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Kingspan Ultima™

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 0.17 to 0.14 W/m2K, ULTIMA is slimmer than any other commonly available building system. By using the premium performance Kingspan Kooltherm insulation within a timber structure, ULTIMA offers a slim wall build up, giving you more internal space. System Benefits

  • Powered by Kingspan Kooltherm phenolic premium performance insulation
  • Exceeds building regulations in both thermal and fire performance
  • U-Value range 0.17 – 0.14 w/m2K
  • Factory manufactured under strict quality control, the Kingspan ULTIMA Building System is quick and easy to install – reducing labour costs and build times.
  • Factory pre-fitted insulation with airtight membrane and integral service void
  • Minimises cold bridging and air leakage
  • Slimmer than any other available build system providing additional space benefits, potentially increasing the value of your home

Facilitates a fast and accurate build using a highly engineered, quality controlled manufactured components

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 K12 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.


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/ @ 50pa.  The Air Leakage barrier dressed into openings, allows a simple tape seal to windows, doors and other wall penetrations.


Thermal Bridging

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.

High Performance Homes

Have a design you want to build?

Kingspan Timber Solutions can help you achieve a High Performance Home…

Kingspan Timber Solutions support self-builders who have used an external specialist to create the designs for their new home and obtain planning permission.

With Kingspan, you’re not just buying a timber frame, you are buying access to experience and expertise from a leading self-build service provider. Their timber frame and SIPs construction systems deliver unrivalled levels of thermal efficiency and extremely high levels of airtightness.

Why Choose Kingspan?

Kingspan have over 50 years’ experience in the self-build sector. Larger organisations appreciate their expertise too and they have worked with Barratt Homes, Premier Inn hotels, Center Parcs luxury lodges and many other UK brand names.

Maximise the space and market value of your home and shrink your energy bills by choosing Kingspan Kooltherm based systems. The Kingspan TEK and Ultima systems can satisfy aspirations from building regulations to Passivhaus standard.

Kingspan PLC are financially sound, enabling you to buy with the confidence that your money is safe. As a group of friendly professionals, they will work with you and your architect to help you build a high quality sustainable home.

Our offering

Kingspan provide so much more than a timber frame, they provide a high performance building envelope for your new home.

  • High performance structural building systems – Ultima or Kingspan TEK Building System
  • Windows and joinery – supplied and fitted
  • Insulation pack – Market leading Kingspan Kooltherm
  • Structural engineering and architectural support service
  • Thermal performance strategy – SAP assessment and Energy Performance Certificate
  • Construction work supervised by a Kingspan Contracts Manager

Gain more living space…

Did you know that by using a Kingspan Build System you could gain extra floor space within your existing design? Why not take Kingspan’s Space Test and see how much you could gain? Simply submit your drawings and they will return your space-gain result and a valuation of how much more your finished house could be worth as a result of the extra space

Attend one of Kingspan’s free self-build open days – find out more here