Unilin XT/TL 34.5mm Insulated Plasterboard

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

Unilin 34.5mm XT/TL Thermal Liner Insulated Plasterboard (Dot & Dab) combines a 25mm PIR insulation core with composite kraft facings on both sides, bonded to 9.5mm tapered edge plasterboard using a proprietary adhesive system.

Engineered for internal wall applications, this composite panel features an integral vapour control layer built into the kraft facing to minimise condensation risk. The Thin-R Thermal Liner delivers substantial thermal performance alongside drylining in a single installation, making it an excellent choice for new builds and refurbishment schemes.

Properties

Brand: Unilin

Thickness: 34.5mm

Model: 34.5mm XT/TL Dot&Dab

Dimensions: 2400mm x 1200mm x 34.5mm

Compressive Strength: 150 kPa

Density: 30-32 Kg/m3

Material: PIR core ǀ Gypsum plasterboard

Profile: Tapered edge plasterboard

R-Value: 1.20 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. Combined insulation and drylining in one step
2. Integrated vapour control layer for condensation prevention
3. Minimal insulation thickness required
4. Suitable for diverse wall insulation applications

About

The 34.5mm Thermal Liner XT/TL delivers robust thermal insulation and drylining simultaneously, making it the preferred choice for newbuild and refurbishment projects. This solution enhances your home's energy performance whilst reducing heating costs and creating a more comfortable living environment.

The 34.5mm 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 offers substantial advantages, from lower energy bills to enhanced comfort levels. Thin-R Thermal Liner is an effective solution for achieving improved energy performance in your property.

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

What are Insulated Plasterboards?

The 34.5mm XT/TL insulated plasterboards (25mm insulation + 9.5mm plasterboard) are composite building materials that integrate plasterboard with an insulation layer, typically PIR-based. The insulation layer bonds to the plasterboard, creating a single multi-purpose panel offering both thermal performance and a finished surface. These panels are widely used in construction to enhance thermal and sound insulation, whilst streamlining installation. Common applications include walls, ceilings, and floors, with options available in various sizes and thicknesses to meet specific building needs.

Info

Browse our Unilin stock and use the left-hand filters to narrow by thickness or coverage. For product suitability advice or bulk quotations, contact us on +4402038839057, email sales@insulationbee or use Live Chat for competitive UK insulation pricing.