Project Description


Dennis Kelly – Northern Ireland

077 1177 7953

ThermaBeam™ is a precast concrete insulated flooring system that combines both high performance expanded polystyrene (EPS) insulation and structural grade reinforced concrete, forming a continuous layer of insulation across the entire floor.

We manufacture the ThermaBeam flooring system in steel moulds to strict quality standards. The C45/55 structural concrete is cast onto the insulation, eliminating air gaps and minimising heat loss. This provides a significant reduction in cold bridging and results in an evenly spread thermal performance. U-Values as low as 0.11W/m² can be achieved. As the units bear on the inner leaf of cavity walls, a reduction in heat loss can also be achieved at the wall-floor junction because the insulation extends beyond the floor to the face of the wall cavity, ensuring continuity of insulation at the junction.

Therefore, the ThermaBeam™ insulated concrete flooring system is a more thermally efficient method of construction compared to traditional methods as it helps to maximise the thermal performance and energy rating of the building. With a choice of two insulation types available – poly or poly plus, it is the perfect solution for use as a ground floor in domestic and residential buildings.

The ThermaBeam™ flooring system also helps to reduce CO² emissions by decreasing the amount of non-renewable energy required to heat the building, helping to achieve the required Target Emissions Rating (TER).

ThermaBeam™ insulated flooring units are available in a standard depths of 300mm and a choice of four nominal widths – 400, 600, 900 and 1200mm.

Outstanding Thermal Performance

The system integrates structural concrete with expanded polystyrene insulation and the tightly butted units lock in the thermal performance efficiency across the slab.

Part L 2013 Compliance

We offer ThermaBeam in 3 performance options designed to boost your building’s performance with SAP.

Reduced Cold Bridging

ThermaBeam insulated flooring is designed to reduce cold bridging at wall/floor junctions making an important contribution to Part L performance. The Psi values offer an improvement over both the default and approved values within table K1 SAP 2012. Typical Psi value is 0.11W/mK based on ThermaBeam Plus configuration.

Technical Specifications

The ThermaBeam precast insulated flooring system consists of the following components:

EPS – moulded rigid boards in two grades in accordance with BS EN 13163: 2012 (white, λ90/90 = 0.038 and Grey, λ90/90 = 0.030)

Concrete – minimum grade C45/55 to BS EN 206 :2013, BS 8500-1 : 2015 and BS 8500-2 : 2015

Steel reinforcement – to BS 4449: 2005

Ancillary Items

The below items can form part of the overall floor construction:

  • Joint filling – concrete or sand-cement mortar with a strength class C25/30 and maximum aggregate size of 10mm
  • **Concrete floor screed – typically between 25 and 100mm thick
  • **Self-levelling compound
  • **Timber battens – to receive floor finishes
  • **Other suitable non-structural applied floor finishes
  • **Damp-proof courses (dpcs), damp-proof membranes and gas barrier membranes (with third-party approval and compatible with EPS)
  • Telescopic ventilators

**Items supplied by other companies


Suspended floor with 1200mm wide, 300mm deep end bearing unit (EPS70), Uw=0.30Wm-²K-¹ – temperature profile.

300mm ThermaBeam™

All dimensions in mm


Benefits of using ThermaBeam™ insulated flooring

  • Fast installation: Units manufactured offsite and not affected by adverse weather
  • Excellent thermal performance: Due to its superior insulating properties
  • Low U-Values achieved: As low as 0.11W/m² K, based on a P/A ratio of 0.2
  • Higher energy: Efficiency rating achievable
  • Building Regulations compliant
  • Economical: Low on-site costs, zero wastage on-site, minimal on-site labour costs and minimum space required
  • Cast-in service openings*: To facilitate quick installation on site
  • Reduced safety issues: Reduced on-site working
  • Safe working platform: Follow-on trades are achievable within a few hours
  • Low carbon footprint: Since less energy is required to heat building
  • European and British Quality Standards compliant: BBA certified
  • Spans up to 7.5m achievable
  • Flexible design: To meet customer’s design and loading requirements
  • Interstitial and surface condensation risk is minimised

Service openings can only be cast-in during manufacture if their position and sizes are agreed at the design stage.