Celotex

Celotex is a leading UK insulation manufacturer and offers a variety of insulation products including high-performing PIR insulation boards used in both commercial and residential applications, including floors, walls, ceilings and roofs.

All Celotex insulation boards are high performing in overcoming heat loss and thermal bridging; most boards feature a low-emissivity foil facing, apart from PL4000, which is made by combining plasterboard and PIR insulation. 

They achieve the required U-value, meet all UK building regulations, are BBA-certified and have achieved at least an ‘A’ rating on the BRE Green Guide, which means they’re an eco-friendly solution.

Like most insulation boards, Celotex is fairly easy to install providing you have some DIY experience. If you're unfamiliar with the Celotex range, please see our size and application breakdown below:

Celotex CW4000 Cavity Wall Insulation Board (40mm-100mm) - Used for partially filling cavity walls in external walls

CW4000 insulation is a square-edged PIR (polyisocyanurate) insulation board specifically designed for partially filling cavity walls in external walls. 

• Applications: External wall insulation - partial fill masonry cavity walls. BBA Approved - certificate 16/5343 (Partial Fill Cavity Walls).
• Size: 1200mm x 450mm 
• Available Thicknesses: 40mm, 50mm, 60mm 75mm, 85mm, 100mm
• R-Value: 1.8m².K/W - 4.50m².K/W
• Thermal conductivity: 0.022W/m.K

Celotex Thermaclass Cavity Wall 21 (90mm - 140mm) - Used for full-fill cavity walls

Celotex Thermaclass Cavity Wall 21 offers better thermal performance compared to other Celotex products (0.021W/m.K). It features a tongue and groove edge profile and accommodates up to a 10mm residual cavity for convenient installation and adjustment. 

• Applications: Used in full fill cavity walls; BBA certified – BBA approved – certificate 16/5343
• Size: 1190mm x 450mm
• Available thicknesses: 90mm, 115mm, 140mm
• R-Value: 4.25m².K/W - 6.65m².K/W
• Thermal conductivity: 0.021W/m.K

Celotex PL4000 (37.5mm - 77.5mm) - Used for internal wall lining applications

PL4000 insulation, also known as Celotex insulated plasterboard, is a 2-in-1 time-saving solution combining a PIR insulation board with a paper-faced 12.5mm laminate tapered edge plasterboard into one sheet, ideal for internal wall lining use.

• Applications: Internal wall lining; BBA approved – certificate 16/5357 (Plasterboard Thermal Laminate)
• Size: 1200mm x 2400mm
• Thickness (including 12.5mm plasterboard): 37.5mm, 52.5mm, 62.5mm, 72.5mm, 77.5mm
• R-Value: 1.2m².K/W - 3.00m².K/W
• Thermal conductivity: 0.022W/m.K

Celotex TB4000 (20mm - 40mm) - Used for floor, wall & pitched roof applications

Celotex TB4000 thermal break boards are designed to minimise thermal bridging. They are the thinnest in the Celotex range, with thicknesses ranging from 20mm to 40mm. In pitched roof installations, Celotex 25mm TB4000 boards are sometimes used over the top of wooden trusses to further reduce heat loss.

• Applications: Floor, wall and roof applications; BBA certified – certificate 17/5405 (Pitched Roof, Dry Lining, Floor Insulation)
• Size: 2400mm x 1200mm
• Available thicknesses: 20mm, 25mm, 30mm, 40mm
• R-Value: 0.90m².K/W - 1.80m².K/W
• Thermal conductivity: 0.022W/m.K

GA4000 (50mm-100mm) - General purpose PIR insulation board

Celotex GA4000 is a general-purpose PIR insulation board suitable for pitched roof, walls, dry lining and floor insulation applications. They’re the most popular board, ranging in thickness from Celotex 50mm to Celotex 100mm. For pitched roofs, GA4000 can be used in the middle of the roof floor, complementing TB4000 boards placed around the perimeter.

• Applications: Pitched roof, dry lining and floor insulation. BBA certified – certificate 17/5405 (Pitched Roof, Dry Lining, Floor Insulation).
• Size: 2400mm x 1200mm
• Available thicknesses: 25mm, 30mm, 40mm, 50mm, 60mm, 70mm, 75mm, 80mm, 90mm, 100mm, 110mm, 120mm, 130mm, 140mm, 150mm, 165mm, 200mm
• R-Value: 2.25m².K/W - 4.50m².K/W
• Thermal conductivity: 0.022W/m.K

Celotex XR4000 (110mm- 165mm) - Used for floor, wall & roof applications

Celotex XR4000 is the thickest insulation from Celotex, ranging from 110mm to 165mm. They’re suitable for applications requiring a high level of insulation. For pitched roofs, GA4000 can be installed in the middle of the roof, complementing the TB4000 boards used across the face.

• Applications: Floor, wall and roof applications; BBA certified – certificate 17/5405 (Pitched Roof, Dry Lining, Floor Insulation)
• Size: 2400 x 1200mm
• Thickness: 110mm, 120mm, 130mm, 140mm, 150mm, 165mm
• R-Value: 5.00m².K/W - 9.00m².K/W
• Thermal conductivity: 0.022W/m.K

At National Insulation Supplies, we offer a wide range of high-quality insulation available at bulk discount rates to customers all across the UK. 

We provide bulk discount rates and free delivery on orders above £500, and with an excellent trust pilot rating, plus a secure online payment system, you can shop with confidence when ordering today. 

Need any help with your order or looking to collect? Get in touch with us now at 02030 045 451.