Minimum order £500.00 Ex-VAT - Delivery Vehicle Access: 28 ton curtain-sided lorry off-load requirement.

    Shopping Basket

IMPORTANT: CLICK FOR PIR PRODUCT AVAILABILITY INFORMATION

Celotex XR4000 Extra Resistance Rigid PIR Boards

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

Product Functions Celotex XR4000 installed above Rockwoll RWA45 between ceiling joists

The Celotex XR4000 range is targeted at ‘cut-to-fit’ applications between rafters or joists and enables users to achieve lower U-values with a single layer of insulation than has previously been possible. XR4000 is also appropriate for use in ceilings, walls and floors.

These thicker board versions can be used in any rafter or joist application where there is the need to achieve improved U Values from those available from a thinner board.

They are commonly used in conjunction with Multi-foil insulation to maximise the thermal property potential of utilising traditional solid insulation and heat resistant barriers.

Common applications include, between and over rafters, between and under rafters, between rafters, pitched roof sarking, ventilated lead covered flat roof, between and under flat roof joists, between and under ceiling joists, balconies and terraces, loft conversions, loft insulation, single timber frame wall lining, steel stud frame walls, timber frame wall lining, timber frame walls sheathing, Rainscreen cladding, between floor joists, suspended timber floors, between and under floor joists, beam and block floors, concrete slab floors, upgrading concrete slab floors, basement upgrades and conversions, garage upgrades and 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 Xtra-R is a premium performance multi-purpose rigid polyisocyanurate foam (PIR) thermal insulation board with reflective foil facings. It provides multi-purpose cavity wall insulation boards that are uniquely reinforced with glass-fibre and features strong reaction-to-fire performance when measured in accordance with new European Standards.

Like the Celotex GA400 range, XR4000 is installed in conjunction with an appropriate lining panel, for example standard gypsum plasterboard to BS 1230-1 : 1985.

Board size: 1200 x 2400mm, Thickness's 110 - 200mm, Lambda: 0.022 W/mK, Low emissivity foil facings

Product Benefits

Celotex XR4000 (Extra-Resistance)  range of high performance thermal insulation provides reliable long term energy savings for buildings. Its low emissivity foil facers give improved thermal insulation and provides a vapour control layer when board joints are taped. Thermal bridging through studs and rails is reduced, and it can be nailed direct to stud framing, and can be dry-lined directly over insulation
These boards 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 SuperFoil, SuperQuilt, TLX Silver, TLX Gold, Gen-X, Actis Triso Super 10, and other Actis hybrid insulation.

Certified under BBA certificate number 95/3197 and 09/4667

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.

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 ...

England and Wales - Approved Documents L1 and L2, Table 1 Scotland - Technical Standards J3.2, Tables 1, and J8.3 Northern Ireland - Technical Booklet F, Tables 1.2 and 1.4


Product availability indicators

XR4000 - 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 XR4000 PIR Insulation Boards for applications requiring Extra Thermal  Resistance

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 XR4110 1.2 x 2.4 = 2.88m² 110 0.022 5.00 0.20 3.58 10.31
Celotex XR4120 1.2 x 2.4 = 2.88m² 120 0.022 5.45 0.18 3.88 11.17
Celotex XR4130 1.2 x 2.4 = 2.88m² 130 0.022 5.90 0.17 4.19 12.07
Celotex XR4140 1.2 x 2.4 = 2.88m² 140 0.022 6.35 0.16 4.49 12.93
Celotex XR4150 1.2 x 2.4 = 2.88m² 150 0.022 6.80 0.15 4.79 13.80
Celotex XR4165 1.2 x 2.4 = 2.88m² 165 0.022 7.50 0.13 5.43 15.64
Celotex XR4200 1.2 x 2.4 = 2.88m² 200 0.022 9.05 0.11 6.53 18.81

Thermal conductivity / Lambda value (W/mK) = 0.022 | Compressive strength (kPa) = ≥ 120 | 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 XR4000 Datasheet | Celotex Between and Over Rafters |Celotex Masonry Wall | Celotex Concrete Slab Floors | Celotex BBA Certification | Celotex Handy Guide

 

XR4000 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 - XR4000 = 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 & GA ranges

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

    View Full Detail

    Celotex TB4000 and GA4000 General Application Boards thickness's ranging from 20mm to 100mm
  • 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 XR4000 installation guides for selected applications

General information relating to the installation of the XR4000 range

Make sure all studs and rails are flush, with no projections, and that services are correctly installed.
Cut Celotex Extra-R XR4000 to fit tightly between all studs and rails.
For optimum thermal performance, the unprinted foil surface should face the air cavity.
Insert insulation into framing and push back to plywood sheathing.
Fit services in to cavity if required.
Measure the wall height from floor level to underside of ceiling joists and cut board length to suit, using a trimming knife. Ensure that the wall insulation is continuous with the floor perimeter insulation.
Cut boards for infill panels, using off-cuts where possible, making sure there are no gaps at wall abutments.
Tightly butt edges of boards together, making sure there are no gaps.
Temporarily secure the boards with clout nails at 600 mm centres.
Mark stud lines on board surface as fixing guides for dry lining.
Celotex XR4000 installed in a pitched roof application Always fix back to solid timber, both at stud lines and at top and bottom rails.
Ensure that all board surfaces are clean and free from dust and then apply aluminium foil vapour-seal tape to all joints.
Taping the joints of the Celotex insulation with self adhesive aluminium foil tape provides a good vapour control layer and improves air tightness.
Seal the insulation at all abutments and service penetrations with a vapour resistant sealant.
Fix plasterboard lining over the Celotex insulation using plasterboard nails or screws of appropriate length and joint or skim to the desired finish.

Between rafters insulation application

Can be used between rafters, and 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 in a ventilated construction with 1F felt, 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. In the case of an unventilated 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.

Celotex XR4000 timber frame wall lining application

Insulating timber frame wall lining

Celotex utilises the low lambda values of XR4000 between the studs, followed by an internal lining of TB4000 over the studs, providing for a thin build-up with the excellent thermal insulation.
Make sure all studs and rails are flush, with no projections, and that services are correctly installed.
Insert insulation into framing and push back to plywood sheathing.
Fit services into cavity if required.
Cut the boards to fit tightly between all studs and rails.
For optimum thermal performance, the unprinted foil surface should face the air cavity.
Cut the boards for infill panels, using off-cuts where possible, making sure there are no gaps at wall abutments.
Ensure that the wall insulation is continuous with the floor perimeter insulation.
A vapour control layer (VCL) should be installed over the warm side of the stud-work.
Fix plasterboard lining over the VCL using plasterboard nails or screws.

Suspended timber floor insulation solution

Celotex XR4165 used in suspended timber floor insulation solution

Fitting floppy quilt insulation between floor joists can be difficult. Insulating a suspended timber floor is made easy using Celotex Insulation cut to fit between joists. 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 suspended timber floor, there is little choice but to install the insulation between the joists, but the thermal bridges created by the joists have to be considered. Continuity of the insulation must be ensured by packing the spaces between the external walls and the joists with insulation.
The void below an insulated suspended timber floor must be well ventilated. The insulation must be cut to fit tightly between the joists to prevent heat loss.
No separate vapour check membrane is required in this application; Celotex insulation acts as an effective internal vapour control layer when all joints are sealed. Suspended timber floor insulation Celotex


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.

Contact us

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

insulation-online.com - we always deliver top quality products, competitive pricing and an efficient caring service