77.5mm Unilin Thin-R XT/TL-MF Insulated Drylining Board

Unilin Insulation | The new name for Xtratherm Insulation in the UK & Ireland.

The 77.5mm XT/TL-MF Thin-R Thermal Liner (Mechanically Fixed) features a Unilin 65mm PIR insulation layer bonded to 12.5mm tapered edge plasterboard with composite foil facing on both sides. This composite panel delivers thermal insulation and drylining in a single solution, ideal for internal walls, sloped roofs, and ceilings where mechanical fixing is required.

The dual-sided composite foil facing incorporates an integral vapour control layer, reducing condensation risk. The mechanically fixed XT/TL Thermal Liner combines high thermal performance with drylining capability in one operation, making it a practical choice for new builds and renovation work.

Properties

Brand: Unilin

Thickness: 77.5mm overall

Model: 77.5mm XT/TL-MF Drylined

Dimensions: 2,400mm x 1,200mm x 77.5mm

Compressive Strength: 150 kPa

Density: 30-32 Kg/m3

Length: 2400mm

Material: PIR core ǀ Gypsum plasterboard

Profile: Tapered edge plasterboard

R-Value: 3.01 m2K/W

Thermal Conductivity: 0.022 W/mk

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

Benefits

1. Thermal insulation and drylining in a single application
2. Built-in vapour control layer for condensation prevention
3. Reduced overall insulation thickness requirement
4. Suitable for diverse wall insulation applications

About

The 77.5mm Thermal Liner XT/TL-MF delivers thermal insulation and drylining simultaneously, offering an efficient solution for new construction and refurbishment projects. This product enhances your home's energy efficiency, delivering benefits such as lower heating costs and improved comfort levels.

The insulation board is chemically stable and manufactured using a blowing agent with zero Ozone Depletion Potential (ODP) and minimal Global Warming Potential (GWP). Upgrading your home's thermal performance provides substantial advantages, including reduced energy expenses and enhanced living comfort. The XT/TL-MF Thermal Liner is an effective way to improve energy efficiency and reduce your carbon footprint.

The PIR board offers fire resistance through continuous adhesive ribbons, particularly around vulnerable areas such as window and door openings.

What are Insulated Plasterboards?

The 77.5mm XT/TL-MF insulated plasterboards (65mm insulation + 12.5mm plasterboard) combine plasterboard with an integrated insulation layer, typically PIR-based. The insulation bonds to the plasterboard, creating a single multi-functional panel that provides both thermal performance and a finished surface. These boards are widely used in construction to enhance thermal and sound insulation, whilst streamlining installation. Common applications include walls, ceilings, and floors, with various sizes and thicknesses available to match specific building needs.

Info

Browse our Unilin insulation range and filter by thickness or coverage using the left-hand navigation. For project-specific advice or bulk quotations, contact us by phone on +4402038839057, email sales@insulationbee, or use our Live Chat service - Lowest UK Insulation Prices.