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A new improved addition to the Lignacite family of concrete blocks

A new improved addition to the Lignacite family of concrete blocks

For over seven decades Lignacite concrete block products have been used extensively in many iconic and landmark buildings. Today, these products are still chosen favourites of architects, specifiers and contractors alike.

The newest product in the Lignacite concrete block range is Ash GP, a medium dense concrete block which is robust, durable and suitable for a wide range of walling applications especially within commercial buildings.

With sustainability in mind, Ash GP is manufactured from at least 35% recycled aggregate, conserving valuable sources of primary materials. The fire resistance period for Ash GP (140mm) on non-loadbearing walls is four hours making it an extremely safe block both during the construction phase and for the lifetime of the building.

Ash GP blockwork provides high quality levels of sound insulation between buildings and adjoining rooms making an excellent choice for use within office and educational buildings. It can be used in party wall constructions, based on lightweight blockwork specifications, detailed in Approved Document E to the Building Regulations. It can also be used to construct party walls meeting Robust Detail specifications eg. Robust Details E-WM-2, 4, 8, 11, 14, 17, 20, 21, 22, 27 and 28.

Typically, uses for this block include inner leaf of cavity walls when used with cavity insulation, separating or partition walls, and infill blocks in beam and block flooring systems. It can also be used externally where rendering or cladding is to be applied to the wall. The block also provides a strong background for holding fixings. Ash GP blocks are manufactured with a striated surface to aid the key of plaster and render finishes and is has a face size of 440m x 215mm. It is available in 100mm and 140mm widths in solid form only.

• Mean Unit Strength – 3.6, 7.3 and 10.4N/mm2
• Net Dry Density - 1450 kg/m3
• Thermal Conductivity (W/mK) – 0.47 at 3% moisture
• Reaction to Fire – Class A1

• Suitable for various applications above and below ground
• Good surface key for the direct application of plasters and renders
• Provides a strong background for all types of fixings


Ash GP blocks can be considered for use in the following locations:

• 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 (7.3N/mm2 strength blocks should be used to walls exposed to the external ground)
• Infill units to beam and block flooring

Recent Projects using Lignacite blocks

22 Bishopgate, London designed by PLP Architecture for AXA IM is the tallest tower at the heart of the City of London’s financial district.

The building has been designed with the individual’s well-being in mind, with higher ceilings, increased daylight control, better fresh air and amenities combine to support individuals, in traditional and new ways of working.

Ash GP, together with Lignacite and Lignacrete were used extensively in the construction of the internal walls of the buildings. All three products offering elements of sustainability, sound insulation and strength all key attributes to the design concept of the building.

Google HQ
This new building, combined with the current building at 6 Pancras Square and an additional third building, will create a Google office building with the potential to house 7,000 Google employees. The new building is being developed from the ground up and will contribute to the Knowledge Quarter and King’s Cross’s growing knowledge-based economy.

Waterloo Station Retail Development
Opening in spring 2021, the Waterloo London scheme will feature 40 glass-fronted retail units over three floors in the form of an upmarket shopping mall. The development will also feature a mezzanine and public spaces along a new pedestrianised street called the Waterloo Curve. Lignacite blocks are now being delivered to the project via the main contractor, E H Smith.

For further information about the products and the services offered by Lignacite, please call 01842 810678 or visit Lignacite's website where a comprehensive library of technical information, certificates and other guides may be downloaded for free.

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Lignacite’s block manufacturing plants located in Norfolk and Essex, are responsible for producing over 100,000 blocks per day, enough blocks for building approximately 100 houses. The company works closely with many of the leading builders merchants...
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T(01842) 810678
 01842 810678 Tech Dept.
F(01842) 814602
E[email protected]
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 Head Office, Norfolk House, High St, Brandon, Suffolk, IP27 0AX

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