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Ash GP Concrete Blocks
BSI Kitemark
Certificate type
General purpose, medium density concrete blocks.
Suitable for use in commercial and housing projects. Can be used to construct internal walls in commercial, industrial and leisure buildings. The blocks can be used for the following:
- The inner and outer leaves of external cavity walls.
- Internal walls including fire break walls.
- Separating walls including those conforming to Robust Detail specifications.
- External and internal walls below ground (3.6 N/mm² blocks can be used in both inner leaf and internal walls; 7.3 N/mm² blocks to other locations).
- Infill units to beam and block flooring.
The blocks can accommodate drylining, dense plaster, finishing coats and external rendering. Consult manufacturer for further finish recommendations.
Medium density, load bearing concrete blocks, suitable for facing and general purpose applications. The blocks consist of a specially formulated mix which reduces density, producing a solid block under 20 kg unit weight.
The blocks are medium grey in colour with a fine textured/ scratched surface, providing an enhanced key for plastering and rendering. Available in 100 and 140 mm widths, solid form only.
Features and benefits:
- Robust and durable.
- Good surface key for the direct application of plasters and renders.
- For use internally and externally, above and below ground.
- High levels of air tightness, sound insulation and fire resistance.
- Provides a strong background for holding fixings.
- Over one-third of the materials come from sustainable sources.
- Credits available under BREAAM and Code for Sustainable Homes.
- CE marked to BS EN 771-3.
- Can be used to satisfy the requirements of Part L of the Building Regulations.
The mortar type for work above ground level should be designation (iii) / Compressive Class M4. Stronger mixes may be used only with the permission of the designer. Stronger mixes may also be required for work below ground in accordance with PD 6697. Consult manufacturer for details.
Movement joints should be considered in accordance with PD 6697 at approximately 6 m spacings. In areas of concentrated stress, such as those above and below openings, consideration should be given to the use of bed joint masonry reinforcement.
The design of walls should be in accordance with relevant design standards including BS 8103: 2, BS EN 1996-1-1 and the requirements of the Building Regulations.
Application:
Suitable for use in commercial and housing projects. Can be used to construct internal walls in commercial, industrial and leisure buildings. The blocks can be used for the following:
- The inner and outer leaves of external cavity walls.
- Internal walls including fire break walls.
- Separating walls including those conforming to Robust Detail specifications.
- External and internal walls below ground (3.6 N/mm² blocks can be used in both inner leaf and internal walls; 7.3 N/mm² blocks to other locations).
- Infill units to beam and block flooring.
The blocks can accommodate drylining, dense plaster, finishing coats and external rendering. Consult manufacturer for further finish recommendations.
| Features | Good technical performance, high recycled content |
| Finish | Scratched surface |
| Material | Concrete |
| Shape | Rectangular block |
| Size | 440 x 100/ 140 x 215 mm |
| Uniclass 2015 | |
| CAWS | E60/297 Proprietary infill blocks F10/18 Concrete facing blockwork F10/355 Concrete common blockwork |
| Product Reference | Ash GP Concrete Blocks |
| Standard | BSI Kitemark approved to BS EN 771-3 |
| Block description | Medium density, load bearing block for general purpose walling applications |
| Appearance | Scratched surface to aid the key of plaster and render finishes |
| Configuration | Group 1 |
| CompressiveStrength | - |
| Category | M4 |
| ThermalConductivity | 0.47 W/m·K at 3% moisture content (internal use), 0.51 W/m·K at 5% moisture content (external use) |
| Thermal resistance | At 3% moisture content: 100 mm width: 0.212 m²K/W, 140 mm width: 0.298 m²K/W. At 5% moisture content: 100 mm width: 0.196 m²K/W, 140 mm width: 0.274 m²K/W |
| Recycled content | Minimum 35% |
| Tolerance category | D1 |
| Density | - |
| Net dry density | 1450 kg/m³ |
| Reaction to fire | Class A1 |
| Water vapour permeability | 5/15 µ |
| Work sizes (length x width x height) | 440 x 100 x 215 mmUnit weight: 14 kg. 440 x 140 x 215 mmUnit weight: 19.6 kg. |
| Compressive strength options: | 3.6 N/mm²7.3 N/mm²10.4 N/mm² |
| Moisture movement | <0.5 mm/m |
| SpecificHeatCapacity | 1000 J/kg/K |
| Sound reduction index | At 100 mm width: 44–45 RW dB (dependent on application) |
| Fire resistance | 100 mm: 2–3 hours; 140 mm: 3–4 hours |
| Standard product features | Colour: Grey. Features: Good technical performance, high recycled content. Finish: Scratched surface. Material: Concrete. Shape: Rectangular block. Size: 440 x 100/ 140 x 215 mm. |
| Recycled content | Minimum 35% |