Description

Kooltherm K5 External Wall Board

A premium performance insulation with a fibre-free rigid thermoset phenolic core, it is suitable for use behind traditional and lightweight polymer modified renders.

Fire Rating

Euroclass C-s2, d0

Kingspan Kooltherm thermal conductivity

Application

• Solid brick wall
• Solid block wall
• Cavity block wall
• Cavity brick wall
• Cavity dense block wall

Technical Specifications Of Kooltherm K5 Insulation Board

Kooltherm K5 insulation board is a premium performance insulation choice for external insulation work on masonry walls. To support informed decisions, the key points of kingspan kooltherm k5 external wall products can be grouped into the most important technical areas.

Core specifications:

• A rigid phenolic core that delivers strong thermal performance across a wide insulation thickness range
• Thermal conductivity of 0.022 W/mK for 25 mm to 44 mm and 0.021 W/mK for 45 mm and above
• A Euroclass C s2 d0 fire rating for the kooltherm k5 external wall range

Product sizing and build quality:

• Standard 1200mm x 600mm insulation boards suitable for external wall use
• A glass tissue facing on both sides to support bonding in external wall insulation systems
• Manufactured to quality management systems supporting consistent results across all construction products

Kooltherm K5 insulation board is designed for external wall insulation ewi setups where strong thermal performance is needed without compromising internal space. It remains suitable for use behind traditional and lightweight polymer modified renders as part of refurbishment projects or new masonry walls.

Features And Applications Of K5 External Wall Insulation Board

Kingspan kooltherm k5 external wall products are recognised for their lightweight insulation design and their ability to support external wall insulation work across a wide project range. The following points highlight the main advantages and uses for these insulation materials.

Key features:

• A rigid insulation board that offers strong thermal performance for external wall insulation systems
• Helps reduce heat loss by forming a continuous insulated layer across the external wall
• Suitable for use behind traditional and lightweight polymer modified renders in thin coat finishes

Application uses:

• Effective for external insulation on existing buildings and retrofitting projects carried out externally to existing properties
• Works on solid brick, solid block, cavity brick, and cavity block walls
• A practical option where extremely thin wall constructions or retaining internal space is a priority

Kooltherm K5 insulation boards offer an ideal solution for projects that require reliable thermal performance without altering internal layouts. They can be retrofitted externally to existing properties without disturbing occupants, improving energy efficiency while meeting building regulations for external wall applications.

Installation Tips For Kingspan Insulation Board

Kooltherm K5 External Wall boards should be installed in line with manufacturer guidance to achieve consistent results. Preparations begin with a clean substrate that is ready to support the insulation layer without gaps or moisture issues.

During installation, boards should be placed in a staggered pattern to limit thermal bridging and support stable adhesion. Fixings are added once the adhesive has set, with suitable patterns applied to secure each board firmly. This approach helps maintain alignment across the external wall and supports long-term performance.

Final steps involve applying a suitable basecoat with mesh to reinforce the surface before any thin coat or lightweight polymer modified renders are applied. These installation practices help the insulation materials work effectively across many wall types in both new and existing properties.