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52.5mm XT/TL-MR Thermaline Moisture Resistant Insulated Plasterboard

52.5mm Xtratherm XT/TL-MR PIR Insulation Drylining Dot and Dab - 40mm PIR bonded to 12.5mm Moisture Resistant Plasterboard
52.5mm Xtratherm XT/TL-MR PIR Insulation Drylining Dot and Dab - 40mm PIR bonded to 12.5mm Moisture Resistant Plasterboard
52.5mm Xtratherm XT/TL-MR PIR Insulation Drylining Dot and Dab - 40mm PIR bonded to 12.5mm Moisture Resistant Plasterboard
52.5mm Xtratherm XT/TL-MR PIR Insulation Drylining Dot and Dab - 40mm PIR bonded to 12.5mm Moisture Resistant Plasterboard
52.5mm XT/TL-MR Thermaline Moisture Resistant Insulated Plasterboard
  • Provides Effective Vapour Control Layer
  • Improving Moisture Resistance and Thermal Performance
  • Applications: Kitchen and Bathroom Walls and Ceiling Installations...
  • Insulation & Drylining in one Application - Refurbishment & New Build
  • Strong Moisture Resistant Paperliners - Water Repellent
Estimated delivery:
In Stock
£ 118.15
Ex VAT: £ 98.46
  • Brand: Xtratherm®
  • Model: 52.5mm XT/TL MR
  • Dimensions: 2,400mm x 1,200mm x 52.50mm
  • SKU: 52.5mm
  • Product code: P1-866
  • MPN: 52.5mm XT/TL-MR Moisture Resistant

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52.5mm Xtratherm XT/TL-MR Moisture Resistant Insulated Plasterboard is designed for internal building areas of high humidity conditions, ideal for receiving a plaster finish or for direct decoration.

XT/TL-MR Thermal Liner Thin-R is designed to improve moisture resistance and thermal performance by reducing effects of moisture and heat loss from buildings in kitchens, bathrooms, toilets, walls and ceilings.

Moisture resistant insulated plasterboard is especially applicable to room-in-the-roof and refurbishment applications, wherever improving moisture resistance and thermal performance is of relevance.

Xtratherm Thin-R XT/TL-MR is a versatile and durable insulated plasterboard offering strong moisture resistant paper-liners (water repellent) for use as an internal lining material for walls and ceilings.

Thermaline PIR MR Moisture Resistant Board improves energy efficiency of your home and has many benefits, including reduced energy costs and improved living conditions in both newbuild and refurbishment projects.

The composite foil facings on both sides of the XT/TL-MR thermal liner board incorporates an integral vapour control layer, which helps to reduce the risk of condensation.

Thin-R Xtratherm Thermaliner XT/TL-MR Drywall 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).

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

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

Thermal conductivity of moisture resistant plasterboard is 0.19W/mK.




Thickness: 52.5mm overall (40mm PIR Insulation Board bonded to 12.5mm Moisture Resistant Plasterboard) – MR

Size: 2400mm x 1200mm

Board coverage: 2.88m2

R-Value: 1.90 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:

 · Improving moisture resistance and thermal performance.

 · Applications: kitchen and bathroom, walls and ceilings.

 · Strong moisture resistant paperliners - water repellent.

 · 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 and free from any protrusions / wall paper etc.

2. Mark the position of XT/TL-MR on the wall. 

Setting out and planning board positioning is essential.

3. Apply adhesive dabs to the wall in accordance with BS8212, ensuring a 50mm continuous ribbon of adhesive is created at the top and bottom of each board and around all openings. 

Follow adhesive manufacturer’s guidelines.

General recommendation is to apply vertical dabs at 300mm centres, 25mm in from the edge. 

Dabs should be 50-75mm wide and approximately 25mm deep to allow for tamping. 

Total contact with board area should be minimum 20%. 

Maximum height installation for this system is 3m.

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

5. Align XT/TL-MR squarely on wall. 

Apply pressure to the board to level and embed it into the adhesive. 

Allow a 15mm expansion joint at the top and bottom of the panel, and fill with foam filler. 

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

Joints should be tightly butted.

6. When the adhesive has dried, 3 mechanical fixings (thermally broken) should be fixed through the centre of the board.

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

8. 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.


Special product - non returnable / cancellable.


Board covarage 2.88 m2
Compressive Strength 150 kPa
Density 30-32 Kg/m3
Length 2400mm
Material PIR ǀ Moisture resistant plasterboard
R-Value 1.90 m2K/W
Size 2400mm x 1200mm
Thermal Conductivity 0.022 W/mk
Thickness 52.5mm overall
Water Vapour Resistivity 100 MNs/gm
Width 1200mm
Vapour Resistivity 100 MNs/gm
Finish Composite Kraft facings
Shipping method Articulated Vehicle ǀ Courier
Applications Kitchen ǀ Bathroom ǀ Walls ǀ Ceilings
Vapour Control Layer Yes, build in
Fixing method Adhesive bonding ǀ Dot and Dab
ETA Notification Yes
Features Moisture Resistant Insulated Plasterboard
Manufacturer Xtratherm MR 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.
52.5mm Xtratherm XT/TL-MR PIR Insulation Drylining Dot and Dab - 40mm PIR bonded to 12.5mm Moisture Resistant Plasterboard
52.5mm XT/TL-MR Thermaline Moisture Resistant Insulated Plasterboard
£ 118.15