Masterlite® Ultra

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

BES 6001    CE marking    National Building Specification

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.
  • 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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