Kingspan Thermawall TW50 Cavity Board

Kingspan Thermawall TW50 Cavity Wall Insulation Board

Kingspan Thermawall TW50 is a partial-fill PIR cavity wall insulation board designed for use in masonry cavity wall constructions. With a thermal conductivity of 0.022 W/m·K, it delivers high thermal performance while maintaining a residual cavity for moisture drainage and ventilation.

TW50 is foil-faced on both sides, enhancing thermal resistance and helping reduce heat loss through the external envelope. The board is easy to cut and install, fitting neatly between wall ties with retaining clips for secure placement.

Key Features:

• Thermal conductivity: 0.022 W/m·K

• Application: Partial-fill cavity wall insulation

• Foil-faced both sides for improved thermal efficiency

• Maintains a residual cavity for moisture control

• Lightweight and easy to install between wall ties

• BBA certified and compliant with Part L Building Regulations

Ideal For:

• Brick and block cavity wall constructions

• New build residential and commercial walls

• Projects needing a balance of thermal performance and moisture protection

• Installations where partial-fill systems are required by design

At Insulation UK, we supply Kingspan TW50 cavity boards in a wide range of thicknesses—available with fast UK-wide delivery.