Masterlite® Ultra

A low weight concrete building block designed for thermal efficiency and manual handling considerations. 

BES 6001        

Features and benefits

Lightweight, robust, load bearing units manufactured using Class 1 aggregate for fire resistance
Provides an excellent key for plastering and rendering
Masterlite Ultra was developed specifically to be used as a one handed lift application.
Can be used for block and beam flooring (7.3N/mm²)
  • Masterblock
  • Concrete
  • Education and healthcare
  • High-rise
  • Industrial and commercial
  • Non-residential
  • Residential
  • Buildings
Product category
  • Building products
  • Blocks
  • Light
Product data
Size(mm) 440x215
Thickness(mm) 100
Density(kg/m3) 850
weight(kg) 6.28
Units/m(approx) 9.88
Colours available Natural
Finish Standard


  • Suitable for use above and below dpc internally and above dpc externally
  • These units are not tested for transverse loading and as such, are NOT suitable for beam & block flooring
  • Masterlite Ultra blocks cannot be used in party walls and are restricted for use in flanking wall types E-WM-2, E-WM-4 & E-WM-11 (Medium density) when using Robust Details
  • Standard – Suitable for locations where the surface will not be seen, i.e. plastered or rendered
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