Your Cart

47.5mm Celotex PL4000 Insulated Plasterboard PIR Thermal Laminate ǀ PL4035

47.5mm Celotex PL4000 PIR Insulated Plasterboard Laminate (35mm PIR board bonded to 12.5mm Plasterboard) PL4035
47.5mm Celotex PL4000 Insulated Plasterboard PIR Thermal Laminate ǀ PL4035
  • Vapour Barrier build in
  • External walls – internal lining
  • Pitched roofs – underneath the rafters
  • Flat roofs – underneath the joists
  • Time saving 2 in 1 solution - insulate and dry line walls
Estimated delivery:
In Stock
£ 80.82
Ex VAT: £ 67.35
  • Brand: Celotex®
  • Model: 47.5mm PL4000
  • Dimensions: 2,400mm x 1,200mm x 47.50mm
  • SKU: 47.5mm
  • Product code: P1-883
  • MPN: 47.5mm Celotex PL4035

Options available

47.5mm Celotex PL4000 Insulated Plasterboard (PL4035) is a high-performance PIR (polyisocyanurate) rigid insulation foam board bonded to 12.5mm tapered edge wallboard that can be used in pitched roofs (underneath the rafters), flat roofs (underneath the joists) and internal wall lining applications.

Celotex PL4035 is a very popular and cost effective thermal laminate board that can be installed using both direct adhesive bonding (dot and dab) and mechanical fixing technique to reduce the heat loss from buildings.

The paper facing on both sides of celotex thermal laminate board incorporates an integral vapour control barier, which helps to reduce the risk of condensation.

Celotex PL4000 is designed to provide high levels of thermal insulation and drylining in one easily applicable product for both newbuild and refurbishment projects.

Energy efficiency of your home can have many benefits, including reduced energy costs and improved living conditions.

Celotex PL4000 is CFC/HCFC free with zero ODP, low GWP and CE marking.

Celotex PL4000 is manufactured in accordance with quality management system ISO 9001 and environmental management system ISO 14001. 

All products must be installed in accordance with guidance issued by Celotex. 

Thermal conductivity of Celotex PIR foam core is 0.022W/mK.

Celotex boards are chemically inert and safe to use.




Thickness: 47.5mm overall (35mm PIR Insulation Board bonded to 12.5mm Plasterboard)

Size: 2400mm x 1200mm

Board coverage: 2.88m2

R-Value: 1.65 m2K/W

Thermal Conductivity: 0.022 W/mk

Density (Foam Core): 30Kg/m3

Compressive Strength: >120 kPa

Water Vapour Resistivity: >100 MNs/gm

Reaction to Fire: Euroclass B-s1, d0


Key points:

 · Insulation and drylining in one product.

 · Provides vapour control barrier.

 · Thermal conductivity of PIR board - 0.022W/mK.

 · Suitable for internal walls.

 · 3 in 1 solution (vapour barrier, insulation and drylining)

 · Suitable for renovation and new build.

 · Easy to install and decorate.

 · Standard size boards - 1200mm x 2400mm.

 · Kraft paper facings.

 · Achieves a BRE Green Guide A+ rating.

 · BBA approved - certificate 16/5357.



 · External walls - internal lining.

 · Pitched roofs - underneath the rafters.

 · Flat roofs - underneath the joists.


Product Benefits:

 · Excellent thermal conductivity (lambda - 0.022W/mK) decreasing the thickness of insulation required to hit the required U-value.

 · Optimizing space in the construction design and helping to reduce the heating and cooling costs within the buildings.

 · Lightweight and easy to install boards are straightforward to handle, fit and transport.

 · BBA certified product has been assessed for it's defined applications and is compliant with the relevant Building Regulations.

 · Time saving solution to insulate and dry line walls or roofs at the same time.



 · BBA Approved (Cert no 16/5357) plasterboard laminate solution.

 · CE Marked (18.DOPPL4000-01) to BS EN 13950.

 · Quality Management Standard – ISO 9001:2015.

 · Environmental Management System – ISO 14001:2015.


Please note, 47.5mm Celotex PL4000 (PL4035) is not available.

We can offer you: 




*Further information may be found in our Downloads section.

Fairly easy access to all PDF files.

Datasheet ǀ Declaration of Performance - DoP ǀ BBA Certificate ǀ Installation Guide ǀ Certificates ǀ Brochure ǀ SPEC Sheet 


*Special Product - Non returnable cancelable.

Board covarage 2.88 m2
Compressive Strength 120 kPa
Density 30Kg/m3
Length 2400mm
Material PIR core ǀ Tapered edge wallboard
R-Value 1.65 m2K/W
Size 2400mm x 1200mm
Thermal Conductivity 0.022 W/mk
Thickness 47.5mm overall
Water Vapour Resistivity 100 MNs/gm
Width 1200mm
Vapour Resistivity 100 MNs/gm
Finish Kraft paper facings
Shipping method Articulated Vehicle
Applications Wall linings ǀ Pitched and flat roofs
Vapour Control Layer Yes, build in
Fixing method Adhesive bonding ǀ Mechanical fixing
ETA Notification Yes
Features Multi-purpose Insulated Plasterboard
Manufacturer Celotex PL4000®

Write a review

Note: HTML is not translated!
Bad Good

We deliver insulation materials to Mainland UK only. Deliveries to Highlands, Northern Ireland, Isle of Wight etc.. might be possible at additional cost.
We offer free delivery on most of the orders above £300 (excluding VAT) (except special products - shipping cost via courier - products marked ''Request A Quote'')

Delivery of some insulation materials might be extended due to the current situation (Covid-19, stock shortages, allocations).
If you need materials quickly please contact us - we will do our best to help you source materials needed.

We do not deliver on weekends and bank holidays. Sometimes we can deliver on Saturdays - please check with us before placing the order.
If you need any further information please contact us tel. 02081910776

We can help to calculate price per m2 or linear meter (one meter in length) cost, please just contact us via phone 02081910776, email or live chat. Alternatively, you can work it out yourself quickly and easily: to get cost per meter square please divide price shown in orange area by ''Required area (m2)'' Example price of £28.80 divided by board coverage 2.88m2 = cost of £10.00 per m2.


No matter whether you choose a local installer or a national company, there’s a few tips to help you find the right installer for your home insulation improvements, such as asking for recommendations and making sure that they’re part of a certification scheme. This makes sure that they have the right skills and standards of workmanship to carry out the installation, and you can be sure that they know exactly what they are doing.


1. Thermal inspection picture in portfolio

It’s worth seeing a installer’s previous work. There’s no harm asking if you can see any properties nearby that they’ve installed insulation in. Best way would be to see Infrared Thermal Imaging Inspections. Thermal cameras spot small, but key changes in temperature in different areas of a house, identifying problematic areas that the human eye never could and some that a visual inspection could only hypothesize.

2. Reviews

Along with checking recommendations and previous work, finding reviews online can often be a great way to find out if they provide a good service or not. However, it’s best not to solely rely on reviews you may find or review websites, as there’s no controlling who writes them.

3. Compare prices

Comparing prices will also ensure companies can’t take advantage of you and give you a fair price. 

4. Word of Mouth

The best way to find a great insulation installer is through recommendations. Make sure you ask friends and family. They will most likely give you their honest opinion and can tell you from first hand experience.


Whether you require a wall, cladding, external wall, loft or floor insulation fitted, you can find and hire your local insulation installers from popular UK web pages. A simple internet search will return thousands of potential installers near your area.



We are the stockist of construction materials and related products for both trade and DIY from most recognizable brands in the UK like Cordek, RCM, Promat, Rockwool, Isover, Celotex, Xtratherm, Ursa, Low-E, Cedral, Kingspan, Dufaylite, British Gypsum, K-rend, Ecotherm, Iko enertherm, Kay-Metzeler, Terrawool to allow you to complete your insulation job on time at competitive prices and the highest standards.


Whether you are a large company or a DIYer, if you need a large amount of insulation materials, we can offer quantity discounts at the best prices. Please contact us and our friendly customer service will try to find the best and cheapest solutions for you. We value your time and we will try to deliver the products as soon as possible at a reasonable price to your construction site or house. The UK's leading insulation supplier near you and your needs. Price List available upon request.
47.5mm Celotex PL4000 PIR Insulated Plasterboard Laminate (35mm PIR board bonded to 12.5mm Plasterboard) PL4035
47.5mm Celotex PL4000 Insulated Plasterboard PIR Thermal Laminate ǀ PL4035
£ 80.82