Greater London · London and the South East
Flat Roof Survey in Harrow on the Hill
A careful look at the flat roof at your property in Harrow on the Hill, with photos and a written report.
- Blisters and bubbles in the covering
- Pools of water lying on the roof
- Outlets choked with leaves and silt
Flat roof surveys for homes and businesses in Harrow on the Hill
A flat roof leak often travels before it shows on the ceiling. It can run along the deck from a split, an open lap or a failed upstand some distance away. Our survey covers the whole roof, not just the part above the mark, with photographs of anything that could be letting water in. Whoever carries out the work then has a clear starting point. We’re often asked to look into loose or cracked edge trims and water getting in at rooflights, across GRP fibreglass, upstands and outlets and single-ply membranes.
London has a lot of flat roofs: rear additions, dormers, roof terraces and the roofs of blocks and offices. Coverings range from felt and asphalt to EPDM rubber, GRP fibreglass and single-ply membranes, and each fails in its own way. Which one is on a roof in Harrow on the Hill shapes how it is checked. Many older flat roofs are felt or asphalt, and many newer ones EPDM rubber or GRP.
The written findings come by email, ready to forward to whoever needs them. Turnaround is within 48 hours for Basic, 24–48 hours for Standard and same day for Premium.
- Where
- Harrow on the Hill (HA1, HA0, HA2)
- Wider area
- Greater London
- Cost
- From £150 inc. VAT
- Your report
- A written report with photos, by email
- Appointments
- Weekdays, Saturdays and Sundays
- Cover
- Professional indemnity and public liability
- Phone
- 07833 053749
- Page updated
- 27 October 2026
Common questions in Harrow on the Hill
Does a conservation area affect roof work in Harrow on the Hill?
Your council is the best source, with Historic England’s list for listed buildings. A change of roofing material may need consent in either case.
Can parking be tricky for a visit in Harrow on the Hill?
Sometimes, yes. If Harrow on the Hill has controlled parking where you are, a visitor permit is the easiest answer.
What does the report include?
It explains what we saw, what it means and what we’d suggest, with photographs throughout. It also says if any part of the roof couldn’t be seen safely.
What do I do with the report?
The report arrives by email. With Standard there is a follow-up consultation; with Premium, an in-person consultation, so you can talk the findings through.
Are you insured?
Our cover is professional indemnity plus public liability, and we can provide details if a managing agent needs them.
Can you give me structural calculations?
No. Visible signs such as deflection or sagging are recorded, but calculations and an engineer’s opinion are outside what we do. If one is needed, the report says so.
Can you survey a shared roof?
Yes. A shared roof needs access agreed first, with whoever owns or manages the building. Tell us about it when booking and we’ll plan the survey around it.
Practical tips
A survey works best with a little help from you, before and after. Tips:
- Have the roof looked at again after a severe storm
- Check the outlets after the leaves fall
- Keep clear of rooflights and fragile roof sheets
- Watch the ceilings below the flat roof for stains
You get the report by email and can pass it to a roofer, your solicitor, the seller or your managing agent. Each defect is described in plain words and shown in a photo, so others can follow it without going up to look.
Have the roof surveyed every few years, and after any work that goes through it. You will spot changes early and have a record to look back on.
Nearby places to Harrow on the Hill
More services for Harrow on the Hill
Local flat roofs in Harrow on the Hill
Further from the centre, London’s housing takes in interwar semis with hipped roofs in clay or concrete tiles as well as slate-roofed terraces. On a semi of that age, the small roofs over the bays, the hip tiles and any later dormer each need their own look. Flat roofs fill the gaps in between, on extensions, garages, dormers and business premises. The wider area around Harrow on the Hill has a long history of building, with Northolt Manor about 2.1 miles south-west. Period homes nearby can have lead valleys, tall chimneys and a patchwork of past repairs, and any change of roofing material on a listed home needs checking with the council first.
If you let a flat or house near Sudbury Hill Harrow station, a flat roof over a rented flat is easy to forget until the tenant reports a leak. The streets around a church such as Christ Church are often among the oldest in a place, and if your house is among the older ones nearby, the flat roofs on later extensions tend to wear out long before the main roof. Harrow on the Hill is in London, so parking needs planning: let us know about parking bays, permits or a driveway when you book, as a space near the door cannot be promised.
Harrow on the Hill is about 1 mile south-east of Harrow, in Greater London. We provide flat roof surveys for homes and businesses in Harrow on the Hill and nearby. Harrow on the Hill is one of the towns and villages in Greater London we cover. You can also see our page for London.
We survey roofs across the HA1, HA0 and HA2 postcode area for flat roof surveys. Whether your property is on New Road, Amery Road and London Road or anywhere close by, we can survey it. Close by, we survey roofs in Roxeth (1 mile west), Northwick Park (1 mile north-east), South Harrow (1 mile west), Harrow (1 mile north-west) and Sudbury (1 mile south-east). We also work in nearby towns like London (11 miles south-east), City of Westminster (9 miles south-east), Marylebone (9 miles east), Kensington (7 miles south-east), St Pancras (10 miles east) and Shoreditch (11 miles east).
Landmarks near Harrow on the Hill
Locally, jobs take us to homes and businesses close to Northwick Park, St Dominic's Sixth Form College and Orley Farm School, among other places. For rail, the closest station is Sudbury Hill Harrow station, roughly 0.5 miles south of the centre. Well-known places in the area include Kodak Museum (2 miles north) and Clementine Churchill Hospital (within half a mile south-east). Not far away are Middle Lake and Northala Fields.
Should I look at the roof myself first?
During heavy rain, look at the gutters from the ground or a window. Overflowing water can point to a blockage or a sagging run.
A lot can be seen from the ground. With binoculars, look for slipped or missing slates and tiles, gaps along the ridge and leaning chimneys. Please don’t climb up for a closer look.
Prices for flat roof surveys in Harrow on the Hill
Not every roof costs the same to survey, for these reasons:
- The number of roofs, including extensions and garages
- The height of the building and how the roof can safely be seen
- How complicated the roof is, with its valleys, chimneys and parapets
- Basic, Standard or Premium
A small, low roof with good viewpoints takes less time than a tall, complicated one, and the package matters as well. We’ll give you the figure before anything is booked.
Getting in touch
These details help when you contact us:
- What’s prompted the survey
- The address and postcode of the property
- When you need the report by
- Photos of the roof, taken safely from ground level or a window
Surveys can be booked for weekdays, Saturdays or Sundays. To find a date that works for you, phone 07833 053749 or drop us an email.
How the survey works
It helps to start with what’s prompted the survey: a purchase, a leak, a storm, new work or simply peace of mind. That way we can focus on what matters to you. Most visits take roughly 1–2 hours for a small flat roof at home, and longer for a large commercial one. In a London area like Harrow on the Hill, the main things to sort out are parking and access: let us know about permits, visitor bays or off-street space, which floor the property is on and how to get into the loft. On the day, the roof is looked at from ground level, from windows, from inside the loft space and from the roof where it is safe.
- First we go through the roof, what’s beneath it and any problems so far.
- 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.
- Upstands, outlets, edge trims and rooflights are checked and photographed.
- The report, with photos and recommendations, comes to you by email.
How to prepare
- Tell us where we can park nearby
- Keep pets in another room
- Leave side gates unlocked
Booking a survey
When you are ready to go ahead, call 07833 053749 or use the contact form. We’ll suggest a package, agree the price and find a date.
Read more
How the survey changes by roof type
Mastic asphalt
Asphalt roofs are common on older flats, walkways and commercial buildings. The survey checks for crazing, cracking, blistering and splits where the asphalt turns up the walls.
GRP fibreglass
GRP can crack if the deck beneath flexes or if the resin was laid too thin. Our report notes cracks and any sign that the deck is flexing.
What we can’t see
Some things can’t be seen without opening up the roof, and that sets some limits:
- An exact number of years the roof has left
- What’s under the membrane without opening it up
- A structural engineer’s assessment of the deck
If in doubt, ring 07833 053749 or drop us an email and we will suggest the right survey. What a survey covers and does not.
What we check
- Mastic asphalt
- Single-ply membranes
- Upstands and outlets
- Felt flat roofs
- GRP fibreglass
- EPDM rubber