NBS Source
Ronafix Underfloor Heating Screed


Ronafix Underfloor Heating Screed is supplied as a pre-packed polymer modified, ready to use mortar for laying floor screeds on underfloor heating systems. Supplied complete as a bag of dry components and a bottle of polymer gauging liquid.


  • Pre-packed formulation for consistent high performance.
  • For use with underfloor heating systems.
  • High early strength and fast drying allows earlier commissioning of heating systems.
  • 45 mm minimum thickness with 16 mm heating pipes.
  • Requires only 25 mm cover over heating pipes.
  • Ready for foot traffic after 24 hours.
  • Rapid drying; can receive floor coverings such as vinyl, tiles and carpet after 10 days at 50 mm thick.
  • Excellent resistance to passage of water and water vapour.


  • Meets the requirements of Category A (Very Heavy Traffic) of BRE Drop Hammer Test in accordance with BS 8204-1:1999.
  • Meets the requirements of BS 8204-1, Category C floating screeds at 45 mm.
  • Unaffected by continued exposure to freeze / thaw cycling.

General information


Pre-packed factory formulated mortar, rapid strength gain, fast drying, faster commissioning of heating

Uniclass 2015

Pr_35_31_06_12 Cementitious levelling screed mixesPrimary


M10/17 Proprietary polymer modified wearing screeds

M10/185 Proprietary polymer modified wearing screeds

Specification data - Cementitious levelling screed mixes

Product Reference

Ronafix Underfloor Heating Screed

Digital objects

Platform Compatible Version Certified to



Revit 2017


Download now from NBS National BIM Library


Ronafix Underfloor Heating Screed Admixture

Ronafix Underfloor Heating Screed Admixture