Full Fill Built-in Insulation System Continuous wall insulation system that delivers ultimate thermal performance with the added assurance of protection from wind driven rain.

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The Xi products have been developed to deliver the U-value requirements to meet Passive standards. It’s no longer just about U-values: how the system builds, how it interconnects at junctions and how it is witnessed and confirmed on site, are all equally important facets.

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Xtratherm offer an extensive range of technically enhanced rigid insulation products for commercial and industrial projects

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Tapered Roofing System
The XtraFall system provides a high performance precision solution to thermal insulation and water drainage on at roofs.

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The Xtratherm range of high performance insulation boards provides the ideal technically advanced solution for flat roof projects.

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PLATINUM SERVICE for Developers

PLATINUM SERVICE for Developers

Developers and their design and certifcation team can rely on the expertise and professional support of the whole Xtratherm Team - it is not just about buying insulation products.

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Full Fill Built-in Insulation System

Continuous wall insulation system that delivers ultimate thermal performance with the added assurance of protection from wind driven rain.

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High Performance rigid extruded polystryrene
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At Xtratherm Xi Academy we understand the importance of giving our customers the best technical advice. The Xi Academy is open to everyone from Builders and Architects to Secondary Education Pupils to learn about advanced building methods, insulation and sustainability.

Accredited Details Library

From 1st July 2013, all manufacturers of construction products are required to CE mark all products manufactured in accordance with a harmonised European norm (hEN) or European Technical Assessment (ETA).

Xtratherm manufacture products under EN 13165/EN 13166/EN13950; CE marking on our pack labels assures the resellers and users of Xtratherm products as to the performance characteristics of that product manufactured under EN Quality Standards.

Health and safety information can be downloaded here.

ACD Details

  • ACD Ref: MCI-GF-01

    Table K1: E5

    Wall floor junction with insulation under screed

    Y 0.02
    f 0.85
    Wall floor junction with insulation under screed MCI-GF-01 E5 0.02 0.85
  • ACD Ref: MCI-GF-02

    Table K1: E5

    Wall floor junction with insulation under slab

    Y 0.04
    f 0.87
    Wall floor junction with insulation under slab MCI-GF-02 E5 0.04 0.87
  • ACD Ref:

    Table K1: E5

    Wall floor junction with beam and block floor

    Y 0.05
    f 0.86
    Wall floor junction with beam and block floor E5 0.05 0.86
  • ACD Ref: MCI-IF-01

    Table K1: E6

    Intermediate concrete floor within dwelling

    Y 0.01
    f 0.98
    Intermediate concrete floor within dwelling MCI-IF-01 E6 0.01 0.98
  • ACD Ref: MCI-IF-02

    Table K1: E6

    Intermediate timber floor within dwelling

    Y 0.00
    f 0.98
    Intermediate timber floor within dwelling MCI-IF-02 E6 0.00 0.98
  • ACD Ref: MCI-IF-01

    Table K1: E7

    Intermediate concrete floor between dwellings

    Y 0.05
    f 0.98
    Intermediate concrete floor between dwellings MCI-IF-01 E7 0.05 0.98
  • ACD Ref: MCI-GF-01

    Table K1: E5

    Wall floor junction with insulation under screed

    Y 0.06
    f 0.82
    Wall floor junction with insulation under screed MCI-GF-01 E5 0.06 0.82
  • ACD Ref: MCI-GF-02

    Table K1: E5

    Wall floor junction with insulation under slab

    Y 0.08
    f 0.84
    Wall floor junction with insulation under slab MCI-GF-02 E5 0.08 0.84
  • ACD Ref:

    Table K1: E5

    Wall floor junction with beam and block floor

    Y 0.13
    f 0.82
    Wall floor junction with beam and block floor E5 0.13 0.82
  • ACD Ref: MCI-IF-01

    Table K1: E6

    Intermediate concrete floor within dwelling

    Y 0.00
    f 0.98
    Intermediate concrete floor within dwelling MCI-IF-01 E6 0.00 0.98
  • ACD Ref: MCI-IF-02

    Table K1: E6

    Intermediate timber floor within dwelling

    Y 0.00
    f 0.98
    Intermediate timber floor within dwelling MCI-IF-02 E6 0.00 0.98
  • ACD Ref: MCI-IF-01

    Table K1: E7

    Intermediate concrete floor between dwellings

    Y 0.05
    f 0.98
    Intermediate concrete floor between dwellings MCI-IF-01 E7 0.05 0.98
  • ACD Ref: MCI-IF-02

    Table K1: E7

    Intermediate timber floor between dwellings

    Y 0.05
    f 0.98
    Intermediate timber floor between dwellings MCI-IF-02 E7 0.05 0.98
  • ACD Ref: MCI-GF-01

    Table K1: E5

    Wall floor junction with insulation under screed

    Y 0.16
    f 0.80
    Wall floor junction with insulation under screed MCI-GF-01 E5 0.16 0.80
  • ACD Ref: MCI-IF-01

    Table K1: E6

    Intermediate concrete floor within dwelling

    Y 0.00
    f 0.97
    Intermediate concrete floor within dwelling MCI-IF-01 E6 0.00 0.97
  • ACD Ref: MCI-IF-02

    Table K1: E6

    Intermediate timber floor within dwelling

    Y 0.00
    f 0.97
    Intermediate timber floor within dwelling MCI-IF-02 E6 0.00 0.97
  • ACD Ref: MCI-IF-01

    Table K1: E7

    Intermediate concrete floor between dwellings

    Y 0.05
    f 0.97
    Intermediate concrete floor between dwellings MCI-IF-01 E7 0.05 0.97
  • ACD Ref: MCI-IF-02

    Table K1: E7

    Intermediate timber floor between dwellings

    Y 0.05
    f 0.97
    Intermediate timber floor between dwellings MCI-IF-02 E7 0.05 0.97
  • ACD Ref: MCI-GF-01

    Table K1: E5

    Wall floor junction with insulation under screed

    Y 0.16
    f 0.80
    Wall floor junction with insulation under screed MCI-GF-01 E5 0.16 0.80
  • ACD Ref: MCI-IF-01

    Table K1: E6

    Intermediate concrete floor within dwelling

    Y 0.00
    f 0.97
    Intermediate concrete floor within dwelling MCI-IF-01 E6 0.00 0.97
  • ACD Ref: MCI-IF-02

    Table K1: E6

    Intermediate timber floor within dwelling

    Y 0.00
    f 0.97
    Intermediate timber floor within dwelling MCI-IF-02 E6 0.00 0.97
  • ACD Ref: MCI-IF-01

    Table K1: E7

    Intermediate concrete floor between dwellings

    Y 0.05
    f 0.97
    Intermediate concrete floor between dwellings MCI-IF-01 E7 0.05 0.97
  • ACD Ref: MCI-IF-02

    Table K1: E7

    Intermediate timber floor between dwellings

    Y 0.05
    f 0.97
    Intermediate timber floor between dwellings MCI-IF-02 E7 0.05 0.97
  • ACD Ref: MCI-GF-01

    Table K1: E5

    Wall floor junction with insulation under screed

    Y 0.02
    f 0.85
    Wall floor junction with insulation under screed MCI-GF-01 E5 0.02 0.85
  • ACD Ref: MCI-GF-02

    Table K1: E5

    Wall floor junction with insulation under slab

    Y 0.04
    f 0.87
    Wall floor junction with insulation under slab MCI-GF-02 E5 0.04 0.87
  • ACD Ref:

    Table K1: E5

    Wall floor junction with beam and block floor

    Y 0.05
    f 0.86
    Wall floor junction with beam and block floor E5 0.05 0.86
  • ACD Ref: MCI-IF-01

    Table K1: E6

    Intermediate concrete floor within dwelling

    Y 0.01
    f 0.98
    Intermediate concrete floor within dwelling MCI-IF-01 E6 0.01 0.98
  • ACD Ref: MCI-IF-02

    Table K1: E6

    Intermediate timber floor within dwelling

    Y 0.00
    f 0.98
    Intermediate timber floor within dwelling MCI-IF-02 E6 0.00 0.98
  • ACD Ref: MCI-IF-01

    Table K1: E7

    Intermediate concrete floor between dwellings

    Y 0.05
    f 0.98
    Intermediate concrete floor between dwellings MCI-IF-01 E7 0.05 0.98
  • ACD Ref: MCI-IF-01

    Table K1: E7

    Intermediate concrete floor between dwellings

    Y 0.05
    f 0.98
    Intermediate concrete floor between dwellings MCI-IF-01 E7 0.05 0.98
  • ACD Ref: MCI-IF-02

    Table K1: E7

    Intermediate timber floor between dwellings

    Y 0.05
    f 0.98
    Intermediate timber floor between dwellings MCI-IF-02 E7 0.05 0.98
  • ACD Ref: MCI-GF-01

    Table K1: E5

    Wall floor junction with insulation under screed

    Y 0.06
    f 0.83
    Wall floor junction with insulation under screed MCI-GF-01 E5 0.06 0.83
  • ACD Ref: MCI-GF-02

    Table K1: E5

    Wall floor junction with insulation under slab

    Y 0.08
    f 0.85
    Wall floor junction with insulation under slab MCI-GF-02 E5 0.08 0.85
  • ACD Ref:

    Table K1: E5

    Wall floor junction with beam and block floor

    Y 0.10
    f 0.83
    Wall floor junction with beam and block floor E5 0.10 0.83
  • ACD Ref: MCI-IF-01

    Table K1: E6

    Intermediate concrete floor within dwelling

    Y 0.01
    f 0.97
    Intermediate concrete floor within dwelling MCI-IF-01 E6 0.01 0.97
  • ACD Ref: MCI-IF-02

    Table K1: E6

    Intermediate timber floor within dwelling

    Y 0.00
    f 0.97
    Intermediate timber floor within dwelling MCI-IF-02 E6 0.00 0.97
  • ACD Ref: MCI-IF-01

    Table K1: E7

    Intermediate concrete floor between dwellings

    Y 0.05
    f 0.97
    Intermediate concrete floor between dwellings MCI-IF-01 E7 0.05 0.97
  • ACD Ref: MCI-IF-02

    Table K1: E7

    Intermediate timber floor between dwellings

    Y 0.05
    f 0.97
    Intermediate timber floor between dwellings MCI-IF-02 E7 0.05 0.97
  • ACD Ref: MCI-GF-01

    Table K1: E5

    Wall floor junction with insulation under screed

    Y 0.15
    f 0.78
    Wall floor junction with insulation under screed MCI-GF-01 E5 0.15 0.78
  • ACD Ref: MCI-IF-01

    Table K1: E6

    Intermediate concrete floor within dwelling

    Y 0.00
    f 0.98
    Intermediate concrete floor within dwelling MCI-IF-01 E6 0.00 0.98
  • ACD Ref: MCI-IF-02

    Table K1: E6

    Intermediate timber floor within dwelling

    Y 0.00
    f 0.97
    Intermediate timber floor within dwelling MCI-IF-02 E6 0.00 0.97
  • ACD Ref: MCI-IF-01

    Table K1: E7

    Intermediate concrete floor between dwellings

    Y 0.05
    f 0.97
    Intermediate concrete floor between dwellings MCI-IF-01 E7 0.05 0.97
  • ACD Ref: MCI-IF-02

    Table K1: E7

    Intermediate timber floor between dwellings

    Y 0.06
    f 0.97
    Intermediate timber floor between dwellings MCI-IF-02 E7 0.06 0.97
  • ACD Ref:

    Table K1: P1

    Party Wall floor junction with insulation under screed

    Y 0.07
    f 0.94
    Party Wall floor junction with insulation under screed P1 0.07 0.94
  • ACD Ref:

    Table K1: P4

    Party Wall Ceiling junction

    Y 0.10
    f 0.90
    Party Wall Ceiling junction P4 0.10 0.90
  • ACD Ref:

    Table K1: P1

    Party Wall floor junction with insulation under screed

    Y 0.07
    f 0.94
    Party Wall floor junction with insulation under screed P1 0.07 0.94
  • ACD Ref:

    Table K1: P4

    Party Wall Ceiling junction

    Y 0.10
    f 0.90
    Party Wall Ceiling junction P4 0.10 0.90
  • ACD Ref: MCI-RE-01

    Table K1: E10

    Wall ceiling junction Eaves (Insulation at ceiling level)

    Y 0.05
    f 0.93
    Wall ceiling junction Eaves (Insulation at ceiling level) MCI-RE-01 E10 0.05 0.93
  • ACD Ref: MCI-RG-01

    Table K1: E12

    Wall ceiling junction gable (Insulation at ceiling level)

    Y 0.05
    f 0.91
    Wall ceiling junction gable (Insulation at ceiling level) MCI-RG-01 E12 0.05 0.91
  • ACD Ref: MCI-RF-01

    Table K1: E14

    Flat roof and wall junction

    Y 0.04
    f 0.95
    Flat roof and wall junction MCI-RF-01 E14 0.04 0.95
  • ACD Ref: MCI-RF-02

    Table K1: E15

    Flat roof with parapet and wall junction

    Y 0.08
    f 0.95
    Flat roof with parapet and wall junction MCI-RF-02 E15 0.08 0.95
  • ACD Ref: MCI-RE-01

    Table K1: E10

    Wall ceiling junction Eaves (Insulation at ceiling level)

    Y 0.05
    f 0.94
    Wall ceiling junction Eaves (Insulation at ceiling level) MCI-RE-01 E10 0.05 0.94
  • ACD Ref: MCI-RG-01

    Table K1: E12

    Wall ceiling junction gable (Insulation at ceiling level)

    Y 0.10
    f 0.88
    Wall ceiling junction gable (Insulation at ceiling level) MCI-RG-01 E12 0.10 0.88
  • ACD Ref: MCI-RF-01

    Table K1: E14

    Flat roof and wall junction

    Y 0.04
    f 0.96
    Flat roof and wall junction MCI-RF-01 E14 0.04 0.96
  • ACD Ref: MCI-RF-02

    Table K1: E15

    Flat roof with parapet and wall junction

    Y 0.13
    f 0.93
    Flat roof with parapet and wall junction MCI-RF-02 E15 0.13 0.93
  • ACD Ref: MCI-RE-01

    Table K1: E10

    Wall ceiling junction Eaves (Insulation at ceiling level)

    Y 0.05
    f 0.94
    Wall ceiling junction Eaves (Insulation at ceiling level) MCI-RE-01 E10 0.05 0.94
  • ACD Ref: MCI-RG-01

    Table K1: E12

    Wall ceiling junction gable (Insulation at ceiling level)

    Y 0.22
    f 0.83
    Wall ceiling junction gable (Insulation at ceiling level) MCI-RG-01 E12 0.22 0.83
  • ACD Ref: MCI-RF-01

    Table K1: E14

    Flat roof and wall junction

    Y 0.04
    f 0.96
    Flat roof and wall junction MCI-RF-01 E14 0.04 0.96
  • ACD Ref: MCI-RF-02

    Table K1: E15

    Flat roof with parapet and wall junction

    Y 0.22
    f 0.89
    Flat roof with parapet and wall junction MCI-RF-02 E15 0.22 0.89
  • ACD Ref: MCI-RE-01

    Table K1: E10

    Wall ceiling junction Eaves (Insulation at ceiling level)

    Y 0.05
    f 0.93
    Wall ceiling junction Eaves (Insulation at ceiling level) MCI-RE-01 E10 0.05 0.93
  • ACD Ref: MCI-RG-01

    Table K1: E12

    Wall ceiling junction gable (Insulation at ceiling level)

    Y 0.05
    f 0.91
    Wall ceiling junction gable (Insulation at ceiling level) MCI-RG-01 E12 0.05 0.91
  • ACD Ref: MCI-RF-01

    Table K1: E14

    Flat roof and wall junction

    Y 0.04
    f 0.95
    Flat roof and wall junction MCI-RF-01 E14 0.04 0.95
  • ACD Ref: MCI-RF-02

    Table K1: E15

    Flat roof with parapet and wall junction

    Y 0.08
    f 0.95
    Flat roof with parapet and wall junction MCI-RF-02 E15 0.08 0.95
  • ACD Ref: MCI-RE-01

    Table K1: E10

    Wall ceiling junction Eaves (Insulation at ceiling level)

    Y 0.05
    f 0.94
    Wall ceiling junction Eaves (Insulation at ceiling level) MCI-RE-01 E10 0.05 0.94
  • ACD Ref: MCI-RG-01

    Table K1: E12

    Wall ceiling junction gable (Insulation at ceiling level)

    Y 0.22
    f 0.83
    Wall ceiling junction gable (Insulation at ceiling level) MCI-RG-01 E12 0.22 0.83
  • ACD Ref: MCI-RF-01

    Table K1: E14

    Flat roof and wall junction

    Y 0.04
    f 0.96
    Flat roof and wall junction MCI-RF-01 E14 0.04 0.96
  • ACD Ref: MCI-RF-02

    Table K1: E15

    Flat roof with parapet and wall junction

    Y 0.22
    f 0.89
    Flat roof with parapet and wall junction MCI-RF-02 E15 0.22 0.89
  • ACD Ref: MCI-RE-01

    Table K1: E10

    Wall ceiling junction Eaves (Insulation at ceiling level)

    Y 0.04
    f 0.94
    Wall ceiling junction Eaves (Insulation at ceiling level) MCI-RE-01 E10 0.04 0.94
  • ACD Ref: MCI-RG-01

    Table K1: E12

    Wall ceiling junction gable (Insulation at ceiling level)

    Y 0.10
    f 0.87
    Wall ceiling junction gable (Insulation at ceiling level) MCI-RG-01 E12 0.10 0.87
  • ACD Ref: MCI-RF-01

    Table K1: E14

    Flat roof and wall junction

    Y 0.04
    f 0.95
    Flat roof and wall junction MCI-RF-01 E14 0.04 0.95
  • ACD Ref: MCI-RF-02

    Table K1: E15

    Flat roof with parapet and wall junction

    Y 0.12
    f 0.93
    Flat roof with parapet and wall junction MCI-RF-02 E15 0.12 0.93
  • ACD Ref: MCI-RE-01

    Table K1: E10

    Wall ceiling junction Eaves (Insulation at ceiling level)

    Y 0.05
    f 0.94
    Wall ceiling junction Eaves (Insulation at ceiling level) MCI-RE-01 E10 0.05 0.94
  • ACD Ref: MCI-RG-01

    Table K1: E12

    Wall ceiling junction gable (Insulation at ceiling level)

    Y 0.22
    f 0.83
    Wall ceiling junction gable (Insulation at ceiling level) MCI-RG-01 E12 0.22 0.83
  • ACD Ref: MCI-RF-01

    Table K1: E14

    Flat roof and wall junction

    Y 0.04
    f 0.95
    Flat roof and wall junction MCI-RF-01 E14 0.04 0.95
  • ACD Ref: MCI-RF-02

    Table K1: E15

    Flat roof with parapet and wall junction

    Y 0.23
    f 0.89
    Flat roof with parapet and wall junction MCI-RF-02 E15 0.23 0.89
  • ACD Ref: MCI-WD-04

    Table K1: E3

    Sill with Proprietary cavity closer

    Y 0.04
    f 0.84
    Sill with Proprietary cavity closer MCI-WD-04 E3 0.04 0.84
  • ACD Ref: MCI-WD-04

    Table K1: E3

    Concrete Sill with Proprietary cavity closer

    Y 0.03
    f 0.95
    Concrete Sill with Proprietary cavity closer MCI-WD-04 E3 0.03 0.95
  • ACD Ref: MCI-WD-04

    Table K1: E3

    Sill with Proprietary cavity closer (Checked)

    Y 0.03
    f 0.88
    Sill with Proprietary cavity closer (Checked) MCI-WD-04 E3 0.03 0.88
  • ACD Ref: MCI-WD-02

    Table K1: E2

    Sperated Lintel with Proprietary cavity closer

    Y 0.03
    f 0.93
    Sperated Lintel with Proprietary cavity closer MCI-WD-02 E2 0.03 0.93
  • ACD Ref: MCI-WD-03

    Table K1: E2

    Steel Insulated Lintel

    Y 0.06
    f 0.94
    Steel Insulated Lintel MCI-WD-03 E2 0.06 0.94
  • ACD Ref: MCI-WD-02

    Table K1: E2

    Sperated Lintel with Proprietary cavity closer (Checked)

    Y 0.01
    f 0.97
    Sperated Lintel with Proprietary cavity closer (Checked) MCI-WD-02 E2 0.01 0.97
  • ACD Ref: MCI-WD-03

    Table K1: E2

    Steel Insulated Lintel (Checked)

    Y 0.05
    f 0.96
    Steel Insulated Lintel (Checked) MCI-WD-03 E2 0.05 0.96
  • ACD Ref: MCI-WD-05

    Table K1: E4

    Jamb with Proprietary cavity closer

    Y 0.02
    f 0.92
    Jamb with Proprietary cavity closer MCI-WD-05 E4 0.02 0.92
  • ACD Ref: MCI-WD-06

    Table K1: E4

    Jamb with Proprietary cavity closer (Checked)

    Y 0.01
    f 0.96
    Jamb with Proprietary cavity closer (Checked) MCI-WD-06 E4 0.01 0.96
  • ACD Ref:

    Table K1: E16

    External corner

    Y 0.04
    f 0.92
    External corner E16 0.04 0.92
  • ACD Ref:

    Table K1: E17

    Internal corner (Inverted)

    Y -0.06
    f 0.98
    Internal corner (Inverted) E17 -0.06 0.98
  • ACD Ref: MCI-IW-01

    Table K1: E18

    Party wall

    Y 0.03
    f 0.97
    Party wall MCI-IW-01 E18 0.03 0.97
  • ACD Ref: MCI-WD-04

    Table K1: E3

    Sill with Proprietary cavity closer

    Y 0.04
    f 0.83
    Sill with Proprietary cavity closer MCI-WD-04 E3 0.04 0.83
  • ACD Ref: MCI-WD-04

    Table K1: E3

    Concrete Sill with Proprietary cavity closer and PIR Strip

    Y 0.03
    f 0.93
    Concrete Sill with Proprietary cavity closer and PIR Strip MCI-WD-04 E3 0.03 0.93
  • ACD Ref: MCI-WD-04

    Table K1: E3

    Sill with Proprietary cavity closer (Checked)

    Y 0.03
    f 0.88
    Sill with Proprietary cavity closer (Checked) MCI-WD-04 E3 0.03 0.88
  • ACD Ref: MCI-WD-02

    Table K1: E2

    Sperated Lintel with Proprietary cavity closer

    Y 0.03
    f 0.92
    Sperated Lintel with Proprietary cavity closer MCI-WD-02 E2 0.03 0.92
  • ACD Ref: MCI-WD-03

    Table K1: E2

    Steel Insulated Lintel

    Y 0.06
    f 0.94
    Steel Insulated Lintel MCI-WD-03 E2 0.06 0.94
  • ACD Ref: MCI-WD-02

    Table K1: E2

    Sperated Lintel with Proprietary cavity closer (Checked)

    Y 0.01
    f 0.93
    Sperated Lintel with Proprietary cavity closer (Checked) MCI-WD-02 E2 0.01 0.93
  • ACD Ref: MCI-WD-03

    Table K1: E2

    Steel Insulated Lintel (Checked)

    Y 0.05
    f 0.97
    Steel Insulated Lintel (Checked) MCI-WD-03 E2 0.05 0.97
  • ACD Ref: MCI-WD-05

    Table K1: E4

    Jamb with Proprietary cavity closer

    Y 0.02
    f 0.92
    Jamb with Proprietary cavity closer MCI-WD-05 E4 0.02 0.92

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