Cavity Walls: U Values (W/m2k) for Fully Filled Cavity Walls Constructed Using Rendered Outer Leaf 1

Inner Leaf: With 10mm Joints

Solar

Jumbo Plus

Normal/Plus

Internal Finish

100
(mm)

100 (mm)

115 (mm)

125 (mm)

150 (mm)

50mm Jablite EPS70

Dense plaster

0.41

0.41

0.40

0.38

0.36

Lwt plaster

0.40

0.40

0.39

0.38

0.35

12.5mm plasterboard on dabs

0.38

0.39

0.37

0.36

0.34

50mm Dritherm

Dense plaster

0.39

0.39

0.38

0.37

0.35

Lwt plaster

0.38

0.37

0.37

0.36

0.34

12.5mm plasterboard on dabs

0.37

0.37

0.36

0.35

0.33

65mm Dritherm/IsowoolCWS/Rockwool

Dense plaster

0.34

0.34

0.33

0.32

0.31

Lwt plaster

0.33

0.34

0.32

0.32

0.30

12.5mm plasterboard on dabs

0.32

0.33

0.31

0.31

0.29

75mm Jablite EPS70

Dense plaster

0.32

0.32

0.31

0.31

0.29

Lwt plaster

0.32

0.32

0.31

0.30

0.29

12.5mm plasterboard on dabs

0.31

0.31

0.30

0.29

0.28

100mm DrithermPLUS/Rockwool

Dense/lwt plaster

0.25

0.26

0.25

0.25

0.24

12.5mm plasterboard on dabs

0.25

0.25

0.24

0.24

0.23

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

Inner Leaf: With 10mm Joints

Standard

Jumbo Plus

Normal/Plus

Internal Finish

100
(mm)

100

(mm)

125 (mm)

150 (mm)

50mm Jablite EPS70

Dense plaster

0.44

0.44

0.42

0.40

Lwt plaster

0.43

0.43

0.41

0.39

12.5mm plasterboard on dabs

0.41

0.42

0.39

0.37

50mm Dritherm

Dense plaster

0.42

0.42

0.40

0.38

Lwt plaster

0.41

0.41

0.39

0.37

12.5mm plasterboard on dabs

0.39

0.40

0.38

0.36

65mm Dritherm/IsowoolCWS/Rockwool

Dense plaster

0.36

0.36

0.35

0.33

Lwt plaster

0.35

0.36

0.34

0.32

12.5mm plasterboard on dabs

0.34

0.34

0.33

0.31

75mm Jablite EPS70

Dense plaster

0.34

0.34

0.33

0.31

Lwt plaster

0.33

0.34

0.32

0.31

12.5mm plasterboard on dabs

0.32

0.33

0.31

0.30

100mm DrithermPLUS/Rockwool

Dense/lwt plaster

0.27

0.27

0.26

0.25

12.5mm plasterboard on dabs

0.26

0.26

0.25

0.24

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

Inner Leaf: With 10mm Joints

Hi-Strength

Jumbo Plus

Normal/Plus

Internal Finish

100
(mm)

100

(mm)

125 (mm)

150 (mm)

50mm Jablite EPS70

Dense plaster

0.46

0.47

0.44

0.42

Lwt plaster

0.45

0.45

0.43

0.41

12.5mm plasterboard on dabs

0.43

0.43

0.41

0.39

50mm Dritherm

Dense plaster

0.44

0.44

0.42

0.40

Lwt plaster

0.43

0.43

0.41

0.39

12.5mm plasterboard on dabs

0.41

0.41

0.39

0.38

65mm Dritherm/IsowoolCWS/Rockwool

Dense plaster

0.38

0.38

0.36

0.35

Lwt plaster

0.37

0.37

0.36

0.34

12.5mm plasterboard on dabs

0.36

0.36

0.34

0.33

75mm Jablite EPS70

Dense plaster

0.35

0.36

0.34

0.33

Lwt plaster

0.35

0.35

0.34

0.33

12.5mm plasterboard on dabs

0.34

0.34

0.32

0.31

100mm DrithermPLUS/Rockwool

Dense/lwt plaster

0.28

0.28

0.27

0.26

12.5mm plasterboard on dabs

0.26

0.27

0.26

0.25

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

440 x 215 x 100mm blocks with 10mm 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.

Citations

Please use one of the following formats to cite this article in your essay, paper or report:

  • APA

    H + H Celcon. (2019, April 23). Cavity Walls: U Values (W/m2k) for Fully Filled Cavity Walls Constructed Using Rendered Outer Leaf 1. AZoBuild. Retrieved on May 30, 2024 from https://www.azobuild.com/article.aspx?ArticleID=7900.

  • MLA

    H + H Celcon. "Cavity Walls: U Values (W/m2k) for Fully Filled Cavity Walls Constructed Using Rendered Outer Leaf 1". AZoBuild. 30 May 2024. <https://www.azobuild.com/article.aspx?ArticleID=7900>.

  • Chicago

    H + H Celcon. "Cavity Walls: U Values (W/m2k) for Fully Filled Cavity Walls Constructed Using Rendered Outer Leaf 1". AZoBuild. https://www.azobuild.com/article.aspx?ArticleID=7900. (accessed May 30, 2024).

  • Harvard

    H + H Celcon. 2019. Cavity Walls: U Values (W/m2k) for Fully Filled Cavity Walls Constructed Using Rendered Outer Leaf 1. AZoBuild, viewed 30 May 2024, https://www.azobuild.com/article.aspx?ArticleID=7900.

Tell Us What You Think

Do you have a review, update or anything you would like to add to this article?

Leave your feedback
Your comment type
Submit

While we only use edited and approved content for Azthena answers, it may on occasions provide incorrect responses. Please confirm any data provided with the related suppliers or authors. We do not provide medical advice, if you search for medical information you must always consult a medical professional before acting on any information provided.

Your questions, but not your email details will be shared with OpenAI and retained for 30 days in accordance with their privacy principles.

Please do not ask questions that use sensitive or confidential information.

Read the full Terms & Conditions.