- Guide price
- £2,650–£4,650
- Survey
- Free for new and replacement roofs
- Quote
- Fixed, in writing
- Coverage
- England, Wales, Scotland, NI
West Dunbartonshire at a glance
- Largest towns
- Clydebank, Vale of Leven, Dumbarton, Duntocher
- Postcode areas
- G
- Building standards
- West Dunbartonshire Council
- Neighbouring areas
- Renfrewshire · East Dunbartonshire · Inverclyde · Glasgow City
- Guide price region
- Scotland (−5% on West Midlands rates)
How much does a flat roof replacement cost in West Dunbartonshire?
Guide prices including VAT at Scotland rates. The fixed price comes after a free survey for new and replacement roofs.
| Job | Guide price inc VAT |
|---|---|
| Extension (20 m²), EPDM, new deck + insulation | £2,650–£4,650 |
| Single garage (18 m²), torch-on felt | £1,450–£2,500 |
| Extension (20 m²), GRP, new deck + insulation | £2,850–£5,100 |
| Single garage (18 m²), EPDM rubber | £1,500–£2,650 |
Which flat roofs are common in West Dunbartonshire?
Flat roofs in West Dunbartonshire sit on lock-up garage blocks on estates, low-rise post-war blocks of flats and shops with flat-roofed rear stores below flats. Scotland averages roughly 1,570 mm of rain a year, with the west far wetter than the east, so drainage, falls and wind uplift are part of every specification we write. Approximate 1991–2020 regional averages based on Met Office data.
Building standards in Scotland
In Scotland a building warrant is usually needed for alterations, structural work and new roofs; like-for-like repairs to a covering can be exempt. Section 6 of the technical handbooks sets a domestic roof benchmark of 0.12 W/m²K, applied as far as reasonably practicable on an existing roof. In West Dunbartonshire the application goes to West Dunbartonshire Council (building standards). More on the rules.
Which system should I replace my flat roof with?
The right system depends on the roof's size, shape, use and number of details, so no single material suits every roof. These are the usual starting points:
- EPDM rubber suits simple, rectangular roofs, where one sheet can often cover the area with few or no joins.
- GRP fibreglass suits roofs with many corners, rooflights or edges, and gives a rigid surface for occasional maintenance traffic.
- Torch-on felt is a layered, hard-wearing system that keeps the cost down on larger or plain roofs.
- Liquid-applied systems handle awkward details and can overlay a sound existing surface.
- Single-ply and mastic asphalt are more usual on commercial roofs, blocks and terraces.
We recommend a system at survey and explain why. Our EPDM vs GRP vs felt guide sets out the trade-offs if you want to compare first.
Which towns in West Dunbartonshire do we cover?
Flat roof replacement in West Dunbartonshire: questions
Which towns in West Dunbartonshire do you cover?
All of West Dunbartonshire. The main towns have their own pages below, and if yours isn't listed we still cover it: send your postcode and we'll confirm.
How much does a flat roof replacement cost in West Dunbartonshire?
£2,650–£4,650 for a 20 m² extension roof in EPDM with a new deck and insulation, at Scotland guide rates including VAT. The fixed price comes after a free survey for new and replacement roofs.
Which postcode areas do you cover in West Dunbartonshire?
All of West Dunbartonshire, including the G postcode areas. Send your full postcode and we'll confirm.
What guarantees come with a replacement roof?
Every re-roof comes with a written workmanship guarantee, with the length set out in your quote. Manufacturer material guarantees are available on many systems and we register them for you where the system allows; ask about insurance-backed options too.
Do I need to be at home while the roof is replaced?
Not for most of the job, as long as the team can reach the roof and there is room for a skip. We ask you to be there at the start to agree the plan and at the end to look over the finished roof.
Is VAT charged on a flat roof replacement?
Yes, roof replacement is standard-rated at 20%, and an insulated replacement is treated as a single supply. Our guide prices already include VAT.
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