Celotex GA4000 General Purpose PIR Insulation Board - GA4000

Name: Celotex GA4000 General Purpose PIR Insulation Board - GA4000
Brand: Celotex
SKU: bke6su63od
Availability: InStock

Celotex GA4000 is an easy to install polyisocyanurate (PIR) insulation board designed for high the...

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Product Information

Full details

The Celotex GA4000 is a versatile polyisocyanurate (PIR) insulation board designed for contractors, architects, and DIY enthusiasts aiming to improve thermal efficiency in residential or commercial buildings. Its primary benefit is a high thermal conductivity of 0.022 W/m.K, which allows for thinner insulation layers to achieve required U-values, effectively saving space while boosting energy performance. However, because it is a rigid board, it requires precise cutting to fit complex or irregular architectural geometries, making it less forgiving than flexible insulation materials like mineral wool.

All features

Model Part Number	GA4000
Brand	Celotex

Extended Product Information

FAQs

Can I use GA4000 in a damp environment?

While the PIR core is resistant to moisture, it is not intended for use in permanently wet areas. Always ensure an appropriate vapor control layer and ventilation are in place.

Does the GA4000 come in different thicknesses?

Yes, Celotex GA4000 is available in a variety of thicknesses to suit different U-value requirements. Check the manufacturer's specification sheet for available sizes.

Is it safe to cut the boards indoors?

It is recommended to cut boards in a well-ventilated area or outdoors to avoid dust inhalation. Always wear a dust mask.

Can this be used for internal wall insulation?

Yes, it is effective for wall applications, provided it is installed in accordance with local building regulations and fire safety requirements.

Do I need to leave a gap between the board and the wall?

If you are utilizing the low-emissivity foil facing to its maximum potential, installing it against a sealed cavity air space can improve performance.

Troubleshooting

Board does not fit snugly in the opening

Trim the board slightly using a straight edge or guide. Fill any remaining small gaps with professional-grade expanding polyurethane foam.

Foil facing is tearing during handling

Repair any significant tears in the foil facing with aluminum foil tape to maintain the integrity of the vapor control layer.

Pros and Cons

Pros

Excellent thermal performance in thin profiles
Lightweight and easy to transport
High structural rigidity
BBA approved for quality assurance
Reduces energy costs by improving building envelope efficiency

Cons

Rigid boards cannot be easily compressed into tight or irregular gaps
Requires precise cutting equipment for accurate fitting
Not suitable for curved or non-planar surfaces

Setup, Compatibility & Care

For installation, measure your target area accurately and use a fine-toothed hand saw or a sharp insulation knife to cut the boards to size. Ensure the substrate is clean, dry, and flat to allow for a snug fit; gaps should be filled with expanding foam or off-cuts to prevent thermal bridging. When handling, wear gloves and eye protection, as board dust can be mildly irritating. Store the boards in a cool, dry place and cover them if kept on-site to protect them from prolonged weather exposure. The board is compatible with most standard building materials, including timber frames, masonry walls, and concrete floors.