About Kingspan Ultima Building System

The ULTIMA Building System offers exceptional performance, delivering high levels of thermal performance and airtightness with a slim profile. ULTIMA can practically eliminates cold bridging due to its continuous premium Kingspan Kooltherm insulation lining.

Delivering U-Values ranging from 0.19 to 0.13 W/m2K, ULTIMA is slimmer than any other commonly available building system. By using the premium performance Kingspan Kooltherm insulation within a timber structure, Kingspan ULTIMA offers a slim wall build up, giving you more internal space.

Kingspan Ultima build system render

ULTIMA Benefits

  • Excellent thermal performance - Lowering energy bills
  • Slimmer than any other available build system providing additional floor space and potentially increasing the value of your home
  • Strong - Architecturally flexible and suitable for multi-storey construction
  • Fast - Facilitates a rapid and accurate build using advanced manufacturing techniques
  • Warm - Powered by Kingspan Kooltherm phenolic premium performance insulation
  • Exceeds building regulations in both thermal and fire performance
  • U-Value range 0.19 - 0.13 w/m2K
  • Factory manufactured under strict quality control, Kingspan ULTIMA Building System is quick and easy to install - reducing labour costs and build times
Kingspan Timber Frame house

Build with us in 3 simple steps...

1. We engineer our frame to your house design
2. We manufacture in our quality controlled factory
3. We construct our frame on site using accredited erector teams


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How does ULTIMA deliver these benefits?

Kingspan Timber Solutions use the exceptional performance characteristic of Kingspan Kooltherm to enhance the performance of its systems.

Kingspan Kooltherm

The Kooltherm K-range is an extensive range of premium performance phenolic insulants for roof, wall and floor insulation.

Kingspan Kooltherm K112 Framing Board with a fibre-free rigid thermoset phenolic insulation core faced on both sides with a low emissivity composite foil facing. By using Kingspan Kooltherm® the thickness of insulation included in external walls can be minimised and the floor space available for use increased.
Kingspan Kooltherm offers the following benefits:

  • With a thermal conductivity of 0.018–0.023 W/m.K these are the most thermally efficient insulation products in common use.
  • The thinnest commonly used insulation products for any specific U–value.
  • Manufactured with a blowing agent that has zero Ozone Depletion Potential (ODP) and low  Global Warming Potential (GWP).
  • The closed cell structure resists both moisture and water vapour ingress, a problem which can be associated with open cell materials such as mineral fibre which can result in reduced thermal performance.
  • Unaffected by air infiltration – a problem that can be experienced with mineral fibre and which can reduce thermal performance.
  • Safe and easy to install – fibre-free core.
  • If installed correctly, can provide reliable long term thermal performance over the lifetime of the building.
Unsure if Kingspan ULTIMA is right for you? Compare Self Build Systems.

Kingspan Ultima Build System Benefits

Product Information

The provision of a dedicated service void maintains the integrity of both the insulation and airtightness of the wall. The Kingspan ULTIMA panel jointing system maintains continuity of airtightness not only at panel to panel junctions but also at critical junctions with foundations, intermediate floors and roof. In whole building airtightness testing ULTIMA has consistently delivered permeability’s less than 2m3/m2.hr @ 50pa.  The Air Leakage barrier dressed into openings, allows a simple tape seal to windows, doors and other wall penetrations.
Continuity of the premium performance Kooltherm Insulation internal lining not only ensures the elimination of thermal bridging within the ULTIMA panels but also at critical junctions with foundations, intermediate floors and roof. Full thermal modelling of critical details has been carried out to optimise thermal efficiency and determine U-Values.

The Kingspan ULTIMA Building System provides enhanced fire resistance performance over standard ‘open panel’ timber frame systems and achieves this by incorporating Kingspan Kooltherm insulation as an internal overlay which protects the structural frame.

The Kingspan ULTIMA Building System exceeds the requirements of Approved Document B Volume 1 with regards to fire resistance when tested in accordance with BS EN 1365:1 1999 and achieved 49 minutes structural integrity using a standard 15 mm plasterboard lining.

Independent fire assessment confirm that Kingspan ULTIMA would achieve 30 minutes fire resistance using a 12.5 mm standard plasterboard lining and should any element of your home require a 60 minute structural integrity, this can be achieved with a 15 mm fire resistant plasterboard.

Kingspan Ultima Build System render

Attention Architects - Download our Construction Details

Designing a project using a high performance offiste build system? Don't base designs on generic construction details - use details developed specificall for the best performaing offsite technology.

Kingspan Timber Solutions Ltd

Eltisley Road

Great Gransden


SG19 3AR

01767 676400