Case study · Harrow
Flat roof edge repair in Wealdstone
A failed flat roof edge in Wealdstone, where the felt had lifted and the timber had rotted, cut back and repaired with a reinforced liquid membrane in January 2026.
- LocationWealdstone (Harrow), HA3
- PropertyHouse with a flat roof section
- PhotographedJanuary 2026
- Estimated cost£600 to £1,400 + VAT
The starting point
On 9 January 2026 the edge of the flat roof had lifted away completely. The edge trim had come loose, the felt had peeled back and the timber underneath was rotten and open to the weather. Left like that, every rainfall would run straight into the structure.
What we did
- The failed felt was cut back to sound material and the area cleaned and prepared.
- The damaged edge was rebuilt and a new edge sealed in.
- A reinforced liquid membrane was laid over the repair and lapped onto the existing roof.
- A final coat was applied and the repair checked again later in the month.
The photos
Every photo was taken on site during the job. Click any photo to enlarge it.
Before
During the work
After
How long it took
Inspected on 9 January 2026, repaired on 18 January, and photographed again after the final coat on 26 January.
What this job would cost at 2026 London rates
Estimated from the photographed scope, not the client's invoice
| Item | What the photos show | Estimate (ex VAT) |
|---|---|---|
| Edge and patch repair | Around 4 to 6 m² cut back, edge rebuilt, reinforced membrane | £600 to £1,400 |
| Estimated total | £600 to £1,400 | |
Flat roof repairs run £100 to £140 per m² on bitumen and £130 to £180 per m² for GRP-type repairs, with patch repairs typically £200 to £600 (Trade2Base 2026), plus 10 to 20% for London (MyJobQuote). The upper end allows for the rebuilt edge. Typical London market ranges, not fixed Soraiz Builders prices.
The services behind this job
More projects like this
10 photosWealdstone (Harrow)
Flat roof re-covering over a rear extension in Wealdstone
The flat roof over a Wealdstone rear extension stripped and re-covered in six days in February 2026, with the water-damaged plaster inside patched once the roof was watertight.
Read the case study
8 photosHarrow Weald (Harrow)
Bathroom refit and flat refresh in Harrow Weald
A Harrow Weald flat turned around in a week in January 2026: a new bath and electric shower, new wood-effect flooring in the living room and hall, and a full repaint.
Read the case study
13 photosWembley Central (Brent)
Insulation, bathroom refit and flat roof repair in Wembley
A Wembley job run in phases over eight weeks in 2025: a room insulated and re-boarded, a bathroom and shower room refitted, and two sections of flat roof repaired and coated.
Read the case studyPlanning something similar in Harrow?
Tell us what you have in mind. A site visit and a written, fixed-price quote follow, and we reply within 2 hours during business hours.