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Kingspan ULTIMA | Timber Frame Build System

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Kingspan ULTIMA™ Build System

Developed to deliver superior thermal performance, the Kingspan ULTIMA™ Building System not only meets the current building regulations, but exceeds them.

ULTIMA™ offers unrivalled performance in structural timber technology, delivering exceptionally high levels of thermal performance and airtightness practically eliminating cold bridging due to its continuous premium performance Koolthem insulation lining.

Delivering U-Values ranging from 0.15 to 0.10 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 living space in your new home.

Kingspan ULTIMA™ System Benefits

•    Powered by Kingspan Kooltherm® insulation
•    Exceeds building regulations in terms of both thermal and fire performance requirements
•    U Value range 0.15 – 0.10 W/m2K
•    Factory manufactured under strict quality control - quick and easy to install, reducing labour costs and build time
•    Factory pre-fitted Insulation with airtight membrane and integral service void
•    Reduced Cold Bridging, Air Leakage and Drafts
•    Slimmer than any other commonly available build system providing additional space benefits, potentially increasing the value of your home
•    Facilitates a fast build using highly engineered precision manufactured system

Product Information

Thermal performance
Thermal bridging
Fire performance
Delivering U-Values ranging from 0.15 to 0.1 W/m2K, Kingspan 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 living space in your new home.
The internal vapour control layer which is factory fitted in a protected position behind the inner insulation lining of the Kingspan ULTIMA™ also acts as an air-barrier and provides air-tightness to the wall structure. This layer is an important element of the build that helps provide air-tightness to the whole structure. We know from experience that customers using this system should readily be able to achieve a performance under test of 3-1 m3/m2/hr @50Pa. To achieve this level of performance requires a team effort from everyone involved in the construction of your new home including ground workers, plumber, electricians and window installers.
Thermal bridging at external junctions has become a much more important contributor to overall than energy efficiency that it used to be this is because new homes in the UK are now relatively well insulated and reasonably air-tight. To address the heat loss that occurs at these junctions we have prepared thermal bridging calculations that demonstrate the performance of the  Kingspan ULTIMA™ system and help improve the overall energy efficiency of your new home. The calculations for Kingspan ULTIMA™ demonstrate a level of performance that improves significantly over that used in the reference values utilised in SAP – the energy efficiency software used to check compliance with the Building Regulations.
The large scale structural fire testing we have carried out with the Kingspan ULTIMA™ Building System provides our customers with confidence about Building Regulation compliance. 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 level of protection required in most detached residential properties is easily achieved with only a single layer of 12.5mm standard plasterboard fixed in accordance with the manufacturer’s instructions.
The Kooltherm K-range is an extensive range of premium performance phenolic insulants for roof, wall and floor insulation.

Kingspan Kooltherm® 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 commonly used.
•    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).
•    Their closed cell structure resists both moisture and water vapour ingress – a problem which can be associated with open cell materials such as mineral fibre and 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.

Kingspan Kooltherm® Framing Board is certified by the BBA for use between studding and/or as an insulated sheathing over walls of conventional timber-frame buildings and has well defined fire performance characteristics and benefits from testing to a wide range of international standards.

Kingspan Kooltherm® enhanced the fire performance of the Kingspan ULTIMA™ Building System when it was tested in accordance with BS EN 1365:1 2012 - Fire resistance tests for load bearing elements. By incorporating an overlay of Kingspan Kooltherm® insulation between the plasterboard and the structure frame, structural integrity is extended by shielding the structure from the penetrating fire.

Build System Comparison


Kingspan Logic

Kingspan ULTIMA

U-Value (W/m2K) 0.21 0.13 - 0.19  
Thermal Bridging 0.05 0.03 - 0.04  
Air Tightness Range (m3/m2.hr) 3-5 1 to 3  
SAP Fabric Efficiency 17% 24% - 28%  
Psi Values Good Excellent  
Complete wall* 288mm 313-338mm  
Panel thickness 123mm 148 - 173mm  
Cost Hierarchy £ ££  

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Potton Head Office

Eltisley Road

Great Gransden


SG19 3AR

441767 676400