Sopratherm TB4035 35mm PIR Insulation Board

35mm Sopratherm TB4035 PIR Insulation Board (formerly Celotex TB4000) is a premium polyisocyanurate (PIR) rigid board engineered for diverse construction applications. Featuring a thermal conductivity of 0.022 W/mK, this high-performance insulation delivers superior thermal resistance whilst reducing heat loss and enhancing building energy efficiency.

The 35mm Soprema SOPRATHERM insulation boards incorporate aluminium foil facings on both surfaces, which optimise thermal performance and function as an effective vapour control layer when properly installed.

SOPRATHERM TB4035 is supplied in 35mm 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 TB4035 (formerly Celotex TB4000)
3. Thickness: 35mm
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): 1.55 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 TB4035 Applications

SOPRATHERM 35mm boards suit numerous construction applications due to their versatile design. These rigid boards are straightforward to cut and fit into position. Common applications for this 35mm 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)

These applications fall within the scope of BBA Certificate 25/7318, which validates product suitability for specified construction systems when fitted according to manufacturer requirements.

Fire Performance

SOPRATHERM TB4035 achieves Euroclass F classification under Reaction to Fire testing per BS EN 13501-1.

Under 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 specified, installed and detailed in line with:

• UK Building Regulations
• Relevant statutory guidance
• Applicable British Standards

The manufacturer's installation instructions Proper specification and installation guarantee the insulation functions effectively within the building structure and satisfies all regulatory requirements.

Info

Explore our full range of Sopratherm Insulation products. We deliver across the entire UK Mainland. For advice on product suitability for your project or to request a quantity discount quotation, contact us on 02038839057 / 02038839057, email sales@insulationbee.co.uk or use Live Chat - Lowest UK Insulation Prices near me.