Cavity Walls: U Values (W/m2k) for Partially Filled Cavity Walls Constructed using Outer Leaf Render

AZoBuild, The A to Z of Building Technology - H&H Celcon Logo

U-Values for Partially Filled Cavity Walls Using Celcon Solar Aircrete Blocks

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

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

U-Values for Partially Filled Cavity Walls Using Celcon Solar Aircrete Blocks

Inner Leaf: With 10mm Joints

Solar

Jumbo Plus

Normal/Plus

Minimum 50mm Clear Cavity

Internal Finish

100 (mm)

100 (mm)

115 (mm)

125 (mm)

150 (mm)

200 (mm)

40mm Jablite EPS70

Dense plaster

0.36

0.36

0.35

0.34

0.32

0.30

Lwt plaster

0.35

0.36

0.34

0.34

0.32

0.29

12.5mm plasterboard on dabs

0.34

0.34

0.33

0.32

0.31

0.28

20 Kingspan TW50

Dense plaster

0.34

0.35

0.34

0.33

0.31

0.28

Lwt plaster

0.34

0.34

0.33

0.32

0.30

0.27

12.5mm plasterboard on dabs

0.33

0.33

0.32

0.31

0.29

0.27

50mm Dritherm

Dense plaster

0.32

0.32

0.31

0.30

0.29

0.26

Lwt plaster

0.31

0.32

0.30

0.30

0.28

0.26

12.5mm plasterboard on dabs

0.30

0.30

0.29

0.29

0.27

0.25

30mm Kingspan TW50

Dense plaster

0.30

0.30

0.29

0.28

0.27

0.25

Lwt plaster

0.29

0.30

0.29

0.28

0.27

0.24

12.5mm plasterboard on dabs

0.28

0.29

0.28

0.27

0.26

0.24

35mm Celotex CW3000

Dense Plaster

0.28

0.29

0.28

0.27

0.26

0.24

Lwt plaster

0.28

0.28

0.27

0.27

0.26

0.23

12.5mm plaster on dabs

0.27

0.27

0.27

0.26

0.25

0.23

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

 

Inner Leaf: With 10mm Joints

 

Standard

 

 

Jumbo Plus

Normal/Plus

Minimum 50mm Clear Cavity

Internal Finish

100 (mm)

100 (mm)

125 (mm)

150 (mm)

190 (mm)

40mm Jablite EPS70

Dense plaster

0.38

0.39

0.37

0.35

0.32

Lwt plaster

0.37

0.38

0.36

0.34

0.32

12.5mm plasterboard on dabs

0.36

0.36

0.35

0.33

0.31

20mm Kingspan TW50

Dense plaster

0.36

0.37

0.35

0.34

0.31

Lwt plaster

0.36

0.36

0.34

0.33

0.31

12.5mm plasterboard on dabs

0.34

0.35

0.33

0.32

0.30

50mm Dritherm

Dense plaster

0.33

0.34

0.32

0.31

0.29

Lwt plaster

0.33

0.33

0.32

0.30

0.29

12.5mm plasterboard on dabs

0.32

0.32

0.31

0.30

0.28

30mm Kingspan TW50

Dense plaster

0.31

0.32

0.30

0.29

0.27

Lwt plaster

0.31

0.31

0.30

0.29

0.27

12.5mm plasterboard on dabs

0.30

0.30

0.29

0.28

0.26

35mm Celotex CW3000

Dense plaster

0.30

0.30

0.29

0.28

0.26

Lwt plaster

0.29

0.30

0.28

0.27

0.26

12.5 plasterboard on dabs

0.28

0.29

0.28

0.27

0.25

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

 

Inner Leaf: With 10mm Joints

 

Hi-Strength

 

 

Jumbo Plus

Normal/Plus

Minimum 50mm Clear Cavity

Internal Finish

100 (mm)

100 (mm)

125 (mm)

190 (mm)

40mm Jablite EPS70

Dense plaster

0.40

0.40

0.39

0.35

Lwt plaster

0.39

0.40

0.38

0.34

12.5mm plasterboard on dabs

0.37

0.38

0.36

0.33

20mm Kingspan TW50

Dense plaster

0.38

0.39

0.37

0.33

Lwt plaster

0.37

0.38

0.37

0.33

12.5mm plasterboard on dabs

0.36

0.36

0.35

0.32

50mm Dritherm

Dense plaster

0.35

0.35

0.34

0.31

Lwt plaster

0.34

0.34

0.33

0.30

12.5mm plasterboard on dabs

0.33

0.33

0.32

0.29

30mm Kingspan TW50

Dense plaster

0.32

0.33

0.32

0.30

Lwt plaster

0.32

0.32

0.31

0.28

12.5mm plasterboard on dabs

0.31

0.31

0.30

0.28

35mm Celotex CW3000

Dense plaster

0.31

0.31

0.30

0.28

Lwt plaster

0.30

0.31

0.30

0.27

12.5 plasterboard on dabs

0.29

0.30

0.29

0.26

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 x 100m thick, with 10mm joints

Source: H+H Celcon

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

Ask A Question

Do you have a question you'd like to ask regarding this article?

Leave your feedback
Submit