54.5mm Unilin Thin-R XT/TL-MF Insulated Drylining Board

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

The 54.5mm XT/TL-MF Thin-R Thermal Liner (Mechanically Fixed) combines a Unilin 45mm PIR insulation layer with a composite foil facing, bonded to 9.5mm tapered edge plasterboard. This composite panel delivers both thermal insulation and drylining in a single product, making it ideal for internal walls, sloped roofs, and ceilings where mechanical fixing is required.

The 54.5mm Insulated Plasterboard features composite foil facing on both sides with an integral vapour control layer built in, helping to minimise condensation risk. Designed for mechanical fixing applications, the XT/TL Thermal Liner delivers substantial thermal performance and drylining capability in a single operation, making it the go-to choice for new builds and renovation work.

Properties

Brand: Unilin

Thickness: 54.5mm overall

Model: 54.5mm XT/TL-MF Drylined

Dimensions: 2,400mm x 1,200mm x 54.5mm

Compressive Strength: 150 kPa

Density: 30-32 Kg/m3

Length: 2400mm

Material: PIR core ǀ Gypsum plasterboard

Profile: Tapered edge plasterboard

R-Value: 2.10 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. Insulation and drylining combined in one application
2. Integrated vapour control layer for condensation protection
3. Thinner overall construction depth
4. Versatile for multiple wall insulation applications

About

The 54.5mm Thermal Liner XT/TL-MF delivers high-performance thermal insulation and drylining in a single operation, offering a practical solution for new construction and refurbishment schemes. This product enhances your home's energy efficiency whilst reducing installation time and labour costs.

The 54.5mm Insulation Board is chemically stable and manufactured with a blowing agent featuring zero Ozone Depletion Potential (ODP) and minimal Global Warming Potential (GWP), making it an environmentally responsible choice.

Upgrading your home's thermal performance delivers tangible advantages, from lower heating bills to enhanced comfort levels. The Unilin XT/TL-MF Thermal Liner represents an effective investment in energy efficiency and living standards.

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

What are Insulated Plasterboards?

The 54.5mm XT/TL-MF insulated plasterboards (45mm insulation + 9.5mm plasterboard) are composite building materials that integrate plasterboard with an insulation layer, typically PIR-based. The insulation core bonds to the plasterboard, creating a multi-purpose panel offering both thermal performance and a finished surface. These panels improve thermal and sound insulation whilst streamlining installation. Commonly fitted in walls, ceilings, and floors, they come in various sizes and thicknesses to match specific building needs.

Info

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 - Lowest UK Insulation Prices.