138mm Structural Insulated Panel (SIP) - Sandwich Panel (9mm OSB + 120mm PIR + 9mm OSB) - 1200mm x 2400mm

138mm Structural Insulated Panel (SIP) comprises a 120mm thick core of rigid Polyisocyanurate (PIR) insulation sandwiched between two 9mm thick Oriented Strand Board (OSB) sheets. The OSB sheets are bonded to the PIR core under high pressure, creating a strong, rigid, and monolithic unit. This sandwich construction offers significant structural advantages. The rigid PIR core acts as a strong, lightweight load-bearing element, distributing forces evenly across the entire panel. The OSB sheets, bonded to the core, provide a continuous surface, significantly increasing the panel's shear strength and resistance to racking (lateral movement).

In traditional timber frame construction, stress concentrations can occur at the joints where individual members connect. The monolithic nature of the SIP minimises these stress points, leading to a more robust and less prone to failure.

The integrated design of the SIP creates a highly rigid diaphragm, which effectively resists wind loads, improving the overall structural stability of the building. The high shear strength and stiffness of the SIP make it more resistant to the lateral forces generated by earthquakes. The SIP's strength lies in its integrated design. By combining the insulating properties of PIR with the structural strength of OSB, the resulting panel exhibits significantly higher strength-to-weight ratio and superior structural performance compared to traditional timber framing or individual components used in isolation.

SIPs are manufactured off-site in a controlled factory environment. This minimises the number of individual components to be installed. This reduces the need for extensive on-site framing and sheathing. The faster construction process translates to reduced labour costs and a quicker project completion timeline.

Note: Our SIP panels are level on all sides - if you want incuts in the PIR, please let us know.

CHARACTERISTICS

• Comprises a 120mm thick rigid PIR insulation core.
• Sandwiched between two 9mm thick OSB sheets.
• Components bonded together under high pressure, forming a monolithic unit.
• Even distribution of forces across the panel.
• Continuous OSB surface enhances shear strength and resistance to racking.
• Minimises stress concentrations common in traditional timber frames.
• Highly rigid diaphragm resists wind loads effectively.
• Improved overall building stability.
• Enhanced resistance to lateral forces from earthquakes.
• Superior strength-to-weight ratio compared to traditional timber framing.