Delivery Area Please Check Before OrderingThis product is only available for delivery to the postcode areas listed below.ALCBEHAENNWSGUBWDNCM17CM24HP1HP4IP24IP29LU1LU6MK (except MK18)PE1PE8PE19PE26PE29Stock Clearance - Limited AvailabilityThis product is supplied as a pallet of 15 Celotex GA4000 insulation boards, each measuring 2400mm x...
Delivery Area Please Check Before Ordering
This product is only available for delivery to the postcode areas listed below.
| AL | CB | E | HA |
| EN | NW | SG | UB |
| WD | N | CM17CM24 | HP1HP4 |
| IP24IP29 | LU1LU6 | MK (except MK18) | PE1PE8 |
| PE19 | PE26PE29 |
Stock Clearance – Limited Availability
This product is supplied as a pallet of 15 Celotex GA4000 insulation boards, each measuring 2400mm x 1200mm x 75mm.
Celotex GA4000 is a high-performance, general-purpose PIR insulation board suitable for a wide range of floor, wall and roof applications. At 75mm thick, it provides excellent thermal performance while remaining straightforward to incorporate into a variety of construction build-ups.
The boards can be used in applications including pitched and flat roofs, concrete slab floors, suspended timber floors, cavity walls, internal wall linings and external wall sheathing. Celotex GA4000 features low-emissivity foil facings on both sides, helping to enhance thermal performance when incorporated into an appropriately designed construction.
Manufactured from rigid polyisocyanurate (PIR), Celotex GA4000 provides a low thermal conductivity of 0.022 W/mK, allowing significant improvements in thermal performance. The 75mm thickness offers a strong balance between insulation performance and construction depth, making it suitable for both new-build and refurbishment projects.
Celotex GA4000 is lightweight and easy to handle, helping to simplify transportation, cutting and installation on site. Despite its low weight, the rigid PIR core provides good durability and dimensional stability for long-term use when correctly specified and installed.
The insulation is manufactured using a blowing agent with zero Ozone Depletion Potential (ODP) and low Global Warming Potential (GWP), helping it contribute towards more energy-efficient building construction.
75mm Celotex GA4000 can be used across a variety of construction applications, including:
The 75mm profile provides a substantial layer of insulation while remaining suitable for a wide range of floor, wall and roof build-ups. It can be used as a primary insulation layer or as part of a multi-layer system designed to achieve improved thermal performance.
Celotex GA4000 should be stored flat in a dry, covered location and protected from moisture and prolonged exposure to weather conditions. Boards should be kept clear of the ground and stored away from sources of physical damage.
If temporary outdoor storage is unavoidable, the boards should be completely covered with suitable waterproof sheeting while allowing adequate ventilation.
Celotex GA4000 is manufactured to recognised industry standards and is suitable for use in a variety of building applications when installed in accordance with the manufacturer’s recommendations.
Celotex insulation products have also achieved favourable environmental ratings within the BRE Green Guide for applicable constructions.
What is PIR insulation?
PIR, or polyisocyanurate, is a rigid insulation material widely used in modern construction. It provides excellent thermal performance with relatively little thickness, making it suitable for a wide variety of floor, wall and roof applications.
What applications can 75mm Celotex GA4000 be used for?
75mm Celotex GA4000 can be used for a variety of floor, wall and roof applications, including pitched roofs, flat roofs, concrete floors, timber floors, cavity walls and internal wall insulation.
What is the thermal conductivity of Celotex GA4000?
Celotex GA4000 has a thermal conductivity of 0.022 W/mK, providing high thermal resistance relative to the thickness of the board.
Why would I choose 75mm Celotex insulation?
The 75mm board provides a substantial level of thermal insulation while remaining practical for use across a wide range of construction applications. It is a useful choice where improved thermal performance is required in floors, walls or roofs without using an excessively thick insulation layer.
Can Celotex GA4000 be used for both internal and external applications?
Yes. Depending on the construction specification, Celotex GA4000 can be incorporated into both internal and external building elements, including floors, walls and roofing systems.
Is Celotex GA4000 easy to install?
Yes. The boards are lightweight, rigid and relatively easy to cut to size using suitable hand tools. Accurate cutting and tightly fitted joints are important for achieving the best possible thermal performance.
What tools are required to cut Celotex GA4000?
The boards can typically be cut using a fine-toothed saw or an appropriate insulation cutting tool. Suitable measuring equipment and PPE should also be used during installation.
Does Celotex GA4000 resist moisture?
PIR insulation has good resistance to moisture, and the foil facings provide additional protection. However, the boards should still be stored and installed in accordance with Celotex guidance and should not be left exposed to persistent moisture.
Is Celotex GA4000 environmentally friendly?
Celotex GA4000 is manufactured using a blowing agent with zero Ozone Depletion Potential (ODP) and low Global Warming Potential (GWP). Its high thermal performance can also help reduce building heat loss and associated energy consumption over the life of the construction.
How long does Celotex GA4000 insulation last?
When correctly specified, installed and protected within the building construction, rigid PIR insulation can provide effective thermal performance for the lifetime of the building.
Is Celotex GA4000 fireproof?
No. Celotex GA4000 should not be described as fireproof. It is a combustible PIR insulation product and should be installed as part of a properly designed construction that meets the relevant fire safety and building regulation requirements.
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