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Insulating Concrete Roof and Floor Screeds using Expanded Clay
Technical data sheet.
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Use
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Mix by Volume
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Dry Density
kg/m3
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Thermal Conductivity
W/m°C
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Min. Works Cube Strength
N/mm2
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Roof Screeds Dry Ventilated
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1:4 cement/sand topping 32mm thick(minimum '25mm' thick in restricted areas) over dry loose medium or coarse expanded clay
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311 - 417 | 0.11 |
varies with thickness
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| Cement | Sand | Fine Clay | Medium or Coarse Clay | ||||
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Roof Screeds No Fines
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1 | - | - | 10 | 513-562 | 0.17 | 1.8 |
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Floor Screeds Low Fines
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1 |
- |
2 |
5 |
802 - 882 |
0.21 |
2.7-3.5 |
| 1 | 2 | - | 5 | 962 - 1040 | 0.24 | 3.4-5.5 | |
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Building Blocks (to BS2028 1364:1968)
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1 |
- |
3 |
8 |
720 - 1100 | 0.19 - 0.22 | 2.7-7.0 |
| 1 | 2 | - | 10 | ||||
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Fully Compacted Concrete
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1 | - | 3 | 3 | 1040 | 0.24 | 8.6 |
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In-Situ and Precast
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1 | - | 3 | 3 | 1040 | 0.24 | 8.6 |
| 1 | - | 2.5 | 2.5 | 1202 | 0.30 | 10.3 | |
| 1 | - | 2 | 2 | 1284 | 0.35 | 13.7 | |
| 1 | 1.7 | - | 3.3 | 1368 | 0.4 | 15.5 | |
| 1 | 2 | - | 3.5 | 1480 | 0.5 | 17.2 | |
| 1 | 2 | - | 3 | 1530 | 0.55 | 19.2 | |
