Fibo 850

  • Ultra Light Weight
  • High thermal Insulation
  • One hand lift
  • Quick and easy to lay
  • Open texture, ideal for plaster and renders
  • High levels of fire protection

Fibo 850 is an excellent light weight house builder block.

Fibo 850 is an ultra lightweight, load-bearing concrete block manufactured from expanded clay aggregates and a mixture of other naturally occurring raw materials and cement.

The clay aggregate is produced from carefully selected clays which through heat expansion are bloated to create a low density porous aggregate with numerous cavities.

This makes Fibo 850 an incredibly light and thermally efficient block, suitable for general purpose walling applications. Ideal for use in housing and extensions.

Features & Benefits

  • High thermal insulation
  • One- hand lift – and quick to lay
  • Good background for direct application of plasters and renders – no bonding agents required
  • Fixings can be easily made and held securely. Ideal back ground for direct nailing
  • High levels of fire protection – up to 2 hours for 100mm loadbearing walls

Technical Info

Net Dry Density: 850 kg/m3

Thermal Conductivity:

0.25W/mK @ 3% moisture content (internal use)

0.28W/mK @ 5% moisture content (external use)

Fibo 850 has an open textured surface which is ideal for applying plaster and render.

It has a face size of 440mm x 215mm in 100mm and 140mm widths and is produced in solid form only.

Fibo 850 is suitable for use in housing and extension projects. It can also be used to construct walls in other buildings where there is a requirement to specifiy blockwork with a low self-weight, eg., partition walls on floor slabs.

  • Inner and outer leaves of external cavity walls
  • Internal walls, including fire break walls
  • Internal walls below ground, such as the inner leaf of external cavity walls and interior walls




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TitleSizeDate modifiedDownload
Fibo 850 1.28 MB03-05-2019 DownloadPreview
Fibo 850 CE Certificate 19.78 KB12-03-2019 DownloadPreview
Declaration of Performance 78.60 KB12-03-2019 DownloadPreview