120mm Unilin Xtroliner XO/UF PIR Floor Insulation Board delivers outstanding thermal performance for underfloor applications. With a thermal conductivity of just 0.021 W/mK, this floor insulation solution effectively minimises heat loss through your floor structure.
Installing 120mm XO/UF Underfloor insulation significantly improves the U-Value performance of both existing and new flooring systems. Combining lightweight construction with easy installation, this product offers excellent compressive strength and low thermal conductivity, making it an ideal choice for floor insulation projects.
Brand: Unilin
Model: 120mm XO/UF Underfloor
Thickness: 120mm
Length: 2400mm
Width: 1200mm
Pack Coverage: 8.64m2
Dimensions: 2,400mm x 1,200mm x 120mm
Compressive Strength: 150 (kPa)
Material: PIR Insulation (polyisocyanurate)
Inner facing: Foil Facing
Outer facing: Foil Facing
Finish: Robust textured foil
Profile: Square Edge
R-Value: 5.70m2K/W
Thermal Conductivity: 0.021W/mK
Fire Classification: Euroclass C-s2, d0
Applications: Floors ǀ Underfloor Heating
Vapour Control Layer: Yes
Features: Improved Performance ǀ Durable
Manufacturer: Unilin Xtroliner®
Thermal Bridging occurs in localised areas where insulation thickness is significantly reduced compared to adjacent sections. These can be classified as 'Repeating,' 'Random,' or 'Non-Repeating.'
Thermal bridges are measured using linear thermal transmittance, known as PSI (Ψ), measured in W/mK. SAP is the software used to calculate a building's energy rating. Within SAP, thermal bridging effects at junctions are represented by a 'Y-Value.'
120mm Unilin XO/UF provides an efficient floor insulation solution. It combines the strength and thermal properties needed to achieve the high-performance U-Values required by Building Regulations.
Browse our Unilin range and filter by thickness or coverage using the left-hand menu. For product suitability advice or bulk quotations, contact us on +4402038839057, email sales@insulationbee, or use Live Chat for competitive UK Insulation board pricing.












