Flat Roofing in Kingston upon Thames

Kingston upon Thames at a glance

Postcode districts: KT1, KT2, KT5, KT6, KT3, KT9
Council area: Royal Borough of Kingston upon Thames
Building approval: Royal Borough of Kingston upon Thames building control, or a registered building control approver
Guide price region: London (+20% on West Midlands rates)

What flat roof work do we do in Kingston upon Thames?

Extension and kitchen roofs

If you're fitting a new kitchen under an extension in Kingston upon Thames, that's a good time to replace the roof. It makes sense to rebuild the roof before fitting new units, ceilings and lighting below, and the insulation upgrade makes the room more comfortable all year.

GRP fibreglass roofing

If a flat roof in Kingston upon Thames has already been patched with fibreglass that keeps cracking, a full GRP replacement on a new, properly fixed deck often solves the problem. Cracks usually come from movement in the boards beneath, so renewing the deck and reinforcing the joints deals with the cause.

Green and sedum roofs

Garden rooms and outbuildings in Kingston upon Thames, as elsewhere, often have small flat roofs that are seen from the house and garden. A sedum finish helps them blend in, provided the structure is strong enough and the roof underneath is built properly.

All flat roof services in Kingston upon Thames:

How much does a flat roof cost in Kingston upon Thames?

Guide prices at London rates including VAT. New and replacement roofs get a fixed price after a free survey; repair prices are confirmed once we've found the problem.

Job	Guide price inc VAT
Extension (20 m²), EPDM, insulation + 1 rooflight upstand	£3,600–£6,300
Porch or bay (4 m²), EPDM	£900–£1,500
Extension (20 m²), felt, new deck + insulation	£3,250–£5,600
Extension (20 m²), EPDM, new deck + insulation	£3,350–£5,850
Balcony (12 m²), liquid-applied, scaffold	£2,300–£3,900

What flat roofs are typical in and around Kingston upon Thames?

In a town like Kingston upon Thames flat roofs are mostly on mansard and dormer loft conversions and kitchen extensions and roof terraces behind period houses. The climate is part of the brief. 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. Approximate 1991–2020 regional averages based on Met Office data.

Who approves flat roof work in Kingston upon Thames?

Where approval is needed it goes to Royal Borough of Kingston upon Thames building control, or a registered building control approver. Replacing more than half of a roof over a heated room usually counts as renovating a thermal element, so it is insulated to current standards and notified to building control. How the rules work.

Which places near Kingston upon Thames do we cover?

Flat roofing in Kingston upon Thames: questions

Do you cover Kingston upon Thames?

Yes, including postcode districts KT1, KT2, KT5, KT6, KT3, KT9. Send your postcode with your enquiry and we'll arrange a survey.

What's the best flat roof system for a house in Kingston upon Thames?

For most garages and extensions it's EPDM or GRP; torch-on felt is the budget option and liquid suits detailed or overlay jobs. We recommend one at the survey.

How much is a new flat roof in Kingston upon Thames?

A typical 18 m² EPDM garage roof is £1,900–£3,350 and a 20 m² insulated EPDM extension roof is £3,350–£5,850, at London guide rates including VAT.

Can you repair a leaking flat roof in Kingston upon Thames?

Yes. We trace where the water is actually getting in first, because the leak inside is rarely under the defect outside, then repair with materials compatible with your roof.