Buy Recticel Insulation Online: Eurothane GP, Eurowall and Flat Roof Boards
Recticel is one of the PIR board makers we stock, alongside Kingspan and Celotex. This guide explains the Recticel boards we sell: the Eurothane GP sheet for floors, walls and roofs, the Eurowall cavity boards and the Powerdeck and Eurodeck flat roof boards. You will find thicknesses, live prices and where each one is used.
Quick answer
For general insulation of floors, stud walls, rafters and ceilings, the usual Recticel choice is Eurothane GP in 2400 × 1200mm sheets (2.88m² each), from 25mm to 150mm thick. For cavity walls use Eurowall (partial fill) or Eurowall+ (full fill). For flat roofs use Powerdeck or Eurodeck.
Recticel Eurothane GP: sizes and prices
| Board | Size | Price ex VAT per sheet | Per m² |
|---|---|---|---|
| Eurothane GP 25mm | 2400 × 1200mm | £13.61 | £4.73 |
| Eurothane GP 50mm | 2400 × 1200mm | £21.03 | £7.30 |
| Eurothane GP 75mm | 2400 × 1200mm | £30.58 | £10.62 |
| Eurothane GP 100mm | 2400 × 1200mm | £36.83 | £12.79 |
| Eurothane GP 150mm | 2400 × 1200mm | £51.90 | £18.02 |
Prices are live ex VAT prices on 28 October 2026 and they vary. We also stock 30, 40, 60, 70, 80, 90, 110, 120, 130 and 140mm. This gives you a lot of choice for hitting a target without wasting depth. Recticel publishes a declared R-value of 4.50 m²K/W for the 100mm board; check the datasheet for the figure for each thickness, because declared values depend on thickness.
Where to use Eurothane GP
- Floors: solid floors under screed, or between joists. See what thickness of PIR for a suspended timber floor.
- Walls: internal lining behind plasterboard, or between studs. See what thickness of PIR you need.
- Roofs and ceilings: between and under rafters for pitched roofs, where you have room for the depth.
- Garages, sheds and garden rooms: see how to insulate a shed or garage and how to insulate a garden room.
For help choosing, see our PIR U-value calculator.
Recticel cavity boards
For new cavity walls the boards go between the leaves. Partial fill keeps a gap for ventilation and drainage; full fill takes up the whole cavity. We stock Eurowall Cavity partial-fill 100mm at £117.96 for a pack of 10 (5.4m²), and 50mm at £150.41 for a pack of 20. For full fill see Eurowall+ 90mm at £127.25 for 10 boards and 140mm at £149.64. Cavity widths, wall ties and fixings are design decisions, so follow your designer's specification and the manufacturer's instructions. For cavity details, see cavity wall insulation.
Recticel flat roof boards
Flat roof boards are made for warm roof build-ups, laid over the deck beneath the waterproofing. We stock three: Powerdeck F 100mm (£91.97 for 5 boards, 3.6m²), Powerdeck U 100mm (£97.97 for 5 boards) and Eurodeck 100mm (£243.90 for 4 boards, 11.52m²). The right board depends on your roof system and waterproofing. Follow the membrane supplier's compatibility advice, and see flat roof PIR thickness. Browse roof insulation.
Choosing the thickness
The thickness you need depends on the target U-value, the rest of the build-up and what space you have. As a rough guide from our own thickness guides, a new concrete extension floor targeting 0.18 W/m²K usually needs about 80–100mm of PIR, and a suspended timber floor usually needs 120–140mm. These are guides, not a design, so check the figures for your own floor with Building Control or your designer. The insulation calculator helps you turn thickness and area into a number of sheets.
Because the Eurothane GP range includes odd thicknesses such as 70, 75, 90 and 110mm, you can often reach a target with a single layer instead of two thinner ones. A single layer has fewer joints, which means less cutting and fewer places for heat to leak.
Recticel vs the other PIR makers
PIR boards from different makers often have similar declared performance at the same thickness, so the decision usually comes down to the sizes, price and availability. We compare them in Celotex vs Kingspan vs Recticel. See also our Eurothane GP product overview.
Tips for fitting PIR boards
- Cut with a fine-toothed saw and a straight edge.
- Keep boards dry and off the ground until you fit them.
- Tape or foam the joints where continuity matters, and keep an air gap only where the build-up calls for it.
- Wear a dust mask and gloves when cutting.
- Follow the manufacturer's installation guidance.
Our guides on how to cut PIR board and common installation mistakes help you avoid the usual problems.
Frequently asked questions
What is Recticel Eurothane GP used for?
It is a general purpose PIR board used in floors, walls, ceilings and roofs. It is sold in 2400 × 1200mm sheets.
How thick is Recticel Eurothane GP?
We stock 25, 30, 40, 50, 60, 70, 75, 80, 90, 100, 110, 120, 130, 140 and 150mm.
Is Recticel the same as Celotex or Kingspan?
They are different makers of similar PIR boards. Each publishes its own performance data, so compare datasheets.
Can I use Recticel boards under screed?
PIR boards are commonly used under screed for floors, but the floor build-up, the damp-proof membrane and the screed type need to be right. See our floor insulation guidance, and check with the manufacturer.
Prices are shown ex VAT and vary, so check the product page before you order. Most orders over £400 + VAT are delivered free across England, with delivery to mainland Wales and Scotland too. Mainland Wales and mainland Scotland: Celotex insulation and Knauf loft roll have £40 ex VAT delivery on every order; ceilings have a £400 ex VAT minimum plus £40 ex VAT delivery; British Gypsum plaster and plasterboard have a £400 ex VAT minimum plus £40 ex VAT delivery. We do not deliver to Northern Ireland or the Scottish islands. Insulation and plasterboard orders have a £400 ex VAT minimum and free delivery (see delivery information). Outside England? Call us or contact us for a quote. Call us on 03330 908479 (Mon–Thu 8am–5pm, Fri 8am–12pm), email sales@insulationwarehousedirect.co.uk, or order online.