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New warm roofs across the flat roof sections of Torentum Court, Fleetwood, photographed from above in March 2026
Home / Insulation / Flat Roof Insulation

Flat roof insulation, for one home or a whole scheme.

Warm roof build ups that stop heat escaping and keep the structure dry, installed by our own crews. For homeowners that means a free survey, a one or two day install and a certificate. For housing providers, councils and main contractors it means a measure we hold PAS 2030 certification for, flat roof insulation, priced roof by roof and delivered with residents at home.

PAS 2030:2023 certified for flat roof insulation
TrustMark registered
Insurance backed guarantees
What is flat roof insulation?

Stop heat escaping through your flat roof

A warm roof puts the insulation above the deck, so the whole structure stays on the warm side and the risk of condensation in the timbers goes away with the heat loss. We strip back, deck, insulate, lay a single ply membrane and form the kerbs and outlets properly. Where a flat roof meets a pitched slope we lift the tiles, run the build up under them and reinstate. Up to a quarter of a home’s heat can be lost through an uninsulated flat roof, which is why extensions, dormers and garage roofs are so often the cold room in the house.

Book a free home surveySee it on a real scheme →
Diagram showing warm flat roof build up, waterproofing layer, insulation, vapour control layer, decking, existing roof joists and ceiling
Who we do it for

One home, or a hundred.

The same crews, the same warm roof build up and the same paperwork, whether it is the extension at the back of your house or every flat roof on a housing scheme.

Homeowners

Extension roofs, dormers, garages and porches. The rooms under them are the cold ones in winter and the hot ones in summer, and a warm roof fixes both.

  • Free survey at your home, with a straight answer on whether the roof needs insulating or replacing
  • Itemised quote, no pressure, and 0% VAT on the insulation
  • Typically one to two days on site, tidy, and the roof looks the same from the ground
  • Certificate and an insurance backed guarantee in your handover pack
Book a free home surveyCall 01200 407790

Housing providers, councils and main contractors

Flat roof insulation is our PAS 2030 certified measure, which is what funded retrofit programmes need from the installer of record. We deliver it as a package, on our own or as a subcontractor to your principal contractor.

  • PAS 2030:2023 for flat roof insulation (measure B5) and TrustMark registration, the two things a funding body checks first
  • Roof by roof survey and pricing, so the tender is measured, not estimated
  • Occupied homes as standard: residents stay in, access is planned, work is photographed before, during and after
  • Sequenced with the trades that follow, so solar and ventilation are not waiting on the roofs
  • Handover pack for your retrofit coordinator: certificates, photos, guarantees
Talk to us about a programmeSub contracting →
Torentum Court, Fleetwood, October 2025: new membrane down on the flat roofs with the scaffold still up
Case study

Fifteen roofs, one winter, residents at home.

Torentum Court is Regenda Homes’ independent living scheme in Fleetwood, and the roofs were the first package in a £700,000 energy efficiency programme. We surveyed each roof, priced them individually, rebuilt all fifteen as warm roofs and lifted and reinstated 179 metres of tiles where they meet the pitched sections, under our PAS 2030 certification for flat roof insulation.

768 m²
new warm roof
15
separate roofs
179 m
tiles reinstated
Read the case studyAll case studies →
For homeowners

Three flat roofs, photographed layer by layer.

A garage, a rear extension and an L shaped wraparound, each rebuilt as a warm roof with 140 mm of PIR above the joists, a new OSB deck and an EPDM rubber finish. One or two days each, every layer photographed, and an Insurance Backed Guarantee issued by Energy Giants on completion.

Flat roof insulation near you: East Lancashire · Greater Manchester · South Ribble & Leyland.

Benefits

Why choose flat roof insulation?

Reduce Heat Loss by Up to 25%

Keep the warmth inside your home where it belongs, with a properly insulated flat roof.

Lower Energy Bills

Less heat escaping means less energy needed to keep your home warm, saving you money year round.

Prevent Condensation & Damp

Proper insulation prevents moisture build up, protecting your property from damp and mould damage.

Extend Roof Lifespan

Insulation protects the roof membrane from thermal stress, helping your flat roof last longer.

Our process

How it works, at home or on a scheme

1

Survey

Free at your home. On a scheme, every roof measured and photographed, so the price is per roof, not per guess.

2

Design and price

The warm roof build up specified for your roof: insulation thickness, membrane, kerbs, outlets and abutments. An itemised quote for a home, a measured package for a tender.

3

Install

Our own crews, one to two days on a house, sequenced by roof on a scheme with residents at home and access agreed in advance.

4

Inspect and photograph

Every roof inspected and photographed before, during and after, which is what the PAS 2030 flat roof insulation standard and your retrofit coordinator expect.

5

Certify and hand over

Certificates, photographs and an insurance backed guarantee in the handover pack, for you or for the client’s file.

Insurance backed guarantee
Our workmanship guarantee is insured through the Bluedrop facility, and flat roof insulation is our PAS 2030:2023 certified measure. See the certificates
Our insulation services

Other ways to insulate your home

Loft insulation material ready for installation

Loft Insulation

By properly insulating your loft, you will see dramatic savings in your heating bills and reduce heat loss.

Learn more →
Cavity wall insulation being installed at a property

Cavity Wall Insulation

Installed by drilling a series of holes in the mortar joints of the external wall and filling the cavity.

Learn more →
Internal wall insulation being installed in a home

Internal Wall Insulation

Insulating internal walls improves comfort levels while reducing energy consumption and bills.

Learn more →
Room in roof loft conversion space

Room in Roof Insulation

Keeps a comfortable temperature by reducing heat loss and maximising energy efficiency.

Learn more →
Under floor insulation beneath a suspended timber floor

Under Floor Insulation

Insulating beneath your floors cuts draughts and heat loss for a warmer ground floor.

Learn more →

Ready when you are, for one roof or fifteen.

Homeowners get a free, no obligation survey and a straight answer. Housing providers and contractors get a measured package from a PAS 2030 certified installer of flat roof insulation.

Book a free home surveyTalk to us about a programme Call 01200 407790
FAQs

Flat roof insulation questions, answered

What is flat roof insulation?

Insulation boards applied to a flat roof to prevent heat loss. High performance insulation is fitted to the top of the roof structure, creating a thermal barrier that keeps warmth inside your home.

How long does installation take?

Typically one to two days for a single home. On a scheme we programme roof by roof and agree access in advance, so residents stay in their homes throughout.

Will it affect my roof's appearance?

Minimal visual change, insulation is covered by the roof membrane. Once completed, the roof looks much the same as before, with all insulation hidden beneath the waterproof covering.

How long does it last?

40+ years with proper installation. Our high performance insulation boards are designed to last the lifetime of your roof, providing decades of thermal protection and energy savings.

Do you work for housing associations, councils and contractors?

Yes. Flat roof insulation is the measure we deliver most often for housing providers and main contractors, on our own or as a subcontractor. Torentum Court in Fleetwood is the worked example: fifteen roofs for Regenda Homes, residents at home, delivered as the first package of a wider programme. See the case study or our sub contracting page.

Are you PAS 2030 certified?

Yes, for flat roof insulation, measure B5, certificate SICI23052 P2030 1 held by Efficient Energy Systems Ltd, and we are TrustMark registered. PAS 2030 is the standard government funded retrofit requires from the installer of each measure. We say exactly what our certificate covers on the accreditations page.

Warm roof or cold roof?

Warm roof, almost always. The insulation goes above the deck, so the timbers stay on the warm side and there is no cold void to ventilate or to collect condensation. A cold roof, with insulation between the joists, only makes sense where the roof height cannot change and ventilation can be guaranteed. We will tell you which at the survey.

Can you insulate the roof without replacing it?

Sometimes. If the existing covering is sound and the deck is dry, an overlay can work. Usually a flat roof old enough to need insulation also needs a new membrane, and doing both at once is cheaper than doing them a few years apart. The survey settles it, and we say so honestly if the roof is fine as it is.

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