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102.5mm Xtratherm XT/TL-MF Mech Fix Insulated Plasterboard (Unilin)

102.5mm Xtratherm XT/TL-MF Mechanical Fix Thermal Laminate - Wall Roof Ceiling - 90mm PIR bonded to 12.5mm Plasterboard
102.5mm Xtratherm XT/TL-MF Mechanical Fix Thermal Laminate - Wall Roof Ceiling - 90mm PIR bonded to 12.5mm Plasterboard
102.5mm Xtratherm XT/TL-MF Mechanical Fix Thermal Laminate - Wall Roof Ceiling - 90mm PIR bonded to 12.5mm Plasterboard
102.5mm Xtratherm XT/TL-MF Mechanical Fix Thermal Laminate - Wall Roof Ceiling - 90mm PIR bonded to 12.5mm Plasterboard
102.5mm Xtratherm XT/TL-MF Mech Fix Insulated Plasterboard (Unilin)
  • Provides Effective Vapour Control Layer
  • Reducing Energy Consumption and Costs
  • For a Variety of Wall Types - Internal Walls, Sloped Roofs, Ceilings
  • Insulation & Drylining in one Application - Refurbishment & New Build
  • XT/TL-MF is only suitable for mechanically fixed applications
Estimated delivery:
In Stock
£ 116.02
Ex VAT: £ 96.68
  • Brand: Xtratherm®
  • Model: 102.5mm XT/TL Mechanically Fixed
  • Dimensions: 2,400mm x 1,200mm x 102.50mm
  • SKU: 102.5mm
  • Product code: P1-856
  • MPN: 102.5mm XT/TL-MF Mech-Fix

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102.5mm Xtratherm XT/TL-MF Thermal Liner Mech Fix Insulated Plasterboard is made up of 90mm PIR insulation core bonded to 12.5mm plasterboard designed to provide high levels of thermal insulation and vapour barrier for walls and ceilings.

Xtratherm XT/TL-MF Mechanically Fixed Unilin Board is a highly versatile and durable thermal insulated plasterboard designed to save money and time by reducing the heat loss from buildings in roof, wall and ceiling applications.

The composite foil facings on both sides of the XT/TL-MF thermal laminate dry lining board incorporates an integral vapour control layer, which helps to reduce the risk of condensation and improve thermal performance.

Xtratherm Thin-r XT/TL-MF Thermal Liner Mech Fix improves energy efficiency of your home and has many benefits, including reduced energy costs and improved living conditions in both newbuild and refurbishment projects.

XT/TL-MF Mechanically Fixed Board is chemically inert and safe to use manufactured with a blowing agent that has zero Ozone Depletion Potential (ODP) and low Global Warming Potential (GWP).

Insulated Plasterboard Thin-R XT/TL-MF must be installed in accordance with guidance issued by Xtratherm.

XT/TL-MF Thin-R Xtratherm Thermaliner Drywall Boards are chemically inert and safe to use.

Lightweight and easy to install Thermal Liner XT/TL-MF Drylining Boards are straightforward to handle, fit and transport.

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

Thermal conductivity of plasterboard is 0.17W/mK.




Thickness: 102.5mm overall (90mm PIR Insulation Board bonded to 12.5mm Plasterboard) – Mechanically Fixed

Size: 2400mm x 1200mm

Board coverage: 2.88m2

R-Value: 4.15 m2K/W

Thermal Conductivity: 0.022 W/mk

Density (Foam Core): 30-32 Kg/m3

Compressive Strength: >150 kPa

Water Vapour Resistivity: >100 MNs/gm

Reaction to Fire: Euroclass B s1 d0


Key points:

 · Insulation and drylining in one easy applicable product.

 · Provides effective Vapour Control Layer (VCL).

 · Thermal conductivity of PIR core as low as 0.022W/mK.

 · Reduced insulation thickness.

 · Helps to reduce the risk of condensation.

 · Suitable for a variety of wall types.

 · Cost effective 3 in 1 solution. 

 · Suitable for refurbishment and new build.

 · Improving living conditions.

 · Easy to install and decorate.


Handling, Cutting and Storage:

 · Xtratherm insulation should be stored off the ground, on a clean flat surface and must be stored under cover. 

 · The polythene wrapping is not considered adequate protection for outside exposure. 

 · Care should be taken to protect the insulation in storage and during the build process.

 · The insulation boards can be readily cut using a sharp knife or fine toothed saw. 

 · Ensure tight fitting of the insulation boards to achieve continuity of insulation as asked for within the ACDs.

 · Appropriate PPE should be worn when handling insulation.



 · Xtratherm products are stable, rot proof and will remain effective for the life span of the building, dependent on specification and installation. 

 · Care should be taken to avoid contact with acids, petrol, alkalis and mineral oil, when contact is made, clean materials in a safe manner before installation.


Installation guideline step by step:

1. Ensure the wall is dry, clean and free of protrusions. 

Any existing wallpaper should be removed.

2. Fix metal frame system or timber battens to the wall in accordance with the manufacturer’s instructions. 

Sections should be placed around all wall edges and around openings and services.

3. Fix the metal frame system or vertical timber battens at a maximum of 600mm centers. 

(incorporating a vertical DPC behind timber battens). 

Ensure framing system or battens are wide enough to offer 20mm support to all four edges of the plasterboard. 

Pack battens if necessary to level the wall. 

Extra noggins may be required when the XT/TL-MF is unsupported by the battens.

4. Lift the XT/TL-MF into position using wedges on the floor. 

Insulation should be cut back to accommodate an adjoining panel at external corners. 

Joints should be tightly butted.

5. Fix XT/TL-MF to the frame at 300mm centres using appropriate fixings eg. drywall screws, at least 12mm in from the board edge. 

The fixings should penetrate at least 25mm into the timber batten.

Fixings should be thermally broken where possible. 

6. Seal and tape the joints of XT/TL-MF to ensure a continuous vapour control layer is created. 

Fill any gaps with foam filler.

7. Plaster skim to finish.

When upgrading existing properties, a professional should be engaged to assess the property for appropriate insulation treatments and effective detailing. 

Walls should be dry and decoration stripped back to the wall substrate. 

Appropriate ventilation strategies must be considered as part of the overall energy upgrade.



Guidance in PAS2030:2017 ‘Specification for the installation of energy efficiency measures.

(EEM) in existing buildings and BS8212 Code of practice for dry lining and partitions should be consulted.


*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 150 kPa
Density 30-32 Kg/m3
Length 2400mm
Material PIR core ǀ Gypsum plasterboard
R-Value 4.15 m2K/W
Size 2400mm x 1200mm
Thermal Conductivity 0.022 W/mk
Thickness 102.5mm overall
Water Vapour Resistivity 100 MNs/gm
Width 1200mm
Vapour Resistivity 100 MNs/gm
Finish Foil facing ǀ Kraft facing
Shipping method Articulated Vehicle ǀ Courier
Applications Internal walls ǀ Sloped roofs ǀ Ceilings
Vapour Control Layer Yes, build in
Fixing method Mechanically Fixed
ETA Notification Yes
Features Thermal Liner ǀ Insulated Plasterboard
Manufacturer Xtratherm Thermal-Liner®

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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.
102.5mm Xtratherm XT/TL-MF Mechanical Fix Thermal Laminate - Wall Roof Ceiling - 90mm PIR bonded to 12.5mm Plasterboard
102.5mm Xtratherm XT/TL-MF Mech Fix Insulated Plasterboard (Unilin)
£ 116.02