42.5mm Unilin XT/TL Insulated Plasterboard

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

42.5mm Thin-R Thermal Liner XT/TL Insulated Plasterboard combines a 30mm PIR insulation core with composite kraft facings and 12.5mm tapered edge plasterboard, bonded using a proprietary adhesive system. This composite panel is engineered for internal wall applications, delivering thermal insulation and drylining in a single installation step.

The kraft facing incorporates an integral vapour control layer to minimise condensation risk. This solution suits both new builds and renovation projects, offering substantial thermal performance alongside a finished internal surface.

Properties

Brand: Unilin

Thickness: 42.5mm

Model: 42.5mm XT/TL Dot&Dab

Dimensions: 2400mm x 1200mm x 42.5mm

Compressive Strength: 150 kPa

Density: 30-32 Kg/m3

Material: PIR core ǀ Gypsum plasterboard

Profile: Tapered edge plasterboard

R-Value: 1.42 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. Combines insulation and drylining in a single operation
2. Integrated vapour control layer for condensation prevention
3. Minimal insulation thickness requirement
4. Versatile application across various wall insulation scenarios

About

The 42.5mm Thermal Liner XT/TL delivers thermal insulation and drylining simultaneously, making it the preferred choice for new construction and refurbishment work. It enhances your home's energy performance whilst reducing heating expenses and creating a more comfortable living environment.

This Insulation Board is chemically stable and manufactured with a blowing agent featuring zero Ozone Depletion Potential (ODP) and minimal Global Warming Potential (GWP).

Upgrading your home's thermal efficiency delivers tangible advantages, including lower utility bills and enhanced comfort levels. Thin-R Thermal Liner represents an effective pathway to achieving superior energy performance in your property.

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

What are Insulated Plasterboards?

The 42.5mm XT/TL insulated plasterboards (comprising 30mm insulation and 12.5mm plasterboard) represent a composite building product that merges plasterboard with an integrated insulation layer, typically PIR-based. The insulation bonds to the plasterboard, creating a unified panel delivering both thermal performance and a finished surface. These products are widely employed in construction to enhance thermal and sound insulation, whilst streamlining installation timescales. Common applications include walls, ceilings, and floors, with options available in multiple sizes and thicknesses to match specific building specifications.

Info

Browse our Unilin range and refine by thickness or coverage using the left-hand filters. For guidance on product suitability or bulk quotations, contact us by phone on +4402038839057, email sales@insulationbee or use Live Chat - Lowest UK Insulation Prices.