120mm Kingspan Thermafloor TF70 delivers outstanding thermal performance as a floor insulation board, with a thermal conductivity rating of 0.022 W/mK. This insulation board works effectively on both solid and suspended floor systems, making it ideal for new builds and refurbishment work alike. The 120mm boards are straightforward to cut and position, speeding up installation times. Multiple thickness options are available to match your specific project needs.
Among the most thermally efficient 120mm floor insulation boards, this lightweight product offers excellent transportability and ease of installation. It integrates seamlessly with most underfloor heating arrangements, potentially lowering expenses on associated work such as ground preparation and service routing.
Brand: Kingspan
Thickness: 120mm
Length: 2400mm
Width: 1200mm
Weight: 1.84kg | Thermafloor TF70 has an approximate weight of 3.50 kg/m2 at a thickness of 120 mm.
Model: 120mm Thermapitch TF70
Dimensions: 2,400mm x 1,200mm x 120mm
Compressive Strength: The compressive strength typically exceeds 140 kPa at 10% compression.
Density: 32 Kg/m3
Length: 2400mm
Material: Polyisocyanurate (Kingspan PIR Insulation)
R-Value: 5.45m2K/W
Size: 1200mm x 2400mm
Thermal Conductivity: 0.022 W/mk
Finish: 120mm TF70 is faced on both sides with a low emissivity composite foil, autohesively bonded to the insulation core during manufacture.
Applications: High performance floor insulation.
Fire Resistance: Under System 4 AVCP, 120mm Thermafloor TF70 has a Euroclass rating of F.
Water vapour resistance: 110 MNs/g
BBA Certified: Yes, No. 14/5133
Features: Improves the Thermal Resistance | Unaffected by air infiltration | Resistant to the passage of water vapour
This 120mm insulation suits a broad spectrum of floor types, from solid concrete bases to beam and block construction, suspended timber ground floors, and timber joisted systems.
The manufacturing process bonds Kingspan 120mm PIR with a low emissivity composite foil on both surfaces, creating a reflective layer that boosts thermal resistance in unventilated cavities adjacent to the board.
The 120mm Kingspan Thermafloor TF70 core utilises Nilflam® technology, a premium fibre-free rigid thermoset polyisocyanurate (PIR) material. Production employs a blowing agent with zero Ozone Depletion Potential (ODP) and minimal Global Warming Potential (GWP).
Testing to BS EN 826:2013 (Thermal insulating products for building applications. Determination of compression behavior) demonstrates that 120mm Kingspan PIR insulation typically achieves compressive strength exceeding 150 kPa at 10% compression.
Under BS EN 12086:2013 (Thermal insulating products for building applications. Determination of water vapor transmission properties) assessment, this product routinely demonstrates water vapour resistance well above 100 MNs/g.
The longevity of 120mm TF70 Floor Insulation relies on correct installation, adequate structural support, and proper use conditions. When properly fitted, the product can perform effectively for many decades.
120mm Kingspan Insulation TF70 achieves an F Euroclass rating under System 4 AVCP. When installed in pitched roof applications beneath appropriate roof coverings, it satisfies national standards for external fire exposure.
Browse our full Kingspan range and narrow results by thickness or coverage using the filters on the left. For advice on product suitability for your application, or to request a bulk discount quote, contact us on +4402038839057, email sales@insulationbee or use Live Chat - Lowest UK Insulation Prices.
















