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IMPORTANT: CLICK FOR PIR PRODUCT AVAILABILITY INFORMATION

Celotex GA4000 General Application Rigid PIR Boards

Standard Celotex Product, generally readily available in most thickness’s

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

The Celotex GA4000 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

Product Description

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 Tuff-R GA4000 is a multi-purpose rigid polyisocyanurate foam (PIR) 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, Thickness's 50-100mm, Lambda: 0.022 W/mK, Low emissivity foil facings

Product Benefits

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.

GA4000 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 availability indicators

GA4000 - Price and Availability Advisory:

Presently there are no availability restrictions.

Excellent = Product Availability Excellent  Good = Product Availability Good  Fair = Product Availability Fair  Poor =  Product Availability Poor  Undetermined = Product Availability Undetermined
Availability relies on stock levels at closest depots and upon transport logistics to effect deliveries


Technical Data

Celotex GA4000 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 GA4050 1.2 x 2.4 = 2.88m² 50 0.022 2.25 0.44 1.55 4.46
Celotex GA4055 1.2 x 2.4 = 2.88m² 55 0.022 2.50 0.40 1.74 5.01
Celotex GA4060 1.2 x 2.4 = 2.88m² 60 0.022 2.70 0.37 1.90 5.47
Celotex GA4065 1.2 x 2.4 = 2.88m² 65 0.022 2.95 0.34 2.05 5.90
Celotex GA4070 1.2 x 2.4 = 2.88m² 70 0.022 3.15 0.32 2.19 6.31
Celotex GA4075 1.2 x 2.4 = 2.88m² 75 0.022 3.40 0.29 2.34 6.74
Celotex GA4080 1.2 x 2.4 = 2.88m² 80 0.022 3.60 0.28 2.48 7.14
Celotex GA4085 1.2 x 2.4 = 14.40m² 85 0.022 3.85 0.26 2.62 37.73
Celotex GA4090 1.2 x 2.4 = 2.88m² 90 0.022 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) = 0.022 | 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

 

GA4000 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 TB4000 and XR4000 branding is used to differentiate between boards thinner and thicker than the GA4000 range.

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    Celotex TB4000 board thickness's from 20mm to 45mm, and XR4000  board thickness's from 110mm to 200mm
  • Celotex CW4000

    Celotex Cavity Wall boards are cut-down (0.45 x 1.2m) versions of the TB4000, GA4000 & XR4000 general application boards.

    View Full Detail

    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

    View Full Detail

    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.

    View Full Detail

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

Product Installation

Celotex GA4000 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 GA4000 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 GA4000 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.


Contact Manufacturer

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.

Insulation Online Limited

27 Massetts Road, Horley, Surrey, RH6 7DQ, UK

Telephone: 0333 8000 828

Facsimile: 0333 7000 797

Email: enquiries@insulation-online.com

Web site: www.insulation-online.com

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