Celotex Insulated Plasterboard PL4000

What Is Celotex Insulated Plasterboard?

Celotex PL4000 is a high-performance insulated plasterboard that integrates polyisocyanurate (PIR) insulation with a 12.5mm tapered-edge plasterboard, offering both insulation and dry lining in a single, efficient solution.

The PIR insulation delivers outstanding thermal efficiency, enhancing energy performance and indoor comfort, while the plasterboard provides a smooth, ready-to-decorate surface for painting or further finishing.

Perfect for new builds, refurbishments, and retrofit projects, Celotex PL4000 is designed for applications that demand both high-performance insulation and a flawless interior finish. By combining two essential building materials into one, it streamlines the construction process while reducing both labour time and material costs.

Key Features 

• High Thermal Efficiency: Achieves excellent insulation values with minimal thickness.
• Two-in-One Solution: PIR insulation bonded to plasterboard, eliminating the need for separate insulation and drylining.
• Easy Installation: Can be mechanically fixed or dot-and-dabbed onto walls.
• Vapour Control Layer: Helps reduce condensation risks.
• Range of Thicknesses: Available in various sizes to meet different insulation requirements

Tapered Edge

PL4000's tapered edge provides a precise and seamless fit into various structural elements such as joists, frames, and rafters.

This precision-engineered design not only simplifies the installation process but also ensures a smooth, professional finish, reducing the need for excessive jointing or finishing work.

Versatile Fixing Methods

Depending on the application, PL4000 can be fitted using two widely used methods: dot and dab (drylining) or mechanical fixings.

• Dot and Dab (Drylining) - Fast & Effective
• One of the most common installation methods is dot and dab, also known as drylining. This technique involves applying evenly spaced adhesive ‘dots and dabs’ directly onto a concrete or blockwork wall. Dot and dab is favoured for its efficiency, ease of application, and ability to create a level surface for finishing.
• Mechanical Fixings - Secure & Durable
• For enhanced structural stability, mechanical fixings provide a robust alternative. This method involves securing the plasterboard with galvanised mechanical anchors featuring concave heads, ensuring a strong and lasting hold. Mechanical fixings are particularly beneficial in high-moisture environments or areas requiring additional durability. A variety of fixings are available to suit different substrates and load-bearing requirements.

PL400 Thicknesses

The total thickness of Celotex PL4000 varies based on the insulation layer, offering options for different levels of thermal efficiency:

• 25mm + 12.5mm plasterboard (Total: 37.5mm)
• 40mm + 12.5mm plasterboard (Total: 52.5mm)
• 50mm + 12.5mm plasterboard (Total: 62.5mm)
• 60mm + 12.5mm plasterboard (Total: 72.5mm)