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B&Q£570.00Visit shop B&Q - 150mm Kooltherm K103 Floor Insulation Board 2400mm X 1200mm (X2 Boards)
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Kingspan Kooltherm K103 is a premium, high-performance insulation solution designed for contractors and homeowners seeking superior thermal efficiency in ground-floor constructions. It provides excellent energy retention for concrete slabs, screeded floors, and suspended timber systems, though its rigid nature requires precise cutting and careful handling to ensure a flush fit for maximum thermal continuity.
| Model Part Number | K103 |
|---|---|
| Brand | Kingspan |
Yes, its high thermal resistance makes it an excellent choice for use beneath underfloor heating systems to drive heat upward into the room.
The glass-tissue facing provides excellent resistance to water vapour, but the board should not be used in standing water or damp-prone environments without proper damp-proof membranes.
A sharp, fine-toothed hand saw or a dedicated insulation saw is recommended to ensure clean, square cuts.
K103 is specifically designed for floor applications. Please consult Kingspan technical literature for their specific wall and roof insulation product lines.
Yes, K103 must be protected by a suitable floor finish or screed layer and should never be used as a standalone walking surface.
The boards have a minimum compressive strength of 120 kPa, which is sufficient for standard residential and light commercial loads.
Ensure boards are measured and cut with a sharp fine-toothed saw. If the gap is slightly too large, trim the edge incrementally; if too small, use a compatible thermal gap filler.
Small surface nicks to the tissue facing can be repaired with high-quality aluminium foil tape, provided the core remains intact.
For installation, ensure the subfloor is level, dry, and clean to prevent damage to the underside of the insulation. When cutting boards, use a fine-toothed saw to maintain a clean edge and limit dust generation. Ensure all joints are tightly butted together; gaps should be filled with appropriate insulation offcuts or low-expansion polyurethane foam to maintain the integrity of the thermal envelope. The boards should be stored under cover or protected with a waterproof tarp until they are ready to be installed. Avoid walking directly on unprotected insulation boards to prevent surface deformation or puncturing of the glass-tissue facing.
