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Celotex GA3000 General Application Rigid PIR Boards

Celotex GA3000 range thicknesses generally available for immediate delivery include: GA3050, GA3060, GA3070, GA3075, GA3080, GA3090, GA4100. Please review the availability 'Star Rating' shown against each item in the Drop-down price list, below.

Product Applications Celotex GA4000 installed above concrete floor, and in cavity wall application

The Celotex GA3000 Range Is entirely suitable for a number of applications including roof, wall and floor systems.

These general purpose boards are commonly used in conjunction with appropriate internal lining boards, such as standard plasterboard and thermal laminate wall-boards, as an insulating dry lining system to improve the thermal insulation of existing and new, solid or cavity masonry walls, or timber-frame walls.

They are frequently being used in conjunction with Multi-foil insulation to maximise the thermal properties potential of combining traditional solid insulation with that of heat reflecting products.

Common applications for this product include ...
Basements, Beam and Block Floors, Upgrading Concrete Slab Floors, Ventilated Lead Covering, Between Rafters, Between and Under Rafters, Between and Over Rafters, Between and Under Joists, Balconies and Terraces, Timber Frame Wall Lining, Timber Frame Walls Sheathing, Suspended Timber Floors, Steel Stud Frame Walls, Single Timber Frame Wall Lining, Rainscreen cladding, Pitched Roof Sarking, Concrete Slab Floors, Loft Conversions, Loft Insulation, Garage Conversions


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Click to Buy: Celotex GA3000 General Purpose PIR Boards

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Rarely requested product sourced directly from manufacturer. Celotex GA3050 50mm, 1.2x2.4m = 2.88m² - ranging from £7.52 to £7.87 per m²

1 plus boards @ £7.87 per m² = £22.66 (£27.19 inc-VAT) per board
5 plus boards @ £7.80 per m² = £22.46 (£26.95 inc-VAT) per board
9 plus boards @ £7.73 per m² = £22.25 (£26.70 inc-VAT) per board
13 plus boards @ £7.66 per m² = £22.05 (£26.46 inc-VAT) per board
17 plus boards @ £7.59 per m² = £21.85 (£26.22 inc-VAT) per board
21 plus boards @ £7.52 per m² = £21.65 (£25.98 inc-VAT) per board

Rarely requested product sourced directly from manufacturer. Celotex GA3060 60mm, 1.2x2.4m = 2.88m² - ranging from £9.72 to £10.17 per m²

1 plus boards @ £10.17 per m² = £29.29 (£35.15 inc-VAT) per board
5 plus boards @ £10.08 per m² = £29.04 (£34.85 inc-VAT) per board
9 plus boards @ £9.99 per m² = £28.78 (£34.54 inc-VAT) per board
13 plus boards @ £9.90 per m² = £28.52 (£34.22 inc-VAT) per board
17 plus boards @ £9.81 per m² = £28.26 (£33.91 inc-VAT) per board
21 plus boards @ £9.72 per m² = £28.00 (£33.60 inc-VAT) per board

Rarely requested product sourced directly from manufacturer. Celotex GA3070 70mm, 1.2x2.4m = 2.88m² - ranging from £11.30 to £11.82 per m²

1 plus boards @ £11.82 per m² = £34.05 (£40.86 inc-VAT) per board
5 plus boards @ £11.72 per m² = £33.74 (£40.49 inc-VAT) per board
9 plus boards @ £11.61 per m² = £33.44 (£40.13 inc-VAT) per board
13 plus boards @ £11.51 per m² = £33.14 (£39.77 inc-VAT) per board
17 plus boards @ £11.40 per m² = £32.84 (£39.41 inc-VAT) per board
21 plus boards @ £11.30 per m² = £32.54 (£39.05 inc-VAT) per board

Rarely requested product sourced directly from manufacturer. Celotex GA3075 75mm, 1.2x2.4m = 2.88m² - ranging from £11.07 to £11.58 per m²

1 plus boards @ £11.58 per m² = £33.36 (£40.03 inc-VAT) per board
5 plus boards @ £11.48 per m² = £33.07 (£39.68 inc-VAT) per board
9 plus boards @ £11.38 per m² = £32.77 (£39.32 inc-VAT) per board
13 plus boards @ £11.28 per m² = £32.48 (£38.98 inc-VAT) per board
17 plus boards @ £11.17 per m² = £32.18 (£38.62 inc-VAT) per board
21 plus boards @ £11.07 per m² = £31.89 (£38.27 inc-VAT) per board

Rarely requested product sourced directly from manufacturer. Celotex GA3080 80mm, 1.2x2.4m = 2.88m² - ranging from £12.82 to £13.41 per m²

1 plus boards @ £13.41 per m² = £38.63 (£46.36 inc-VAT) per board
5 plus boards @ £13.30 per m² = £38.29 (£45.95 inc-VAT) per board
9 plus boards @ £13.18 per m² = £37.95 (£45.54 inc-VAT) per board
13 plus boards @ £13.06 per m² = £37.61 (£45.13 inc-VAT) per board
17 plus boards @ £12.94 per m² = £37.27 (£44.72 inc-VAT) per board
21 plus boards @ £12.82 per m² = £36.93 (£44.32 inc-VAT) per board

Rarely requested product sourced directly from manufacturer. Celotex GA3090 90mm, 1.2x2.4m = 2.88m² - ranging from £14.20 to £14.86 per m²

1 plus boards @ £14.86 per m² = £42.80 (£51.36 inc-VAT) per board
5 plus boards @ £14.73 per m² = £42.42 (£50.90 inc-VAT) per board
9 plus boards @ £14.60 per m² = £42.04 (£50.45 inc-VAT) per board
13 plus boards @ £14.47 per m² = £41.66 (£49.99 inc-VAT) per board
17 plus boards @ £14.34 per m² = £41.29 (£49.55 inc-VAT) per board
21 plus boards @ £14.20 per m² = £40.91 (£49.09 inc-VAT) per board

Rarely requested product sourced directly from manufacturer. Celotex GA4100 100mm, 1.2x2.4m = 2.88m² - ranging from £14.34 to £15.01 per m²

1 plus boards @ £15.01 per m² = £43.22 (£51.86 inc-VAT) per board
5 plus boards @ £14.88 per m² = £42.84 (£51.41 inc-VAT) per board
9 plus boards @ £14.74 per m² = £42.46 (£50.95 inc-VAT) per board
13 plus boards @ £14.61 per m² = £42.08 (£50.50 inc-VAT) per board
17 plus boards @ £14.48 per m² = £41.69 (£50.03 inc-VAT) per board
21 plus boards @ £14.34 per m² = £41.31 (£49.57 inc-VAT) per board

Common product, generally held by all depots Generic Aluminised Tape, 100mm x 45m = 45lm - ranging from £0.16 to £0.17 per lm

1 plus rolls @ £0.17 per lm = £7.62 (£9.14 inc-VAT) per roll
5 plus rolls @ £0.17 per lm = £7.55 (£9.06 inc-VAT) per roll
10 plus rolls @ £0.17 per lm = £7.48 (£8.98 inc-VAT) per roll
15 plus rolls @ £0.16 per lm = £7.41 (£8.89 inc-VAT) per roll
20 plus rolls @ £0.16 per lm = £7.35 (£8.82 inc-VAT) per roll
25 plus rolls @ £0.16 per lm = £7.28 (£8.74 inc-VAT) per roll

Availability Undetermined - Special circumstances are involved in the supply of these products.. Celotex Rafter Clips (bag of 100) - ranging from £8.74 to £9.22

1 x bag @ £9.22 (£11.06 inc-VAT)
2 x bags @ £9.12 (£10.94 inc-VAT)
3 x bags @ £9.03 (£10.84 inc-VAT)
4 x bags @ £8.93 (£10.72 inc-VAT)
5 x bags @ £8.84 (£10.61 inc-VAT)
6 x bags @ £8.74 (£10.49 inc-VAT)

Price and Availability Information

Presently there are no availability restrictions, apart from manufacturing lead-times and minimum quantity order levels on certain product sizes.
Please observe the 'Star Rating' indicators to assess availability.

Excellent = Product Availability Excellent Good = Product Availability Good Fair = Product Availability Fair Poor =  Product Availability Poor Undetermined = Product Availability Undetermined
Product availability depends upon stock levels at closest depot and delivery logistics to geographic locations


Product Characteristics

The insulation boards are available in nominal dimensions of length (mm) 2400 x width (mm) 1200. Required ancillary materials include large-headed nails, screws, washers, aluminium joint tape and sealant.

This multi-purpose PIR insulation board has long been at the heart of Celotex product range and achieves an A+ rating when compared to the BRE Green Guide.

Celotex GA3000 is a rigid PIR (polyisocyanurate foam) multi-purpose thermal insulation board with reflective foil facings that are uniquely reinforced with glass-fibre and feature a strong reaction-to-fire performance when measured in accordance with new European Standards.

Board size: 1200 x 2400mm, thicknesses 50-100mm, Lambda: 0.023 W/mK, Low emissivity foil facings

Product Advantages

Celotex can be used in conjunction with appropriate internal lining boards, such as Gyproc or Knauf Plasterboards or associated products such as Knauf Thermal Laminate or Gyproc ThermaLine high performance wall-boards, as an insulating dry lining system to improve the thermal insulation of existing and new, solid or cavity masonry walls or timber-frame walls of dwellings or buildings of similar occupancy, type and conditions.

Celotex is also commonly being used in conjunction with Multi-Foil insulation products such as TLX Silver, TLX RafterFit, Gen-X, or Triso Super 10.

GA3000 may also be used in locations where the insulated surface is inaccessible, such as existing ceilings of flat roofs.

Offers high performance insulation with low emissivity foil facings offering enhanced thermal performance within cavity air spaces

Is certified under BBA certificate number 95/3197 and 09/4667

Is suitable for a number of applications including roof, wall and floor systems

Has low global warming potential (GWP) and zero ozone depletion potential (ODP)

Future proofs the energy performance of new and existing buildings



Product Specifications

Celotex GA3000 General Application PIR Insulation Boards

Product Code

Board dimensions

Thickness (mm)

λ Value (w/mK)

R-value (m²K/W)

U Value (W/m²K)

Weight (kg/m²)

Unit weight (kg)

Celotex GA3050 1.2 x 2.4 = 2.88m² 50 0.023 2.25 0.44 1.55 4.46
Celotex GA3055 1.2 x 2.4 = 2.88m² 55 0.023 2.50 0.40 1.74 5.01
Celotex GA3060 1.2 x 2.4 = 2.88m² 60 0.023 2.70 0.37 1.90 5.47
Celotex GA3065 1.2 x 2.4 = 2.88m² 65 0.023 2.95 0.34 2.05 5.90
Celotex GA3070 1.2 x 2.4 = 2.88m² 70 0.023 3.15 0.32 2.19 6.31
Celotex GA3075 1.2 x 2.4 = 2.88m² 75 0.023 3.40 0.29 2.34 6.74
Celotex GA3080 1.2 x 2.4 = 2.88m² 80 0.023 3.60 0.28 2.48 7.14
Celotex GA3085 1.2 x 2.4 = 14.40m² 85 0.023 3.85 0.26 2.62 37.73
Celotex GA3090 1.2 x 2.4 = 2.88m² 90 0.023 4.05 0.25 2.76 7.95
Celotex GA4100 1.2 x 2.4 = 2.88m² 100 0.022 4.50 0.22 3.27 9.42

Thermal conductivity / Lambda value (W/mK) = 0.023 | Compressive strength (kPa) = ≥ 140 | Water vapour resistance (MNs/g) = > 150 | Fire performance Class 1 in accordance with BS 476 Part 7. Please Note: R-Value = Thermal Resistance; U-Value = Thermal Transmittance Co-efficient; Compressive strength = kiloPascals; Vapour resistance = MegaNewton seconds per gram.


Product Information and Certification

Links to manufacturer's information. Click to download in a separate browser window.

Celotex GA4000 Datasheet | Celotex Suspended Timber Frame Floor |Celotex Stud Framed Wall | Celotex Between and Over Rafters | Celotex BBA Certification | Celotex Handy Guide


GA3000 Range - Certification

For the purpose of U value calculations to determine if the requirements of the Building (or other statutory) Regulations are met, the thermal conductivity (90/90 lambda value) of the boards may be taken as declared within the Celotex BBA Certificate No. 95/3197 & 09/4667 - GA4000 = 0.022 Wm1K 1 The requirement for limiting the heat loss through the building fabric will be satisfied if the U values of the building elements, including thermal bridging, do not exceed the maximum values in the relevant Elemental Method given in the national Building Regulations thus: England and Wales - Approved Documents L1 and L2, Table 1 Scotland - Technical Standards J3.2, Table 1, and J8.3, Table Northern Ireland - Technical Booklet F, Tables 1.2 and 1.4.


  • Celotex TB & XR ranges

    Celotex TB3000 and XR4000 branding is used to differentiate between boards thinner and thicker than the GA3000 range.

    Click for more information

    Celotex TB4000 board thickness's from 20mm to 45mm, and XR4000  board thickness's from 110mm to 200mm
  • Celotex CW3000

    Celotex Cavity Wall boards are cut-down (0.45 x 1.2m) versions of the TB3000, GA3000 & XR4000 general application boards.

    Click for more information

    Celotex Cavity Wall boards are cut-down versions of the  general application boards TB4000, GA4000 & XR4000
  • Kingspan TP10 / TF70

    Kingspan TP10 & TF70 are identical boards, branded to emphasise their suitability for roof and floor applications

    Click for more information

    Kingspan TP10 & TF70 are identical boards, branded to emphasise their suitability for roof and floor applications
  • Kingspan TW50

    Kingspan ThermaWall TW50 is a cut-down (0.45 x 1.2m) version of the TP10, TF70 & TW55, general application boards.

    Click for more information

    Kingspan TW50 is a cut-down (0.45 x 1.2m) version of TP10, TF70 and TW55

Product Installation

Celotex GA3000 installation guides for general applications

Pitched roof with Sarking

The void created by a pitched roof can be made habitable by insulating along the plane of the roof pitch with Celotex rigid PIR insulation boards. This creates a warm, potentially habitable roof space in which water pipes and tanks no longer need to be insulated. When used over the roof structure as insulating sarking, Celotex insulation creates a warm roof structure and eliminates thermal bridging at the rafters, whilst the foil facings, used in conjunction with taped joints, provide an effective barrier to moisture vapour and air leakage. The use of a single continuous layer of insulation over the rafters thereby eliminates the risk of condensation and avoids the need for ventilation of the rafter space. Where very low U-values are required Celotex recommends a two-layer system in order to reduce the racking forces on the fasteners required to fix counter- battens to rafters. In this system, the first layer of insulation is applied as a complete layer over the rafters. A second, thinner layer is then fitted over the first layer, between the counter-battens.

Insulation between and over rafters

Celotex GA4000 installed in a pitched roof application

Where headroom and rafter depth is limited, Celotex insulation may be fitted between and over the rafters. The void created by a pitched roof can be made habitable by insulating along the plane of the roof pitch with Celotex rigid PIR insulation boards. This creates a warm, potentially habitable, roof space in which water pipes and tanks no longer need to be insulated. Where headroom and rafter depth is limited, Celotex insulation may be fitted between and over the rafters. If this two-layer solution is chosen, it is important that the thermal resistance of the inner layer (between the rafters), is less than that of the outer layer (over the rafters). This reduces the risk of interstitial condensation between the insulation layers. The condensation risk also depends upon occupancy and building use. Celotex recommends that a condensation risk analysis is obtained to determine the optimum solution for your project.

Insulation between and under rafters

The void created by a pitched roof can be made habitable by insulating along the plane of the roof pitch with Celotex rigid PIR insulation boards. This creates a warm, potentially habitable roof space in which water pipes and tanks no longer need to be insulated. If sarking felt is being used, a minimum 50 mm ventilated air space must be provided between the felt and the cold side of the insulation in order to minimise the risk of condensation formation. This is known as ventilated construction. With some breathable membranes, the cold side of the insulation may be placed in direct contact with the membrane (check with membrane supplier prior to specification). However, the outer side of the membrane must be adjacent to an air space to allow moisture vapour to escape to the outside of the building, which is known as an unventilated construction.

Insulating interior partition walls and the interiors of external walls

Celotex GA3000 will significantly improve the thermal insulation of new and existing, solid or cavity masonry walls (masonry includes clay and calcium silicate bricks, concrete blocks, natural and reconstituted stone blocks) or timber-frame walls of dwellings and buildings of similar occupancy, type and condition.

Celotex GA4000 installed in a timber framed wall application

The walls of new buildings should be designed and constructed in accordance with the relevant codes of practice, e.g. BS 5628-3.

All walls must be in a good state of repair with no evidence of rain penetration, damp or frost damage. The surfaces of masonry walls should be sound and free from loose material; large projections should be removed and holes filled and levelled. A survey of the wall may be required to establish the extent of any packing that may be required to ensure the support battens provide a uniform plane for the boards to be fixed.

The installation of insulated dry lining systems requires careful detailing around doors and windows to achieve a satisfactory surface for finishing. In addition, every attempt should be made to minimise the risk of cold bridging at reveals and where heavy party walls are attached to the external wall.

In new work the construction must be designed to accommodate the thickness of the dry lining, particularly at reveals, heads, sills and in relation to ceiling height. On existing walls consideration should be given to lining the reveals with a thinner layer of insulation and lining board. Services can be incorporated in the void formed between the insulation and the lining boards, making chasing of the wall unnecessary.

Where the services have a greater depth than the void, the wall should be chased in preference to the insulation. It is recommended that services penetrating the insulation or any vapour check lining board, e.g. light switches, power outlets, be kept to a minimum to limit possible penetration of water vapour. When the system is to be installed in existing buildings it should be realised that a small reduction in room size will occur and that permanent fixtures, e.g. baths, will present difficulties

Steel stud framed wall insulation

Historically, the use of steel framed walls has been found mostly in the construction of commercial buildings. However, the recent growth in Modern Methods of Construction (MMC) has seen an increase in the popularity of lightweight steel framed buildings for both commercial and residential developments. The off-site pre-fabrication of framed panels allows rapid, accurate construction on site.

Celotex GA4000 performance thermal insulation in beam and block floors to minimise insulation thickness

To minimise building heat losses, rigid thermal insulation is placed on the outside of the frame as a continuous layer to eliminate thermal bridging through the metal studs. This is known as 'warm frame' construction. The very low thermal conductivity of Celotex Tuff-R GA3000 enables high levels of insulation to be achieved with minimal overall thickness.

Beam & block floor insulation

Beam and block floors can be insulated simply by laying Celotex Insulation boards over the floor before applying a screed or board finish. The specification of insulation for ground floors is more complex than that for walls or roofs. This is because the mechanisms for heat flow are affected by the ratio of surface area to perimeter. With a beam and block floor, there is little choice but to install the insulation over the floor before screeding. The ventilated air space beneath any suspended floor can be very cold, so Celotex recommends the application of a continuous vapour - control membrane over the top of the insulation, before screeding, to reduce the risk of condensation forming at the insulation/slab interface. This also prevents screed migration between the board joints, thus avoiding cold bridges.


Manufacturer's Contact Details

Celotex Limited

Lady Lane Industrial Estate, Hadleigh, Ipswich, Suffolk, IP7 6BA

Celotex Technical Advisory Service.

Telephone: 0901 996 0100 (30p per minute) - Fax: 01473 820 889
Email: technical@celotex.co.uk
Web sites: Celotex Home Page / Celotex U-Value Calculator.

Our Contact Details

www.just-insulation.com

Insulation Online Limited, 27 Massetts Road, Horley, Surrey, RH6 7DQ

Telephone: 0333 9000 989

Facsimile: 0333 7000 797

Email: enquiries@just-insulation.com

Web site: www.just-insulation.com

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