Kingspan K118 Insulated Plasterboard

Kingspan Kooltherm K118 Insulated Plasterboard

Kingspan Kooltherm K118 is a premium internal wall insulation board that combines high-performance phenolic insulation with a 12.5mm tapered edge plasterboard in one convenient panel. Designed to deliver excellent thermal efficiency and speed up installation, K118 is ideal for refurbishing solid walls or enhancing thermal performance from the inside.

Each board includes an integrated vapour control layer, helping to manage condensation risk while maintaining airtightness. With thermal conductivities as low as 0.019 W/m·K, K118 supports compliance with Part L of the Building Regulations in both residential and commercial settings.

Key Features:

• Composite board: Phenolic insulation + 12.5mm plasterboard

• Thermal conductivity: 0.019 W/m·K

• Built-in vapour control layer for moisture management

• Foil-faced phenolic core for superior insulation

• Ideal for solid masonry or timber frame walls

• Quick to install, saves on space and materials

Ideal For:

• Internal solid wall insulation in retrofit projects

• Room upgrades where space-saving insulation is needed

• Properties requiring improved U-values without external cladding

• Meeting energy efficiency targets for low-energy renovations

At Insulation UK, we stock Kingspan K118 insulated plasterboard in various thicknesses—available now for fast delivery across the UK.