Sopratherm XR4120 120mm PIR Board

120mm Sopratherm XR4120 PIR Insulation Board (formerly Celotex XR4000) is a rigid polyisocyanurate (PIR) insulation solution engineered for diverse construction applications. Delivering a thermal conductivity of 0.022 W/mK, this board provides robust thermal resistance whilst minimising heat transfer and enhancing building energy efficiency.

Manufactured by Soprema, the 120mm SOPRATHERM insulation boards feature aluminium foil facings on both sides, optimising thermal performance and functioning as an effective vapour control layer when properly fitted.

SOPRATHERM XR4120 is supplied at 120mm thickness and holds BBA certification for multiple construction scenarios, including:

1. Pitched roof insulation
2. Internal dry lining systems
3. Floor insulation

Pack Size & Coverage

1. Brand: Soprema
2. Product Range: SOPRATHERM XR4120 (formerly Celotex XR4000)
3. Thickness: 120mm
4. Dimensions: 2400 × 1200 mm
5. Board Length: 2400mm
6. Board Width: 1200mm
7. Board Coverage: 2.88m2
8. Pieces Per Pack: 1
9. Thermal Conductivity: 0.022W/mK
10. Thermal resistance (Rd): 5.50 m².K/W
11. Compressive Strength: 120 kPa
12. Density: 31kg/m3
13. Fire Rating: Euroclass F
14. Material: PIR
15. Finishing top: Alu-kraft
16. Finishing bottom: Alu-kraft
17. Edge Profile: Straight
18. Facing: Low Emissivity Foil
19. Aluminium foil surface emissivity: 0.05
20. Weight (kg/m2): 0.79kg/m2
21. BBA certified: Certificate 25/7318 (Pitched Roof, Dry Lining, Floor Insulation)

Sopratherm XR4120 Applications

SOPRATHERM 120mm boards serve multiple construction purposes, offering versatility across numerous building systems. The boards are straightforward to cut and position during installation. Common applications for this 120mm product include:

1. Concrete Slab (Ground Floor)
2. Suspended Timber Joist (Ground Floor)
3. Beam and Block (Ground Floor)
4. Upgrading Existing Concrete Slab (Ground Floor)
5. Timber Frame Internal Linings (External Wall)
6. Timber Frame Sheathing (External Wall)
7. Between Timber Frame Studs (External Wall)
8. Solid Masonry Internal Linings (External Wall)
9. Over Timber Rafters (Pitched Roof)
10. Sarking (Pitched Roof)
11. Below Timber Rafters (Pitched Roof)
12. Between Timber Rafters (Pitched Roof)
13. Loft Insulation – Between and Over Timber Joists (Pitched Roof)
14. Balconies & Terraces Over Joists (Flat Roof)
15. Between Timber Joists (Flat Roof)
16. Below Timber Joists (Flat Roof)

All these applications fall within the scope of BBA Certificate 25/7318, validating product suitability for specified construction methods when installed per manufacturer guidelines.

Fire Performance

SOPRATHERM XR4120 achieves Euroclass F classification under Reaction to Fire testing, assessed to BS EN 13501-1.

In line with current UK Building Regulations on combustibility, this product cannot be used in the external walls of relevant buildings exceeding 11 metres in height.

Compliance and Installation

SOPRATHERM PIR insulation boards must be selected, fitted and detailed according to:

• UK Building Regulations
• Relevant statutory guidance
• Applicable British Standards
• The manufacturer's installation instructions

Proper selection and installation guarantee the insulation functions optimally within the building structure and satisfies all regulatory obligations.

Info

Explore our complete Sopratherm Insulation range. We deliver across the UK Mainland. For guidance on product suitability for your project or to request a bulk quotation, contact us on 02039519012 / 02038839057, email sales@insulationbee.co.uk or use Live Chat - Competitive UK Insulation Pricing.