Celotex PIR Insulation Board GA4000 - 70mm x 2400mm x 1200mm

Name: Celotex PIR Insulation Board GA4000 - 70mm x 2400mm x 1200mm
Brand: Celotex
SKU: gxtxngy33c
Price: 91.03 GBP
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 70mm PIR insulation board is designed for architects, builders, and DIY enthusiasts looking to improve the thermal efficiency of roofs, walls, and floors in both new construction and refurbishment projects. Its primary advantage is high thermal conductivity, allowing for slimmer wall or roof profiles while maintaining superior insulation standards; however, users should note that the rigid boards require precise cutting and handling to ensure tight, gap-free joints for maximum performance.

All features

Model Part Number	GA4070
Brand	Celotex

Extended Product Information

FAQs

Can I use Celotex GA4000 in a flat roof?

Yes, it is suitable for various roof types, but check your specific structural requirements for load-bearing and waterproofing.

Does this board act as a vapor barrier?

The low emissivity foil facing acts as a high-performance vapor barrier when joints are properly sealed with foil tape.

How do I cut these boards?

Use a fine-toothed hand saw. Because the board is rigid, a straight edge or long spirit level is recommended to guide the cut.

Is it safe to touch the insulation core?

PIR insulation is generally safe to handle, but it is recommended to wear gloves and a dust mask when cutting to avoid irritation from dust particles.

What is the primary benefit of the low emissivity foil?

The foil reflects radiant heat back into the building, which improves the overall thermal resistance of the wall or roof cavity.

Troubleshooting

Board does not fit perfectly against joists

Use a sharp, fine-toothed saw to trim the board for a tighter friction fit. Gaps should be filled with expanding foam if they exceed 5mm.

Foil facing is torn during installation

Apply foil tape over the tear to restore the integrity of the vapor barrier and maintain emissivity properties.

Pros and Cons

Pros

Excellent thermal conductivity allows for thinner layers
Lightweight and easy to handle
Versatile use across roofs, walls, and floors
BBA certified for quality assurance
Reduces heat transfer via low emissivity foil

Cons

Requires precise cutting for effective joints
Rigid boards may not be suitable for curved surfaces
Standard board size requires careful transport planning

Setup, Compatibility & Care

Installation Steps

Ensure the substrate is dry, clean, and structurally sound.
Measure the area and mark the boards clearly before cutting with a fine-toothed saw.
Fit the boards edge-to-edge to create continuous thermal coverage. Use mechanical fixings or recommended adhesives as required by the specific application type.
Tape all joints using high-quality foil tape to maintain the integrity of the vapor control layer.

Compatibility

Compatible with most common construction materials including timber frames, masonry, and steel joists. Ensure that any sealant or adhesive used is compatible with the PIR foam core.

Care

Store boards in a dry, covered area off the ground. Avoid prolonged exposure to direct sunlight or moisture during storage to prevent degradation of the foil facing.