Tonbridge at a glance
- Postcode districts
- TN9, TN10, TN11
- Population
- about 36,115 (GeoNames)
- Council area
- Tonbridge and Malling Borough Council
- Building approval
- Tonbridge and Malling Borough Council building control, or a registered building control approver
- Nearest main town
- Maidstone, about 12 miles
- Guide price region
- South East (+10% on West Midlands rates)
Why choose a liquid-applied roof in Tonbridge?
If a flat roof in Tonbridge is ageing but still dry, firmly bonded and on a sound deck, a reinforced liquid system can be applied over it. That avoids the cost and mess of a full strip-out, provided the moisture and adhesion checks at survey show the existing roof is fit to build on.
Tonbridge's flat roofs are mostly on 1960s and 1970s link-detached houses with flat-roofed garages and porches, with plenty on terraced streets with flat-roofed rear kitchens and bathrooms too. Much of the South East sits in the drier Thames catchment at roughly 730 mm of rain a year, so the usual failures are at joints, upstands and outlets rather than from sheer volume of rain.
How much does a liquid-applied roof cost in Tonbridge?
For Tonbridge we use South East rates: £2,250–£3,600 is the guide for a typical 18 m² garage roof in a liquid-applied system, VAT included. The fixed price comes after a free survey for new and replacement roofs.
| Job | Guide price inc VAT |
|---|---|
| Single garage (18 m²), liquid-applied | £2,250–£3,600 |
| Balcony (12 m²), liquid-applied, scaffold | £2,100–£3,600 |
| Single garage (18 m²), EPDM rubber | £1,750–£3,100 |
| Extension (20 m²), EPDM, new deck + insulation | £3,100–£5,350 |
Do building regulations apply if a liquid coating goes over my roof?
They can. In England, Wales and Northern Ireland, re-covering more than half of a roof over a heated room is usually renovation of a thermal element, even when the new membrane goes over the old, so the roof should be insulated towards the renovation standard where feasible; for a Scottish property, the local building standards team will confirm whether a warrant is required.
A minor coating repair to a small area is different from re-covering the whole roof. Where insulation is needed, an overlay is not always practical, because the insulation has to go under a new waterproof layer. In that case we may recommend stripping to the deck, fitting a warm roof and applying the liquid system on top. Where approval applies, we deal with the paperwork; details are on the building regulations page.
What's included?
- Top coat with optional anti-slip finish, and guarantee registration where available
- Fleece-reinforced liquid membrane applied to the specified thickness
- Primer matched to the substrate
- Detailing of upstands, outlets, pipes and corners before the main area
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?
- Royal Tunbridge Wells · 4 mi
- Sevenoaks · 6 mi
- Crowborough · 10 mi
- Maidstone · 12 mi
- East Grinstead · 13 mi
- Longfield · 14 mi
Liquid-applied roofing in Tonbridge: questions
Do you cover Tonbridge?
Yes. Tonbridge is part of our Kent coverage, including postcode districts TN9, TN10, TN11. 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 Tonbridge?
Where the work needs approval it goes to Tonbridge and Malling Borough Council 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 liquid-applied roof cost in Tonbridge?
£2,250–£3,600 for a typical 18 m² garage roof in a liquid-applied system, at South East guide rates including VAT. The fixed price comes after a free survey for new and replacement roofs.
Does a liquid roof smell when it is applied?
Some systems, particularly PMMA, have a strong odour during application, while many polyurethane and water-based products are milder. We tell you what to expect and plan around windows and vents.
Is liquid roofing the same as a roof paint?
No. A proper liquid-applied membrane is built to a specified thickness and usually reinforced with fleece, while roof paints and simple coatings are much thinner and mainly used to extend the life of an existing covering.