112.5mm Unilin XT/TL Insulated Plasterboard

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

The 112.5mm Thin-R Thermal Liner XT/TL Insulated Plasterboard combines a 100mm PIR insulation core with 12.5mm tapered edge plasterboard, bonded together using a proprietary adhesive system. Both sides feature composite kraft facings with an integrated vapour control layer to minimise condensation risk.

Engineered for internal wall applications, this composite panel delivers thermal insulation and drylining in a single installation, making it ideal for new builds and renovation schemes.

Properties

Brand: Unilin

Thickness: 112.5mm

Model: 112.5mm XT/TL Dot&Dab

Dimensions: 2400mm x 1200mm x 112.5mm

Compressive Strength: 150 kPa

Density: 30-32 Kg/m3

Material: PIR core ǀ Gypsum plasterboard

Profile: Tapered edge plasterboard

R-Value: 4.61 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 one step
2. Integrated vapour control layer for condensation prevention
3. Achieves high thermal performance with minimal thickness
4. Versatile solution for multiple wall insulation applications

About

The 112.5mm Thermal Liner XT/TL delivers comprehensive thermal performance and drylining capabilities in a single operation, making it the preferred choice for new construction and refurbishment work. It enhances your home's energy efficiency whilst reducing heating costs 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 performance offers substantial advantages, including lower energy consumption, reduced utility bills, and enhanced comfort levels. Thin-R Thermal Liner represents an effective investment in your property's energy efficiency.

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

What are Insulated Plasterboards?

The 112.5mm XT/TL insulated plasterboards (100mm insulation + 12.5mm plasterboard) are composite building materials that integrate plasterboard with an insulation layer, typically PIR-based. The insulation bonds directly to the plasterboard, creating a single multi-purpose panel that provides both thermal performance and a finished surface. These panels are widely used in construction to enhance thermal and sound insulation, whilst streamlining and accelerating installation. They suit walls, ceilings, and floors in various sizes and thicknesses to meet specific building needs.

Info

Browse our Unilin stock and filter by thickness or coverage using the left-hand navigation. For advice on product suitability for your project or to request a quantity discount quotation, contact us by phone on +4402038839057, email sales@insulationbee, or use Live Chat - Lowest UK Insulation Prices.