Cavity Walls: U Values (W/m2k) for Fully Filled Cavity Walls Constructed Using Aircrete Blocks

Inner Leaf: With 2mm Celfix Mortar Joints

Solar

Jumbo Plus

Normal/Plus

Internal Finish

100
(mm)

100 (mm)

115 (mm)

125 (mm)

150 (mm)

50mm Jablite EPS70

Dense plaster

0.33

0.33

0.32

0.31

0.29

Lwt plaster

0.32

0.32

0.31

0.30

0.28

12.5mm plasterboard on dabs

0.31

0.31

0.30

0.29

0.28

50mm Dritherm

Dense plaster

0.32

0.32

0.30

0.30

0.28

Lwt plaster

0.31

0.31

0.30

0.29

0.27

12.5mm plasterboard on dabs

0.30

0.30

0.29

0.29

0.27

65mm Dritherm/IsowoolCWS/Rockwool

Dense plaster

0.28

0.28

0.27

0.27

0.25

Lwt plaster

0.28

0.28

0.27

0.26

0.25

12.5mm plasterboard on dabs

0.27

0.27

0.26

0.26

0.24

75mm Jablite EPS70

Dense plaster

0.27

0.27

0.26

0.26

0.24

Lwt plaster

0.27

0.27

0.26

0.25

0.24

12.5mm plasterboard on dabs

0.26

0.26

0.25

0.25

0.23

100mm DrithermPLUS/Rockwool

Dense

0.22

0.22

0.22

0.21

0.20

12.5mm plasterboard on dabs

0.21

0.21

0.21

0.21

0.20

U-Values for Fully Filled Cavity Walls Using Celcon Standard Aircrete Blocks

Inner Leaf: With 2mm Celfix Mortar Joints

Standard

Jumbo Plus

Normal/Plus

Internal Finish

100
(mm)

100
(mm)

125 (mm)

150 (mm)

50mm Jablite EPS70

Dense plaster

0.35

0.35

0.34

0.32

Lwt plaster

0.35

0.35

0.33

0.31

12.5mm plasterboard on dabs

0.34

0.34

0.32

0.30

50mm Dritherm

Dense plaster

0.34

0.34

0.32

0.31

Lwt plaster

0.33

0.33

0.32

0.30

12.5mm plasterboard on dabs

0.32

0.33

0.31

0.30

65mm Dritherm/IsowoolCWS/Rockwool

Dense plaster

0.30

0.30

0.29

0.28

Lwt plaster

0.30

0.30

0.28

0.27

12.5mm plasterboard on dabs

0.29

0.29

0.28

0.27

75mm Jablite EPS70

Dense plaster

0.29

0.29

0.27

0.26

Lwt plaster

0.28

0.28

0.27

0.26

12.5mm plasterboard on dabs

0.28

0.28

0.26

0.25

100mm DrithermPLUS/Rockwool

Dense

0.23

0.23

0.22

0.22

12.5mm plasterboard on dabs

0.23

0.23

0.22

0.21

U-Values for Fully Filled Cavity Walls Using Celcon Hi-Strength Aircrete Blocks

Inner Leaf: With 2mm Celfix Mortar Joints

Hi-Strength

Jumbo Plus

Normal/Plus

Internal Finish

100
(mm)

100
(mm)

125 (mm)

150 (mm)

50mm Jablite EPS70

Dense plaster

0.37

0.37

0.35

0.34

Lwt plaster

0.36

0.36

0.35

0.33

12.5mm plasterboard on dabs

0.35

0.35

0.34

0.32

50mm Dritherm

Dense plaster

0.36

0.36

0.34

0.33

Lwt plaster

0.35

0.35

0.33

0.32

12.5mm plasterboard on dabs

0.34

0.34

0.33

0.31

65mm Dritherm/IsowoolCWS/Rockwool

Dense plaster

0.31

0.31

0.30

0.29

Lwt plaster

0.31

0.31

0.30

0.29

12.5mm plasterboard on dabs

0.30

0.30

0.29

0.28

75mm Jablite EPS70

Dense plaster

0.30

0.30

0.29

0.28

Lwt plaster

0.29

0.29

0.28

0.27

12.5mm plasterboard on dabs

0.29

0.29

0.28

0.27

100mm DrithermPLUS/Rockwool

Dense

0.24

0.24

0.23

0.23

12.5mm plasterboard on dabs

0.23

0.23

0.23

0.22

Block format:
Normal: 440mm long x 215mm high
Plus: 610mm long x 215mm high
JumboPlus: 610mm long x 270mm high

Block face format as inner leaf x 100mm thick with 2mm joints.

Note: A fully filled cavity wall construction is not suitable for all exposure conditions.

This information has been sourced, reviewed and adapted from materials provided by H + H Celcon.

For more information on this source, please visit H + H Celcon.

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    H + H Celcon. (2019, April 23). Cavity Walls: U Values (W/m2k) for Fully Filled Cavity Walls Constructed Using Aircrete Blocks. AZoBuild. Retrieved on October 13, 2019 from https://www.azobuild.com/article.aspx?ArticleID=7904.

  • MLA

    H + H Celcon. "Cavity Walls: U Values (W/m2k) for Fully Filled Cavity Walls Constructed Using Aircrete Blocks". AZoBuild. 13 October 2019. <https://www.azobuild.com/article.aspx?ArticleID=7904>.

  • Chicago

    H + H Celcon. "Cavity Walls: U Values (W/m2k) for Fully Filled Cavity Walls Constructed Using Aircrete Blocks". AZoBuild. https://www.azobuild.com/article.aspx?ArticleID=7904. (accessed October 13, 2019).

  • Harvard

    H + H Celcon. 2019. Cavity Walls: U Values (W/m2k) for Fully Filled Cavity Walls Constructed Using Aircrete Blocks. AZoBuild, viewed 13 October 2019, https://www.azobuild.com/article.aspx?ArticleID=7904.

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