Celotex PL4000 thermal laminate board Celotex Insulation

Celotex PL4000

High performance rigid Polyisocyanurate (PIR) insulated plasterboard.

Can be easily used to help upgrade to current building regulation standards in pitched roof, flat roof and wall applications.

Ideal option for internal solid wall insulation.

Suitable for both direct bonding (‘dot and dab’) and mechanically fixed installation.

Featuring an inbuilt vapour control layer.

Ideal for new build, retrofit, and refurbishment.

Thicknesses and Availability:

All thicknesses are available from the manufacturer; short lead-times may apply as we may need to get the products in from Celotex before delivering to site.

This PL4000 Range includes the following available product thicknesses: 37.5mm, 52.5mm, 62.5mm, 72.5mm and 77.5mm.

Generally sold in pallet quantities only, however, we will happily check to see if individual depots will split pallets, depending on you requirements.

Product Information

General information about Celotex PL4000

Product Application

Dry-lining thermal laminate board

Celotex's high performance polyisocyanurate (PIR) foam board, PL4000, is suitable for use in dry lining applications as well as the 'underneath' layer in pitched and flat roofs.

Product Make-up


Celotex PL4000 is manufactured from rigid polyisocyanurate (PIR) using a blowing agent that has zero ozone depletion potential (zero ODP) and low global warming potential (GWP).


Faced with a 12.5mm tapered edge gypsum based plasterboard on the front facing while the hidden face is aluminium foil/kraft paper facing, autohesively bonded to the insulation core during manufacture.

Product Properties

Thickness 37.5mm to 77.5mm (including plasterboard)
Board Length 2.4m
Board Width 1.2m
Board Edge Tapered Edge (plasterboard)

Product Prices

Buy Celotex PL4000

Product ex-VAT inc-VAT
Celotex PL4025 37.5mm (25+12.5mm), 26 x 1.2x2.4m = 74.88m² £1,070.79 £1,284.94
Celotex PL4040 52.5mm (40+12.5mm), 22 x 1.2x2.4m = 63.36m² £1,048.93 £1,258.71
Celotex PL4050 62.5mm (50+12.5mm), 18 x 1.2x2.4m = 51.84m² £948.31 £1,137.97
Celotex PL4060 72.5mm (60+12.5mm), 16 x 1.2x2.4m = 46.08m² £895.66 £1,074.79
Celotex PL4065 77.5mm (65+12.5mm), 14 x 1.2x2.4m = 40.32m² £859.99 £1,031.98

Reasonable stock levels are generally held at most of our depots. In some geographic locations, depots may stock alternates, however, we will contact you to discuss before proceeding with the order.

Where products need to be brought in from Celotex, please allow approx. 1 week for delivery.

  • Generally 1 or 3 working days for delivery
  • Generally 1 to 5 working days for delivery
  • Generally 5 to 10 working days for delivery
  • Special request or made to order item, allow extended lead times. Minimum order levels may apply.
  • Please call to check availability and approximate lead times

Product availability depends upon stock levels at closest depot and delivery logistics to geographic locations

Product Performance and Guides

Product Performance, Manufacturer Downloads, and Installation Guides

Product Performance

Thermal Conductivity 0.022 W/mK
Vapour Resistance > 50 MNs/gm
Product Thickness Thermal Resistance kg/m²
Celotex PL4025 37.5mm 1.20 m²K/W 9.99 kg/m²
Celotex PL4040 52.5mm 1.85 m²K/W 10.46 kg/m²
Celotex PL4050 62.5mm 2.30 m²K/W 10.96 kg/m²
Celotex PL4060 72.5mm 2.75 m²K/W 11.31 kg/m²
Celotex PL4065 77.5mm 3.00 m²K/W 11.48 kg/m²

Product Certificates

Please visit the Celotex website for product certificates.