Structural Insulated Panels (SIPs) Construction

Structural insulated panels (SIPs) are increasingly used for projects aiming for the Passivhaus Standard. Read on to find out what makes them so thermally efficient.

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Building SIP Houses

SIPs, short for structural insulated panels, are one of the most thermally efficient methods of construction, and are frequently used to achieve Passivhaus levels of performance. For self builders who want to achieve superior levels of insulation and airtightness, SIPs are the perfect choice. They also have extremely rapid build times, so you can have a short and reliable build schedule compared to other methods of construction like masonry.
Kingspan TEK™ SIP build system

Why SIPs?

Structural Insulated Panels (SIPs) aren't only for those wanting to build a Passivhaus; they're well suited to any self build house design and will deliver high dimensional accuracy, unmatched levels of airtightness, and rapid build times. A SIP structure can be erected in a matter of weeks, delivering your self build to a weathertight stage much sooner than other build methods.

Benefits of Building a SIP House


  • Excellent thermal performance - Lowering energy bills, with the capacity for Passivhaus performance
  • Slim wall build ups - Unlike with a masonry build, the insulation for a SIPs house is already within the walls, which gives your self build valuable extra floor space
  • Strong - Composite panels are self-supporting, and in many cases will not need additional support.
  • Fast - Offers some of the fastest build times, capable of erecting a superstructure in only weeks
  • Warm - Our SIP offering features a rigid polyurethane core which prevents almost all air leakage, achieving excellent airtightness and virtually eliminating thermal bridging
  • Exceed Building Regulations - In both thermal and fire performance
  • Excellent U-Value range - Meaning the amount of air leaking from your home is minimal, proving its efficiency
  • Factory manufactured - Under strict quality control, ensuring dimensional accuracy and further reducing build time 
  • Sustainably sourced timber - The OSB sandwiching the rigid SIP core is sourced from sustainable forests with indepedent chains of custody that are rigorously checked by the relative certification bodies

Colourful umbrella in the rain.

Our Build System Comparison


Kingspan LOGIC+

Kingspan ULTIMA™

Kingspan TEK®

Build System Timber Frame Timber Frame SIPs
U-Value (W/m2K) 0.22-0.16 0.19 - 0.13 0.18 - 0.10
Thermal Bridging (y-value) Typically 0.05-0.03 Typically 0.05 - 0.03 Typically 0.05 - 0.03
Air Tightness Range (m3/ Typically 3-5 Typically 1 to 3 Typically 0.05 to 3
Complete wall* 288mm 313-338mm 332-442mm
Panel thickness 123mm 148 - 173mm 167 - 277 mm
Cost Hierarchy £ ££ £££
*Assuming masonry cladding.
Arial view on a pine wood

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Kingspan Timber Solutions

Kingspan Timber Solutions

Eltisley Road

Great Gransden


SG19 3AR

01767 676400