Non-Loadbearing Infill System

Pre-Assembled Frames

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Non-Loadbearing Infill System

Following the outstanding success of Thruwall® – EOS has taken factory prefabrication and preassembly to another level. Our custom-manufactured Pre-Assembled Frames (PAF) are an evolution of Thruwall® which are delivered to site as a unitised non-loadbearing infill system.

Pre-cut, prefabricated and preassembled offsite in controlled factory conditions, these non-loadbearing infill systems encapsulate EOS light steel framing and external Siniat Weather Defence boarding, ready for glass mineral wool insulation and Siniat internal wall linings to be fitted onsite. Installation from inside the structure reduces working at height, mast climber requirements and scaffolding costs. Delivering crucial cost and time benefits making programme savings of up to 30%, the PAF system offers 60-minute fire resistance and provides a 30-year product and performance Etex warranty.

Non-Loadbearing Infill System

PAF Benefits

  • Meets Building Regulation requirements
  • Designed for steel or concrete mainframes
  • Delivered to site as assembled panels
  • Fully tested, performance assured system
  • Installation from inside the structure
  • Delivers programme savings of up to 30%
  • 60 minutes fire resistance 
  • 30-year warranty
  • Rapid installation process
  • Predictable outcomes enhancing occupant safety
  • In-house technical support


Our testing regimes are designed to ensure that our Pre-Assembled Frames give specifiers complete peace of mind knowing that our systems have been subjected to relevant testing for fire, acoustic, weathering, airtightness and mechanical performance.

All our components and products are rigorously tested together as a complete system to ensure compatibility, enabling us to award the technical performance of our Pre-Assembled Frames range with a 30-year Etex warranty which is available following a specification and validation process in which system components may not be substituted.

Read more about our Certified Systems Approach here

Non-Loadbearing Infill System

PAF Specification Guide

Pre-Assembled Frames deliver vast cost and programme savings and ultimately achieve a faster return on investment.

For more information on EOS Pre-Assembled Frames, download the PAF brochure here:

Download here >

If you wish to speak to a member of the technical team:

Call: 01325 303030 Email: