Flat RoofingContractors

Upgrades

Warm roof insulation upgrades in Fleet

A flat roof in Fleet that drips in cold weather without any rain is often suffering from condensation rather than a leak. Upgrading to a warm roof when the covering is replaced deals with the cause by keeping the deck above dew point and adding a vapour control layer.

Foil-faced PIR insulation boards laid over a vapour control layer to make a warm flat roofComputer-generated example image

Fleet at a glance

Postcode districts
GU13, GU51, GU52
Population
about 38,726 (GeoNames)
Council area
Hart District Council
Building approval
Hart District Council building control, or a registered building control approver
Nearest main town
Bracknell, about 10 miles
Guide price region
South East (+10% on West Midlands rates)

Why upgrade to a warm roof in Fleet?

Kitchen extensions in Fleet, as elsewhere, produce a lot of moisture from cooking. Under a cold flat roof, that moisture can condense on the deck. A warm roof keeps the deck warm and puts a vapour control layer in the way, which lowers the risk considerably.

Around Fleet, flat roofs are common on bungalows with flat-roofed side extensions and dormers and on low-rise post-war blocks of flats. 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 warm roof upgrade cost in Fleet?

At South East guide rates, a 20 m² extension roof in EPDM with a new deck and insulation comes to £3,100–£5,350 including VAT. The fixed price comes after a free survey for new and replacement roofs.

JobGuide price inc VAT
Extension (20 m²), EPDM, new deck + insulation£3,100–£5,350
Extension (20 m²), EPDM with sedum green roof£4,850–£8,900

Do I have to insulate my flat roof when I replace it?

Usually, yes, if the roof is over a heated room and you are replacing more than half of its covering. In England, Wales and Northern Ireland, that counts as renovating a thermal element, so the roof should be upgraded to the renovation standard where that is technically, functionally and economically feasible.

The rules don't usually apply to patch repairs, or to an unheated, detached garage. The target U-value depends on where you live:

NationRoof renovation target
England0.16 W/m²K (homes), 0.18 (non-domestic)
Wales0.16 W/m²K
ScotlandSection 6 framework, with a domestic benchmark of 0.12 W/m²K pursued as far as reasonably practicable
Northern Ireland0.18 W/m²K

A new extension roof has a tighter target than a renovation: 0.15 in England and 0.13 in Wales. The economic test in England's guidance is a simple payback within 15 years. We handle building control or building standards where it is needed. The building regulations page sets out the approval routes in each nation.

What's included?

  • Building control or building standards handled where needed
  • Vapour control layer on the warm side of the insulation
  • Rigid insulation boards sized to the U-value target
  • New waterproofing, with a written workmanship guarantee

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?

Warm roof insulation upgrades in Fleet: questions

Do you cover Fleet?

Yes. Fleet is part of our Hampshire coverage, including postcode districts GU13, GU51, GU52. 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 Fleet?

Where the work needs approval it goes to Hart District 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 warm roof upgrade cost in Fleet?

£3,100–£5,350 for a 20 m² extension roof in EPDM with a new deck and insulation, at South East guide rates including VAT. The fixed price comes after a free survey for new and replacement roofs.

Will a warm roof make my room warmer?

Usually, yes. A room under a poorly insulated flat roof loses less heat once the roof is upgraded and tends to feel more even in temperature. How much difference you notice depends on how the roof was built before.

Is a warm roof worth it on a garage?

On a detached, unheated garage, usually not, as there is no heated space to protect and the thermal rules don't normally apply. On an integral or heated garage, or one being converted into a room, it is.

Other flat roof work in Fleet

Warm roof insulation upgrades in Fleet: get a fixed price

Free survey and a written fixed quote for replacement and new roofs. No obligation.

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