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106mm Celotex Insulation TD4000 PIR Plywood Flat Roof Board

106mm Celotex Insulation TD4000 PIR Insulated Plywood - Flat Roof Decking Board (TD4106)
106mm Celotex Insulation TD4000 PIR Plywood Flat Roof Board
  • Vapour Control Layer
  • 5.5mm WBP exterior grade plywood
  • Compressive strength: ≥120kPa
  • Water vapour resistance: >150MNs/g
  • Thermal Conductivity: 0.022W/mK
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£ 0.00
Ex VAT: £ 0.00
  • Brand: Celotex®
  • Model: 106mm TD4000
  • Dimensions: 2,400mm x 1,200mm x 106mm
  • SKU: 106mm
  • Product code: P1-704
  • MPN: TD4106

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106mm Celotex TD4000 (TD4096) PIR Insulated Plywood Flat Roof Board is a 3 in 1 product designed to provide decking, vapour control layer and insulation for new and refurbishment flat roof applications.

Celotex TD4000 2400mm x 1200mm provides a quick and easy way to achieve effective thermally insulated flat roof decks for building structures such as small extensions or garage roofs where there will only be occasional trafficking.

Flat Roof Board Celotex TD4000 comprises a PIR (polyisocyanurate) rigid foam insulation core, with a thermal conductivity of 0.022W/mK, and low emissivity aluminium foil facings on both sides.

TD4000 is 5.5mm WBP exterior grade plywood upper facing bonded to rigid polyisocyanurate foam board, manufactured using zero ozone depletion potential (ODP) blowing agents with low global warming potential (GWP).

Celotex TD4000 provides long term energy savings for building means of reducing CO2 emissions and for compliance with Building Regulations and Standards.

The insulation core and facings resist attack by mould and microbial growth.




Thickness: 106mm

Width: 1200mm

Length: 2400mm

Core Density: 32kg/m3

Thermal Conductivity: 0.022W/mK

R-Value: 4.55m2K/W

Compressive Strength: ≥120kPa

Water vapour resistivity: >150MNs/g

Weight: 6.98 kg/m²

Dimensional stability: BS EN 1604 DS(TH)8


With Celotex TD4000 you are specifying an insulation board that:

 · Is a three-in-one product to provide deck, vapour control layer and insulation.

 · Provides reliable long term energy savings for buildings.

 · Is ideal for use in occasionally trafficked applications.

 · Provides warm roof construction due to over joist installation.

 · Is rapidly installed and weatherproofed.

 · Accepts a wide variety of weathering systems.

 · Is available in a standard board size of 1200mm x 2400mm.



 · Celotex TD4000 is purpose designed for use in light traffic flat roof applications.

 · Ideal for new build and refurbishment.


Product is not available – Please refer to the listed substitute:

106mm PlyDeck Xtratherm FR/TP Flat Roof Board Thermal Ply Decking PIR Insulation bonded to 6mm WBP Plywood

109mm OSB Insulation Deck Flat Roof - 100mm Xtratherm PIR Rigid Insulation bonded to 9mm OSB Board - 109mm overall thickness


*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 

Board covarage 2.88 m2
Compressive Strength ≥120kPa
Density 32kg/m3
Length 2400mm
Material PIR core ǀ 5.5mm WBP Plywood
R-Value 4.55m2K/W
Thermal Conductivity 0.022W/mK
Thickness 106mm
Weight 6.98 kg/m²
Width 1200mm
Finish Foil faced ǀ WBP Plywood
Shipping method Articulated Vehicle
Applications Flat Roof ǀ Hot Bitumen ǀ Decking
ETA Notification Yes
Features Energy savings for buildings
Manufacturer Celotex®

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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.
106mm Celotex Insulation TD4000 PIR Insulated Plywood - Flat Roof Decking Board (TD4106)
106mm Celotex Insulation TD4000 PIR Plywood Flat Roof Board
£ 0.00