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UKFR - ROOFING AND INSULATION SPECIALISTS

Flat Roof Insulation Boards

Order your flat roof insulation boards with confidence when you shop with UKFR. As both flat roofing and insulation specialists, you can be sure that our range of flat roof insulation is of the best quality with trusted brands including Rockwool, Recticel and Kingspan. Browse our selection for high performance flat roof insulation boards with excellent fire ratings.

Shop All Flat Roof Insulation Boards

UKFR - ROOFING AND INSULATION SPECIALISTS

Flat Roof Insulation Boards

Shop All Flat Roof Insulation Boards

Browse Flat Roof Insulation Boards Categories

Brands

ECOTHERM (3)
Kingspan (2)
RECTICEL (3)
Rockwool (11)
Soprema (1)

Thickness

25mm - 12 Boards* - 8.64sq.m (1)
25mm - 12 Boards - 34.56sq.m (1)
25mm - 12 Sheets - 8.64sq.m (1)
25mm - 12 Sheets - 34.56sq.m (1)
25mm - 18 Sheets - 51.84sq.m (1)
25mm - 20 Sheets - 14.4sq.m (1)
30mm - 10 Sheets - 7.2sq.m (1)
30mm - 14 Sheets - 10.5sq.m (1)
30mm - 16 Sheets - 11.52sq.m (1)
40mm - 10 Sheets - 7.5sq.m (1)
50mm - 6 Boards - 8.64sq.m (1)
50mm - 6 Boards - 17.28sq.m (1)
50mm - 6 Sheets - 4.32sq.m (1)
50mm - 6 Sheets - 8.64sq.m (1)
50mm - 6 Sheets - 17.28sq.m (1)
50mm - 8 Sheets - 6.0sq.m (1)
50mm - 8 Sheets - 23.04sq.m (1)
50mm - 10 Sheets - 7.2sq.m (2)
60mm - 5 Boards - 7.2sq.m (1)
60mm - 5 Boards - 14.4sq.m (1)
60mm - 5 Sheets - 7.2sq.m (1)
60mm - 5 Sheets - 14.4sq.m (1)
60mm - 5 Sheets - 14.40sq.m (1)
60mm - 8 Sheets - 5.76sq.m (1)
80mm - 4 Boards - 11.52sq.m (1)
80mm - 4 Sheets - 2.88sq.m (1)
80mm - 4 Sheets - 5.76sq.m (1)
80mm - 4 Sheets - 11.52 sq.m (1)
80mm - 4 Sheets - 11.52sq.m (1)
80mm - 5 Sheets - 3.75sq.m (1)
90mm - 3 Sheets - 8.64sq.m (1)
100mm - 3 Boards - 8.64sq.m (1)
100mm - 3 Sheets - 8.64sq.m (1)
100mm - 4 Boards - 5.76sq.m (1)
100mm - 4 Sheets - 3.0sq.m (1)
100mm - 4 Sheets - 5.76sq.m (1)
100mm - 4 Sheets - 11.52sq.m (1)
100mm - 5 Sheets - 3.6sq.m (3)
120mm - 2 Boards - 5.76sq.m (1)
120mm - 2 Sheets - 5.76sq.m (1)
120mm - 3 Sheets - 2.25sq.m (1)
120mm - 4 Boards - 5.76sq.m (1)
120mm - 4 Sheets - 2.88sq.m (3)
120mm - 4 Sheets - 5.76sq.m (1)
120mm - 4 Sheets - 11.52sq.m (1)
130mm - 3 Boards - 4.32sq.m (1)
130mm - 3 Sheets - 2.16sq.m (1)
130mm - 3 Sheets - 4.32sq.m (1)
130mm - 4 Sheets - 2.88sq.m (2)
140mm - 2 Boards - 2.88sq.m (1)
140mm - 2 Boards - 5.76sq.m (1)
140mm - 2 Sheets - 2.88sq.m (1)
140mm - 2 Sheets - 5.76sq.m (1)
140mm - 3 Sheets - 2.25sq.m (1)
140mm - 3 Sheets - 8.64sq.m (1)
140mm - 4 Sheets - 2.88sq.m (2)
150mm - 2 Boards - 2.88sq.m (1)
150mm - 2 Boards - 5.76sq.m (1)
150mm - 2 Sheets - 2.88sq.m (1)
150mm - 2 Sheets - 5.76sq.m (1)
150mm - 3 Sheets - 8.64sq.m (1)
150mm - 4 Sheets - 2.88sq.m (2)
160mm - 2 Sheets - 1.5sq.m (1)

Length

1200mm (1)

Price Range

Ecotherm InnoBond - Tissue Faced PIR

£83.99 inc. VAT

£69.99 ex. VAT

Recticel Powerdeck F

£135.59 inc. VAT

£112.99 ex. VAT

Ecotherm InnoFix - Foil Faced PIR

£335.39 inc. VAT

£279.49 ex. VAT

Recticel Eurothane Eurodeck

£394.79 inc. VAT

£328.99 ex. VAT

Kingspan TR27 - Tissue Faced Flat Roof Board

£94.79 inc. VAT

£78.99 ex. VAT

Kingspan TR26 - Foil Faced Flat Roof Board

£365.99 inc. VAT

£304.99 ex. VAT

Ecotherm InnoTorch - Bitumen Faced PIR

£101.99 inc. VAT

£84.99 ex. VAT

Recticel Powerdeck U

£139.19 inc. VAT

£115.99 ex. VAT

Rockwool Hardrock Multi DD 60mm - 1000 x 1200mm

£46.20 inc. VAT

£38.50 ex. VAT

Rockwool Hardrock Multi DD 85mm - 1000 x 1200mm

£57.59 inc. VAT

£47.99 ex. VAT

Rockwool Hardrock Multi DD 105mm - 1000 x 1200mm

£68.39 inc. VAT

£56.99 ex. VAT

Rockwool Hardrock Multi DD 115mm - 1000 x 1200mm

£74.39 inc. VAT

£61.99 ex. VAT

Rockwool Hardrock Multi DD 150mm - 1000 x 1200mm

£91.80 inc. VAT

£76.50 ex. VAT

Rockwool Hardrock Underlay DD 150mm - 1000 x 1200mm

£85.19 inc. VAT

£70.99 ex. VAT

Rockwool Hardrock Multi DD 185mm - 1000 x 1200mm (Pallet 6)

£665.99 inc. VAT

£554.99 ex. VAT

Rockwool Hardrock Multi-Fix Recovery Boards - 30 x 1000 x 1200mm (Pallet 40)

£1040.39 inc. VAT

£866.99 ex. VAT

Rockwool UB34 56mm - 600 x 1200mm

£79.19 inc. VAT

£65.99 ex. VAT

HardRock Multi-Fix Angle Fillets

£483.59 inc. VAT

£402.99 ex. VAT

Rockwool Tapered Insulation | Hardrock Multi-DD

£0.00 inc. VAT

£0.00 ex. VAT

SOPRA XPS SL 300

£70.79 inc. VAT

£58.99 ex. VAT

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High Performance Flat Roof Insulation Boards

Shop a wide selection of high-performance flat roof insulation boards designed to secure your home from fluctuating temperature changes.

From reputable and trusted brands including Ecotherm, Recticel, Kingspan and Rockwool, you can find highly efficient thermal insulation solutions for your flat roof.

Browse our flat roof insulation boards and enjoy fast shipping from our UK branches.

Buy Insulation Boards for Flat Roofs

Our range of insulation flat roof boards is designed to bring high thermal performance to any building with ease, saving you time and money in the process.

We supply market-leading brands including Ecotherm, Recticel, Kingspan and Rockwool - each suitable for a variety of applications:

Mechanically Fixed / Foil Faced Insulation - Kingspan TR26, Ecotherm InnoFix & Recticel Eurothane EuroDeck - High-performance, fibre-free and rigid thermoset insulation boards. These have a thermal conductivity of 0.022 W/mk, foil facing on both sides and are fully compatible with most mechanically fixed single-ply membranes and most green roof systems.
Fully Adhered / Tissue Faced Insulation - Kingspan Thermaroof TR27, Ecotherm InnoBond & Recticel Powerdeck F - High-grade, high-performance and fibre-free boards used for advanced insulation applications on new build & refurbishment projects. These have a glass tissue facing on both sides and are compatible with non-bituminous and fully bonded membranes, partially built-up felt, mastic asphalt and cold liquid-applied waterproofing systems.
Rockwool Hardrock - An effective flat roof insulation system compatible with a range of bonded & mechanically fixed roof systems. They have high-quality acoustic, fireproof and thermal properties ideal for new and old buildings.
Torch On / Bitumen Faced - Ecotherm EcoTorch - High-performance insulation with a fibre-free rigid thermoset PIR core. Available in varying thicknesses from 30mm-150mm, they are suitable for flat roofs with partially bonded torch-applied multi-layer bituminous waterproofing. EcoTorch is formerly known as EcoTherm Inno-Torch, these share the same specifications as Kingspan TR24, making them a suitable alternative.

If you're installing insulation for a pitched roof, check out our full range including Kingspan TP10, Kooltherm and Celotex PIR insulation boards. Alternatively, you can visit our full range of insulation materials including glass fibre and mineral wool insulation.

Why should I use an insulation board for my flat roof?

Energy efficient
Insulation generally has low thermal conductivity, creating thermal barriers between inside and outdoors to reduce heat loss - keeping your home warm in the winter and cool in the summer.

Durable
Rigid insulation boards are manufactured using high-quality materials for compressive strength to last a lifetime. If left undamaged, they can last between 80-100 years before needing replacing.

Soundproofing
Depending on your insulation's thickness, it will help to reduce noise travelling through the building, as well as from outside.

Easy to install
They are easy to install and can be cut down to your required length using a standard saw or cutting tool.

Why Buy From UKFR?

At UKFR Roofing & Insulation, we're a proud supplier of flat roofing insulation products, keeping customers across the country warm throughout the year.

With over 50 years of experience in the construction industry, we understand the importance of finding the right insulation. If you are unsure about what insulation you need for your flat roof, please feel free to get in touch with us and we'll be happy to help.

Frequently Asked Questions

Which Insulation is Best for Flat Roofs?

Flat roof insulation allows interiors of any home to feel warmer during the winter, and cooler during the summer. Hardrock and PIR work well as insulation for flat roofs and can be often found in modern constructions. This is due to them being rigid board with high quality thermal properties compared to older types of roof insulation, such as glass wool.

What are PIR Insulation boards?

PIR stands for polyisocyanurate which is a type of rigid foam insulation that's used in building construction

How thick should flat roof insulation be?

For any flats or homes that are uninsulated, you should aim to insulate your flat roofs with insulation boards totalling around 150mm in thickness.

New government guidelines from 2021 that were updated in 2022 have stated that for flat roofs target U-value W/(m2-k) of 0.11 for new build dwellings, 0.15 for Extensions and 0.16 for refurbishments and 0.18 for other buildings that are not classed as dwellings.

Below is an example of how to understand how thick your flat roof insulation should be:

0.11 W/(m2·K) for a New Build Dwelling

Foil Faced - TR26/EcoFix/EuroDeck would be 180mm
Tissue Faced - TR27/EcoBond/Powerdeck F would be 210mm
Rockwool Hardrock would be 335mm

0.15 W/(m2·K) for an Extension on a Dwelling

Foil Faced - TR26/EcoFix/EuroDeck would be 130mm
Tissue Faced - TR27/EcoBond/Powerdeck F would be 150mm
Rockwool Hardrock would be 235mm

0.16 W/(m2·K) for a Refurbishment on a Dwelling

Foil Faced - TR26/EcoFix/EuroDeck would be 130mm
Tissue Faced - TR27/EcoBond/Powerdeck F would be 140mm
Rockwool Hardrock would be 220mm

0.18 W/(m2·K) for non-dwelling

Foil Faced - TR26/EcoFix/EuroDeck would be 120mm
Tissue Faced - TR27/EcoBond/Powerdeck F would be 120mm
Rockwool Hardrock would be 190mm

These calculations are based on a timber deck with Single Ply / EPDM Rubber Roofing.

For more information on U-Value Calculations, please click the following links for all associated brands

Check out the government guidelines here.

Does flat roof insulation require a vapour control layer?

Yes, installing flat roof insulation boards should be done alongside a vapour barrier to prevent dampness, mould and rot from occurring.

Which insulation has the best fire class rating?

Rockwool Hardrock is the most fire-resistant insulation, with a euro class rating of A2-s1,d0 (BS EN 13501-1) and fire resistance up to 120 minutes.

	International House, 61 Mosley Street, Manchester, M2 3HZ, United Kingdom (Appointment Only)
	sales@ukflatroofing.com
	Contact us via WhatsApp
	0800 054 8324

	International House, 61 Mosley Street, Manchester, M2 3HZ, United Kingdom (OFFICE - Appointment Only)
	sales@ukflatroofing.com
	Contact us via WhatsApp