Unilin Insulation | The new name for Xtratherm Insulation in the UK & Ireland.
The 29.5mm XT/TL-MF Thin-R Thermal Liner (Mechanically Fixed) features a Unilin 20mm PIR insulation layer combined with a composite foil facing, bonded to 9.5mm tapered edge plasterboard. This composite panel delivers both insulation and drylining for internal walls, sloped roofs, and ceilings in mechanically fixed applications only.
The 29.5mm Insulated Plasterboard incorporates composite foil facing on both surfaces with an integral vapour control layer to minimise condensation risk. Engineered specifically for mechanical fixing, this Thermal Liner delivers superior thermal performance and drylining in a single installation step, making it ideal for new builds and renovation work.
Brand: Unilin
Thickness: 29.5mm overall
Model: 29.5mm XT/TL-MF Drylined
Dimensions: 2,400mm x 1,200mm x 29.50mm
Compressive Strength: 150 kPa
Density: 30-32 Kg/m3
Length: 2400mm
Material: PIR core ǀ Gypsum plasterboard
Profile: Tapered edge plasterboard
R-Value: 0.96 m2K/W
Thermal Conductivity: 1.10 m2K/W
Vapour Resistivity: 100 MNs/gm
Finish: Foil facing on both sides ǀ Composite Kraft facings
Reaction To Fire: Euroclass B s1 d0
Applications: internal walls, sloped roofs & ceilings - Mechanically Fixed Applications
Vapour Control Layer: Yes, build in
Fixing method: Mechanically Fixed
Features: PIR Thermal Insulated Plasterboard
Type: Thermal Liner®
Flexural Strength: ≥160N Transverse / ≥400N Longitudinal
The 29.5mm Thermal Liner XT/TL-MF delivers comprehensive thermal insulation and drylining in one operation, offering an efficient choice for new construction and refurbishment schemes. It enhances your property's energy performance whilst delivering cost savings and improved comfort levels.
This 29.5mm Insulation Board is chemically stable and safe, manufactured using a blowing agent with zero Ozone Depletion Potential (ODP) and minimal Global Warming Potential (GWP).
Upgrading your home's thermal efficiency offers substantial advantages, including reduced heating bills and enhanced comfort. The Unilin XT/TL-MF Thermal Liner represents a practical solution for achieving these improvements and creating a more energy-efficient living space.
The PIR board also offers fire resistance benefits through continuous adhesive ribbons, particularly around vulnerable areas such as window and door openings.
The 29.5mm XT/TL-MF insulated plasterboards (20mm insulation + 9.5mm plasterboard) combine gypsum plasterboard with an integrated insulation layer, typically PIR-based. The insulation bonds directly to the plasterboard, creating a unified panel that provides both thermal performance and a finished surface. These panels enhance thermal and sound insulation whilst streamlining installation. Commonly fitted in walls, ceilings, and floors, they are available in various dimensions and thicknesses to match specific building needs.
Browse our Unilin stock and refine by thickness or coverage using the filters on the left. For advice on product suitability for your project or to request a bulk quotation, contact us on +4402038839057, email sales@insulationbee, or use Live Chat for the best UK insulation prices.











