Unilin XT/TL 54.5mm Insulated Plasterboard

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

The 54.5mm Thin-R Thermal Liner XT/TL Insulated Plasterboard (Dot & Dab) is a multi-layer composite panel featuring a 45mm PIR insulation core enclosed by composite kraft facings. These facings are adhered to 9.5mm tapered edge plasterboard using a specialised adhesive bonding system.

Engineered for internal wall installations, this product combines both sides with an integral vapour control layer that minimises condensation risk. By delivering thermal insulation and drylining simultaneously, the Thin-R Thermal Liner streamlines construction and renovation work into a single efficient operation.

Properties

Brand: Unilin

Thickness: 54.5mm

Model: 54.5mm XT/TL Dot&Dab

Dimensions: 2400mm x 1200mm x 54.5mm

Compressive Strength: 150 kPa

Density: 30-32 Kg/m3

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: Composite Kraft facings

Reaction To Fire: Euroclass B s1 d0

Applications: Internal walls ǀ Pitched and flat roofs

Vapour Control Layer: Yes, build in

Fixing method: Adhesive bonding

Features: PIR Thermal Insulated Plasterboard

Type: Thermal Liner®

Flexural Strength: ≥160N Transverse / ≥400N Longitudinal

Benefits

1. Insulation & Drylining in one application
2. Provides effective vapour control layer
3. Reduced insulation thickness
4. Suitable for a variety of wall Insulation types

About

This thermal liner solution delivers comprehensive insulation and drylining in a single installation step, making it the preferred choice for new builds and refurbishment schemes. It enhances your home's energy performance while offering multiple advantages, such as lower heating costs and enhanced 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), ensuring safe application.

Upgrading your home's thermal efficiency delivers substantial benefits, including reduced utility bills and enhanced indoor comfort. Thin-R Thermal Liner is an excellent solution for achieving these improvements and making your property more energy efficient.

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

What are Insulated Plasterboards?

The 54.5mm XT/TL insulated plasterboards (45mm insulation + 9.5mm plasterboard) combine plasterboard with an integrated insulation layer, typically PIR-based, to create a unified, dual-purpose panel. This single component provides both thermal performance and a finished surface ready for decoration. Widely used in construction, these panels enhance thermal and sound insulation while simplifying and accelerating installation timescales. They suit walls, ceilings, and floors, with multiple sizes and thicknesses available to match specific building specifications.

Info

Browse our Unilin range and refine by thickness or coverage using the filters on the left. For guidance on product suitability for your project or to request a bulk discount quotation, contact us by phone on +4402038839057, email sales@insulationbee or use our Live Chat service - Competitive UK Insulation Pricing.