Celotex Insulation Board - TB4000

Name: Celotex Insulation Board - TB4000
Brand: Celotex
SKU: ec7fnsacrc
Price: 25.50 GBP
Availability: InStock

The Celotex TB4000 is a high-performance polyisocyanurate (PIR) insulation board designed for vers...

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Celotex Green 40Mm Tb4040 Insulation Board - 2.4M X 1.2M Pir

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Product Information

Full details

The Celotex TB4000 is an ideal choice for contractors and DIY enthusiasts looking to enhance the thermal efficiency of floors, walls, and roofs without sacrificing significant interior space. Its primary benefit is a high-performance 0.022W/mK thermal conductivity, which allows for thinner insulation profiles compared to traditional materials; however, users should note that the board requires precise cutting and careful handling to ensure optimal fit within airtight cavities.

All features

Model Part Number	TB4000
Brand	Celotex

Extended Product Information

FAQs

Can I use TB4000 in a roof application?

Yes, it is suitable for pitched and flat roof applications, typically placed between or over rafters.

Does this board provide acoustic insulation?

While it provides some sound dampening properties, it is primarily designed as a high-performance thermal insulator.

How do I cut these boards?

You can use a fine-toothed hand saw or a standard long-blade insulation knife.

Is the foil facing double-sided?

The TB4000 features a low emissivity foil facing designed to optimize thermal performance in cavities.

What is the coverage of one board?

Each board measures 2400mm x 1200mm, providing a total coverage area of 2.88 square meters.

Troubleshooting

Board is difficult to fit into a tight space

Ensure the board is cut 5-10mm smaller than the aperture to allow for slight expansion and easier placement.

Visible gaps between boards

Fill small gaps with expanding foam or use high-quality foil tape to bridge joints and maintain thermal continuity.

Pros and Cons

Pros

High thermal efficiency in a slim profile
Excellent BBA certification and environmental rating
Lightweight and easy to cut for various project requirements
Versatile for use in floor, wall, and roof assemblies

Cons

Requires precise measurements to avoid thermal bridging
Rigid structure can be brittle if mishandled during transport
Standard 2400mm x 1200mm size may require cutting for smaller gaps

Setup, Compatibility & Care

For installation, ensure the substrate is level and dry before fitting the boards. TB4000 can be cut to size using a fine-toothed saw or a sharp insulation knife. When installing in walls, fix the boards between timber studs or against masonry with approved mechanical fasteners or adhesives. To maximize the 'low-e' benefit, avoid puncturing the foil facing unnecessarily. Store boards in a cool, dry place off the ground and keep them covered to prevent moisture absorption and UV degradation before they are fully enclosed in the building envelope.