Case study · 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.
- LocationWembley Central (Brent), HA0
- PropertyHouse with flat-roofed sections
- PhotographedJuly to September 2025
- Estimated cost£9,900 to £16,600 + VAT
The starting point
The first photos, from 26 July 2025, show a weathered flat roof and, inside below it, a cracked and stained ceiling. A second section of roof had split, lifting felt. The rooms below needed bringing up to a warmer, cleaner finish, and the bathroom and shower room were due a refit.
What we did
- Insulation and re-boarding. Rigid insulation boards were fixed to the walls of the room, then plasterboard over them, then a full skim and paint.
- Bathroom. A new bath was fitted and boxed in, with a new WC.
- Shower room. A quadrant enclosure, new floor tiles, basin and a chrome towel rail.
- Flat roof. The split joints and edges on the failing section were cleaned and coated in a waterproof membrane, sealing the seams and upstands.
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
The photos show three phases. 26 July 2025: roof and ceiling inspected. 9 to 12 August: insulation, plasterboard and skim, with the room finished on 12 August. 25 to 31 August: the bathroom and shower room. 18 to 19 September: the second roof section repaired and coated. About eight weeks end to end, with the work done in short blocks rather than continuously.
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) |
|---|---|---|
| Internal wall insulation | Around 30 m² of wall insulated, boarded and skimmed | £2,100 to £3,600 |
| Decoration | The insulated room painted | £350 to £800 |
| Bathroom refresh | New bath and WC, existing wall tiles kept | £2,900 to £4,600 |
| Shower room | Quadrant enclosure, floor tiles, basin, towel rail | £2,900 to £4,600 |
| Flat roof repair and coating | Around 25 m² coated in a liquid membrane | £1,650 to £3,000 |
| Estimated total | £9,900 to £16,600 | |
Internal wall insulation: £70 to £120 per m² (Trade2Base, The Eco Experts 2026). Bathroom and shower room: the cosmetic refresh tier of £3,500 to £5,500 each from our Bathroom Renovation Cost guide, ex VAT. Flat roof: liquid membrane £60 to £100 per m² (Trade2Base 2026) plus 10 to 20% for London (MyJobQuote). Areas are estimated from the photos. Typical London market ranges, not fixed Soraiz Builders prices.
The services behind this job
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