Hounslow at a glance
- Postcode districts
- TW3, TW5, TW4, TW7, UB2, TW14, UB1, TW13 and 2 more
- Council area
- London Borough of Hounslow
- Building approval
- London Borough of Hounslow building control, or a registered building control approver
- Guide price region
- London (+20% on West Midlands rates)
When does a garage roof in Hounslow need replacing?
Garage roofs in Hounslow are often replaced when the deck gives way. Chipboard decks swell and soften once they get wet, and you may see sagging between joists or feel the roof flex underfoot. Replacing the deck and covering together is usually more economical than repeated repairs.
In and around Hounslow, flat roofs are typically found on Victorian and Edwardian terraces with flat-roofed back additions, and on shops with flat-roofed stores below flats above. The Thames basin is one of the drier parts of Britain at roughly 730 mm of rain a year, but summer heat is the bigger test here: dark membranes on south-facing roofs swing a long way in temperature.
How much does a new garage roof cost in Hounslow?
At London guide rates, a typical 18 m² garage roof in EPDM comes to £1,900–£3,350 including VAT. The fixed price comes after a free survey for new and replacement roofs.
| Job | Guide price inc VAT |
|---|---|
| Single garage (18 m²), EPDM rubber | £1,900–£3,350 |
| Single garage (18 m²), torch-on felt | £1,800–£3,150 |
| Single garage (18 m²), GRP fibreglass | £2,150–£3,900 |
| Extension (20 m²), GRP, new deck + insulation | £3,600–£6,450 |
What if my garage roof is asbestos cement or old felt?
If your garage has corrugated cement sheets, especially on a pre-2000 building, assume they could contain asbestos until a test says otherwise. We do not remove asbestos; any suspected material is tested and, if confirmed, removed by a licensed specialist before our work starts.
Once the old sheets have gone, the garage usually needs new timber joists or purlins and a deck before a membrane can go on. Old felt garages are more straightforward: the felt is stripped and the deck assessed in the usual way.
Lock-up blocks and rows of garages bring their own issues. A shared roof often has several owners, so we can quote per bay, or for the whole run where everyone agrees, which keeps the edges and joins between garages consistent. Attached garages need careful upstands and flashings where the roof meets the house wall, while detached ones are about edges, gutters and falls.
Not sure whether your roof needs replacing? Our guide to repair or replace sets out the signs.
What's included?
- Strip-out of old felt, chippings and waste
- Free survey of the deck, fall and gutter line
- Gutter or outlet renewed where the old one has failed
- Replacement of soft or swollen deck boards
Building regulations in England
Replacing more than half of a flat roof over a heated room usually counts as renovating a thermal element, so the roof is insulated to around 0.16 W/m²K where that's technically and economically feasible, and the work is notified to building control: the council or a registered building control approver, unless a registered competent person self-certifies it. A roof on a new extension is built to 0.15 W/m²K. Patch repairs, and most unheated detached garages, don't trigger the upgrade. Structural changes, or a new covering that adds 15% or more to the roof's weight, also need approval. More on the rules.
Which nearby areas do we also cover?
- Richmond upon Thames · 3 mi
- Ealing · 4 mi
- Kingston upon Thames · 5 mi
- Hammersmith and Fulham · 6 mi
- Hillingdon · 7 mi
- Brent · 7 mi
Garage roofs in Hounslow: questions
Do you cover Hounslow?
Yes. Hounslow is part of our London coverage, including postcode districts TW3, TW5, TW4, TW7, UB2, TW14 and 4 more. Surveys and roofs are carried out by vetted roofing teams working under S&K Property Investments and Improvement Ltd.
Who checks building regulations for a flat roof in Hounslow?
Where the work needs approval it goes to London Borough of Hounslow building control, or a registered building control approver. We tell you at the survey whether your job needs it and deal with the paperwork as part of the quote.
How much does a new garage roof cost in Hounslow?
£1,900–£3,350 for a typical 18 m² garage roof in EPDM, at London guide rates including VAT. The fixed price comes after a free survey for new and replacement roofs.
Can you replace a shared garage roof in a block?
Yes. We can quote for one garage in a row or the whole block, and we take care with the joins between bays so neighbouring roofs stay watertight.
How long does a garage roof last?
It depends on the system. As indicative figures, EPDM lasts 25–50 years, GRP 20–40 and modern torch-on felt 15–25, with good specification and maintenance.