Topcrete Standard dense blocks are extremely robust and durable and can be used in most standard wall applications above and below ground including beam and block flooring. They are available in a range of compressive strengths making them particularly suitable for high strength loadbearing walls. They can also provide high levels of fire resistance and sound insulation.
In addition the strong background they provide makes them ideal to receive plaster finishes and are particularly suited for use where a rendered outer leaf is proposed. They also provide a secure base for fixings.
Topcrete Standard working dimensions
Face dimensions (mm) are 440mm long x (various widths) x 215mm high. Topcrete Midi blocks are 290mm long x 140mm width x 215mm high.
Topcrete Standard sizes and weights
| 75 | 90 | 100 | 140 | 150 | 190 | 215+ | |
| Solid: 7.3, 10.4, 17.5 and 22.5N/mm² | |||||||
| Unit weight (kg) | 14.0 | 17.0* | 18.5 | 26.0 | 28.0* | 35.0* | 40.0* |
| Laid weight (kg/m²) | 148 | 177 | 198 | 275 | 295 | 374 | 423 |
| Solid Midi: 7.3, 10.4, 17.5 and 22.5N/mm² | |||||||
| Unit weight (kg) | 17.3 | ||||||
| Laid weight (kg/m²) | 276 | ||||||
| Cellular**: 7.3N/mm² | |||||||
| Unit weight (kg) | 14.5 | 18.4 | |||||
| Laid weight (kg/m²) | 155 | 194 | |||||
| Cellular Multicore: 3.6, 7.3N/mm² | |||||||
| Unit weight (kg) | 18.5 | ||||||
| Laid weight (kg/m²) | 199 | ||||||
| Hollow: 3.6, 7.3N/mm² | |||||||
| Unit weight (kg) | 17.0 | 27.0 | |||||
| Laid weight (kg/m²) | 180 | 285 | |||||
Unit and laid weights are approximate and calculated based on the specified dry density with 3% moisture content by volume added to provide equilibrium weights.
Other items maybe available subject to minium order quantities.
* Manufactured to order.
** 3.6N/mm² cellular blocks are available from selected plants.
+An alternative way to construct a 215mm wall is to use 100 or 140mm Topcrete blocks laid flat. Alternatively, 190-215mm walls can be built using two leaves of 90mm / 100mm Topcrete back to back and suitably tied. Design guidance on both these methods of construction is given in BS 5628-1 or contact Topblock technical services for advice
Topcrete Standard applications
- Inner leaves of cavity walls
- Outer leaves of cavity walls rendered, or clad
- Cavity separating walls (including specifications to Robust Details E-WM-1 and E-WM-3)
- Internal partitions
- Walls below ground
- Infill units to beam and block flooring
Topcrete Standard environmental performance
Toplite Foundation is manufactured under an ISO 14001 compliant Environmental Management System that is independently certified by BSI. Summary green guide ratings applicable to Toplite aircrete blocks can be found in the BRE Green Guide to Specification http://www.thegreenguide.org.uk/.
Topcrete Standard specification
Mean compressive strength:
- Solid 7.3, 10.4, 17.5 and 22.5N/mm²
- Cellular or hollow 7.3 and *10.4N/mm²
Gross dry density: 1900-2000kg/m³
- Thermal conductivity (at 3% moisture content): 1.28W/mK
- Moisture movement: < 0.5mm/m
- Reaction to fire: Class A1
Topcrete is manufactured to comply with EN 771-3, tolerance category D1, and conforms to Category 1 manufacturing control as specified in BS 5628-1.
