19mm Knauf Plank Tapered Edge Acoustic Plasterboard 2400mm x 600mm

Product Overview

High-density acoustic plasterboard, measuring 19mm in thickness with a tapered edge, for reducing airborne sound transmission in separating walls and floors.

Manufactured with a dense gypsum core, Knauf plank delivers substantial mass, which is essential for improving the acoustic performance of internal systems. 

As part of a multi-layer construction, it acts as a mass layer that increases sound insulation and contributes to quieter, more comfortable internal environments in residential, commercial, and public buildings.

At 19mm thick, the board provides exceptional rigidity and sound-blocking performance, significantly outperforming standard plasterboard thicknesses. 

Its greater density also improves impact resistance, durability, and fire safety, making it a key component in high-performance acoustic partitions and separating floor systems.

The tapered edge profile creates a shallow recess at board joints, designed to accommodate tape and jointing compound. Once filled and finished, the surface becomes seamless and ready for direct decoration.

Features & Benefits

• High-density gypsum core: Adds significant mass to walls and floors, improving airborne sound reduction.
• 19mm thickness: Provides superior acoustic insulation, rigidity, and strength compared with standard boards.
• Improved impact resistance: Greater thickness increases durability in high-traffic areas.
• System integration: Functions as a core mass layer in multi-board wall and floor build-ups for enhanced performance.
• Fire performance: Classified A2-s1, d0 - limited contribution to fire and minimal smoke production.
• Thermal performance: Low thermal conductivity of 0.25 W/mK supports U-value calculations.
• Durable paper face: Provides a stable surface for direct decoration or skim plaster finishes.
• Sustainable choice: Fully recyclable at end of service life.
• Tapered edge profile: Creates a recess at joints, allowing tape and compound to produce a smooth finish ready for decoration.
  
  

Applications

• Separating walls: Improves airborne sound insulation between dwellings or internal spaces.
• Floor systems: Reduces noise transfer between storeys when used within layered floor assemblies.
• Partitions in high-traffic buildings: Adds durability and sound control in schools, offices, and hospitals.
• Multi-layer acoustic systems: Used in combination with insulation and other performance boards for maximum effect.
  
  

Installation Guidance

• Fix with staggered joints: Reduces sound leakage paths and strengthens the system.
• Cut by scoring and snapping: Ensures accurate sizing and clean edges.
• Joint treatment: Finish with Knauf Jointing Compounds and Knauf Paper Joint Tape for a smooth surface.
• Handle in pairs where possible: The increased density makes boards heavier than standard plasterboard.
• Store flat in dry, ventilated conditions: Prevents damage and protects from moisture ingress.
  
  

Compliance & Performance

• Compliance: EN 520, Type A - meets plasterboard standards for strength and durability.
• Reaction to fire: Classified A2-s1, d0 - limited contribution to fire and minimal smoke production.
• Thermal conductivity: 0.25 W/mK - contributes to U-value calculations in wall and floor systems.
• Recyclability: Fully recyclable after use, supporting sustainable construction practices.