Mannok 125mm PIR Rigid Floor Insulation Board

125mm Mannok Therm Floor / MF is a premium Insulation Board delivering outstanding thermal performance with a fibre-free construction. The product features a rigid thermoset insulation core with low emissivity composite foil facing on both surfaces.

With its robust compressive strength, 125mm Mannok PIR insulation handles floor loads effectively in both new build and refurbishment applications across commercial and domestic properties.

Mannok PIR Insulation Board enhances underfloor heating systems performance significantly. It works particularly well with suspended timber floors, reducing heat loss and air infiltration to improve overall thermal efficiency. This makes it an excellent upgrade option for existing floor systems.

Previously marketed as 125mm Quinn Therm QF, this product maintains the same proven performance standards.

Properties

Manufacturer: Mannok | Quinn Therm

Thickness: 125mm Insulation Board

Length: 2400mm

Width: 1200mm

Dimensions: 2,400mm x 1,200mm x 125mm

Material: Polyisocyanurate (PIR)

R-Value: 5.68 m2K/W

Density: 30-36 kg/m3

Edge: Butt

Thermal Conductivity: 0.022 W/mk

Core water vapour resistivity (MNs/ gm): ≅300

Finish: Aluminium composite foil

Fire Rate: 20 - 55mm Class 1 Euroclass F | 60 - 150mm Class 1 Euroclass E

Core: Fibre free rigid thermoset insulation core

Compressive Strength: 150 kPa

Applications: Roofs, Walls & Floors. Including underfloor heating systems.

Features: General Purpose PIR Insulation Board

Benefits for Pitched Roof Applications

125mm rigid insulation suits pitched roof projects, whether new construction or refurbishment with roof recovery. Its structural capacity spans rafters and manages roof covering loads. Low emissivity facings boost thermal resistance in air spaces, enhancing overall roof performance.

Benefits for Framed Wall Applications

125mm Mannok insulation performs excellently in framed walls for new builds and dry lining in both new and refurbished properties. Low emissivity facings improve cavity thermal performance and reduce wall U-values. Its low thermal conductivity means thinner installations achieve target design U-values.

Benefits for Floor Applications

The 125mm Insulation Board delivers high compressive strength to resist floor loads in commercial and domestic settings. Suitable for new build and refurbishment, it optimises Underfloor Heating System performance and upgrades existing floor thermal efficiency. It minimises heat loss through suspended timber floors and air infiltration. Low thermal conductivity reduces thickness needed for target U-values.

Why Choose Mannok PIR Insulation

125mm Mannok PIR Insulation offers a comprehensive product range for superior quality and performance. Our nationwide distribution and in-house Technical Experts team provide complete project support.

Excellent Performance

Our Floor Insulation products deliver outstanding, durable thermal performance meeting low energy building standards whilst providing exceptional compressive strength.

Sustainability

This product has zero Ozone Depletion Potential (ODP) and Global Warming Potential (GWP) below 5. It holds an A+ BRE Green Guide rating for excellent environmental credentials. Our Environmental Management System meets ISO 14001 certification standards.

Quality Products

Our PIR Insulation products exceed national and European Standard performance requirements. CE marked with BBA and IAB accreditations, they undergo daily quality control testing to European standards.

Info

Browse our Mannok range and filter by thickness or coverage using the left-hand menu. For product suitability advice or quantity discount quotations, contact us on +4402038839057, email sales@insulationbee or use Live Chat for the lowest UK Insulation prices.