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56mm Kingspan Thermaroof TR31 Plywood Flat Roof Insulation

56mm Kingspan Thermaroof TR31 PIR Insulated Plywood - Warm Roof (pack of 20)
56mm Kingspan Thermaroof TR31 Plywood Flat Roof Insulation
  • Vapour control layer
  • Pack Coverage: 57.60m2
  • Core Density: 32kg/m3
  • Compressive Strength: 150kPa
  • Thermal Conductivity: 0.022W/mK
Estimated delivery:
In Stock
£ 0.00
Ex VAT: £ 0.00
  • Brand: Kingspan®
  • Model: 56mm TR31
  • Dimensions: 2,400mm x 1,200mm x 56mm
  • SKU: 56mm
  • Product code: P1-700
  • MPN: 56mm-Thermaroof-TR31

Options available

56mm Kingspan Thermaroof TR31 Structural Plywood Insulation for Flat Roof Decking is a high-quality 50mm PIR insulation board bonded to 6mm FSC certified plywood on one side and multilayer foil on the reverse side. 

Kingspan TR31 Composite Structural Flat Roof PIR Board is a 3 in 1 solution designed to provide vapour control layer and decking in one easy applicable product for use on new roofs or upgrading the thermal performance of existing roofs.

Kingspan Thermaroof TR31 is suitable for use with mechanically fixed single-ply waterproofing membranes, mastic asphalt, roll & pour and adhered systems.

It provides a cost effective means of reducing CO2 emissions and for compliance with Building Regulations and Standards.

Kingspan TR31 achieves high performance insulation for warm flat roof structures. 

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

The thermal conductivity (λ-value) of the insulation is 0.022 W/mK.

The thermal conductivity (λ-value) of the plywood is 0.14 W/mK.




Thickness: 56mm

Width: 1200mm

Length: 2400mm

Pack Coverage: 57.60m2

Core Density: 32kg/m3

Thermal Conductivity: 0.022W/mK

R-Value: 2.27m2K/W

Compressive Strength: 150kPa

Water vapour resistivity: 100


Key points:

· High performance rigid thermoset insulation – thermal conductivity 0.022W/m.K

· Insulation, vapour control layer and decking in one board

· Proven reputation as a quality composite roof deck

· Resistant to the passage of water vapour

· Easy to handle and install

· Ideal for new build and refurbishment

· Non–deleterious material

· Manufactured with a blowing agent that has zero ODP and low GDP


Product is not available - Please refer to the listed substitutes:

56mm PlyDeck Xtratherm FR/TP Flat Roof Board Thermal Ply Decking PIR Insulation bonded to 6mm WBP Plywood

59mm OSB Insulation Deck Flat Roof - 50mm Xtratherm PIR Rigid Insulation bonded to 9mm OSB Board - 59mm 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 57.60 m2
Compressive Strength 150kPa
Density 32kg/m3
Length 2400mm
Material Polyisocyanurate PIR ǀ Plywood
Pack Coverage 57.60m2
R-Value 2.27m2K/W
Thermal Conductivity 0.022W/mK
Thickness 56mm
Width 1200mm
Coverage 57.60m2
Finish Foil faced ǀ FSC Plywood
Shipping method Articulated Vehicle
Applications Flat Roof ǀ Hot Bitumen ǀ Decking
ETA Notification Yes
Features Energy savings for buildings
Manufacturer Kingspan Thermaroof®

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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.
56mm Kingspan Thermaroof TR31 PIR Insulated Plywood - Warm Roof (pack of 20)
56mm Kingspan Thermaroof TR31 Plywood Flat Roof Insulation
£ 0.00