours. Our report gives you specific points to raise with the seller or agent. In a London terrace or conversion, a roof defect rarely stays your problem alone: a blocked parapet gutter or slipped slate can let water into the flat below or the house next door. Finding it early keeps the work smaller.
There are three survey packages: Basic from £150, Standard from £250 and Premium from £400, all inc. VAT. What your roof costs depends on its size, access and what you want to find out.
Why book with us
- Covered by professional indemnity and public liability insurance
- A sub-250g drone, flown with a CAA Flyer ID and Operator ID
- Package prices that include VAT
- 98% customer satisfaction
Take a look at how roof surveys are priced or two real surveys.
Honest limits
To be straight with you, there are limits to any roof survey:
- The condition of the deck or insulation hidden under the covering
- A promise that the roof will not leak in future
- Structural calculations, which need a structural engineer
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 before booking. What a survey covers and doesn’t.
Roof types and parts we check
- Upstands and outlets
- Felt flat roofs
- EPDM rubber
- Mastic asphalt
- GRP fibreglass
- Single-ply membranes
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. Every upstand and edge is looked at, with photos of any that have lifted or cracked.
Rooflights and upstands
Rooflights and fragile sheets are never walked on. They’re inspected from safe positions and recorded with photographs.
What affects the cost of flat roof surveys
Several things affect the price of a survey:
- The roof’s overall size
- The use of thermal imaging or a drone
- How many separate roofs there are, such as extensions, dormers and garages
- Commercial roofs and larger buildings
The cost of a survey depends on the roof: its size, its height, how many sections it has and how it can be reached and seen safely. Flat roof survey starts from £150, including VAT.
Helping us price your survey
If you can, have these to hand when you get in touch:
- Your postcode, so we can check access and travel
- What made you get in touch
- Dates you are working to, like exchange
- Photos of the roof, taken safely from the ground or a window
We confirm the price for your survey before booking, so you know the cost up front. Flat roof survey starts from £150, including VAT. To book, call 07833 053749 or send us an email.
What happens on the day
We’ll ask a few questions first, about the roof’s history, any leaks and past repairs. The inspection then takes an hour or two at most homes, with bigger or more complicated roofs taking longer. In converted houses and mansion blocks, the loft hatch is often on a shared landing. If that applies to your building, it is useful to agree access with the neighbours or the managing agent first. Otherwise, the visit in Northwick Park runs like any other.
- 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.
- 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.
Getting ready for the survey
- Keep pets in another room
- Move anything stored under the loft hatch
- Jot down any questions you want answered
Booking a survey
You can call us seven days a week. For a price or to book, phone 07833 053749 or send us an email.
Read more
Flat roofs in Northwick Park
In outer London, interwar semis with hipped, tiled roofs sit alongside older slate-roofed terraces. If your home in Northwick Park is one of them, bay roofs, hips and later dormers each have their own details. Next to the main roofs there’s typically a flat roof somewhere, whether on an extension, a garage or a commercial unit. The wider area around Northwick Park has a long history of building, with Headstone Manor about 1.9 miles north-west. On older houses around here, roofs often carry the marks of earlier repairs, from replaced slates to new lead.
Landlords with a home close to Kenton station may find that flat roofs over rear additions and dormers in rented property are worth checking between tenancies. For site and facilities teams at buildings such as Harrow High School, a large flat roof with a good many outlets and rooflights has many places where a membrane can fail.
Northwick Park is about 1 mile south-west of Kenton, in Greater London. Surveys in Northwick Park work the same way as everywhere we cover: a careful look at what can safely be seen, photographs and a clear written report. Our area takes in places right across Greater London, from the larger towns to small villages. We also survey roofs in London.
We survey roofs across the HA1, HA3 and HA0 postcode area for flat roof surveys and the streets around it. Local streets include Lyon Road, Manor Road and Gayton Road, all of which we cover. Being close to the A404, Northwick Park is simple for us to get to for flat roof surveys. Other places close to Northwick Park include Greenhill (1 mile north-west), Harrow on the Hill (1 mile south-west), South Kenton (1 mile east), Kenton (1 mile north-east) and Harrow (1 mile west). Further out, we also cover London (11 miles south-east), City of Westminster (9 miles south-east), Marylebone (9 miles south-east), Kensington (7 miles south-east), St Pancras (10 miles east) and Shoreditch (11 miles east).
Local landmarks in Northwick Park
Typical jobs here are in homes near St Anselm's Catholic Primary School, Orley Farm School and Preston Park and the streets around them. For rail, the closest station is Kenton station, roughly 0.6 miles north-east. Other landmarks nearby include Northwick Park Hospital (less than half a mile north-east) and Kodak Museum (1.5 miles north-west). Open spaces near Northwick Park include Masons Field and Northala Fields.
Places near Northwick Park
What else we do in Northwick Park
Northwick Park: your questions answered
Is my home in Northwick Park 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.
Is parking a problem for a survey in Northwick Park?
Parking in Northwick Park, as in most of London, takes a little planning: a visitor permit or a bay close to the door helps a lot.
Do you carry professional indemnity insurance?
Professional indemnity and public liability insurance cover our surveys. Ask if you need details for a managing agent or building owner.
Will you walk on the flat roof?
Where it’s safe, the roof is inspected from the roof itself. Otherwise we use windows, vantage points and the spaces below, and the report says if any part couldn’t be seen. Fragile surfaces are never walked on.
How experienced are you?
We have more than 20 years’ experience and have carried out more than 5,000 surveys across London and the South East.
What if it rains on the day?
Light rain is normally fine; heavy rain and wind are different. In high wind or heavy rain, a drone cannot fly and access may not be safe, and we’d agree another day.
What does a roof survey cost?
Prices start from £150, including VAT. The final figure depends on the roof and the package you choose.