Phenolic Wall Insulation

Phenolic Wall Insulation Boards

Phenolic wall insulation offers some of the lowest thermal conductivity values available, making it ideal for achieving slim wall profiles without compromising on energy performance. Made from rigid phenolic foam and typically faced with low-emissivity foil or composite layers, these boards deliver excellent thermal efficiency, fire performance, and moisture resistance.

At Insulation UK, we stock a wide range of phenolic insulation boards from Kingspan's Kooltherm range, suitable for use across multiple wall types. Whether you're working on a cavity wall, solid wall, timber/steel frame, or internal wall upgrade, phenolic insulation provides an ideal solution for meeting Part L Building Regulations while maximising usable floor space.

Phenolic Wall Insulation Applications:

• Cavity Walls – Kingspan K106 & K108
  Full fill and partial fill solutions with ultra-low thermal conductivity for masonry cavity wall applications.

• Timber and Steel Frame Walls – Kingspan K112 Framing Board
  High-performance board for installation between or over framing studs, ideal for internal and external applications.

• Solid or External Walls – Kingspan K5 External Wall Board
  Designed for use with external wall insulation systems under render or cladding.

• Internal Walls & Dry Lining – Kingspan K118 Insulated Plasterboard
  A 2-in-1 solution combining phenolic insulation and plasterboard for internal thermal upgrades.

Why Choose Phenolic Insulation for Walls?

• Outstanding thermal conductivity – as low as 0.018 W/m·K

• Suitable for full fill, partial fill, internal & external wall types

• Slim-profile boards ideal for space-conscious projects

• BBA certified and compliant with UK Building Regulations

• Manufactured by industry leaders such as Kingspan

At Insulation UK, we supply Kingspan Kooltherm phenolic wall insulation in a wide range of thicknesses for fast, reliable UK-wide delivery.