128mm Structural Insulated Panel (SIP) - Sandwich Panel (9mm OSB - 110mm EPS - 9mm OSB) - 1200mm x 2400mm

128mm Structural Insulated Panel (SIP) - Sandwich Panel (9mm OSB - 110mm EPS - 9mm OSB) - 1200mm x 2400mm
Rate this product
128mm Structural Insulated Panel (SIP) - Sandwich Panel (9mm OSB - 110mm EPS - 9mm OSB) - 1200mm x 2400mm
  • Product Code: A1-6265
  • Delivery Time: 4 - 7 days
  • Brand: Various Manufacturers
  • Model: 1200mm x 2400mm - 2.88m2
Our ratings on 26-10-2026:
Google My Business Reviews
4.8 out of 5
Ask question about this product. For price use 'Add to Quote' button.
To GET BEST PRICE for this product only fill below:
Send for Quotation
Need a quote for more products? and continue browsing to find other materials needed.

128mm Structural Insulated Panel (SIP) - Sandwich Panel (9mm OSB + 110mm EPS + 9mm OSB) - 1200mm x 2400mm

Length: 2400mm
Width: 1200mm
Thickness: 128mm
Board coverage: 2.88m2

128mm Structural Insulated Panel (SIP) consist of a 110mm Expanded Polystyrene (EPS) core sandwiched between two 9mm Oriented Strand Board (OSB) sheets. This advanced component offers superior strength, durability, and insulation. The OSB acts as a rigid skin, much like the flanges of an I-beam, while the EPS core prevents them from buckling, creating a monolithic, highly efficient structural unit.

This integrated design ensures high load-bearing capacity and rigidity, making SIPs ideal for walls, roofs, and floors in energy-efficient builds. Manufactured off-site, SIPs reduce on-site labour and speed up construction. Their unique structure minimises stress points and enhances resistance to wind and seismic forces, offering a significantly higher strength-to-weight ratio and overall better performance than traditional timber framing.

The OSB sheets are bonded to the EPS core under high pressure, creating a strong, rigid, and monolithic unit. This sandwich construction offers significant structural advantages. The rigid EPS 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.

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

CHARACTERISTICS

  • Comprises a 110mm thick rigid EPS 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.




118mm Structural Insulated Panel (SIP) - Sandwich Panel (9mm OSB - 100mm Phenolic Core - 9mm OSB) - 1200mm x 2400mm
Guide Price
Brand: Various Manufacturers Model: 1200mm x 2400mm - 2.88m2
Delivery Time: 4 - 7 days
118mm Structural Insulated Panel (SIP) - Sandwich Panel (9mm OSB - 100mm Phenolic Core - 9mm OSB) - 1200mm x 2400mm
118mm Structural Insulated Panel (SIP) comprises a 100mm thick core of rigid Phenolic Core sandwiched between two 9mm thick Oriented Strand Board (OSB) sheets. It is an advanced building component designed for high-performance and energy-efficient construction. This sandwich panel ensures superior s..
Guide Price: £173.87
£208.64 inc VAT
400mm x 130mm Abrasive Tool (Grinder) for Polystyrene EWI boards
Brand: Various Manufacturers Model: 400mm x 130mm
Delivery Time: 1 - 2 days
400mm x 130mm Abrasive Tool (Grinder) for Polystyrene EWI boards
400mm x 130mm Abrasive Tool (Grinder) for Polystyrene EWI boards is used for rasping and smoothing polystyrene boards used for insulating external walls. The abrasive surface shaves off the unwanted sections of the polystyrene sheets to create a flat surface prior to adding the basecoat layer in the..
£24.00
£28.80 inc VAT
3.5x45mm Drywall Screws - Coarse Thread Sharp Point - box of 1000
Brand: Various Manufacturers Model: 3.5x45mm - coarse point
Delivery Time: 1 - 2 days
3.5x45mm Drywall Screws - Coarse Thread Sharp Point - box of 1000
3.5x45mm Coarse Thread Sharp Point high quality screws have been specially developed for fixing plasterboard on to timber frameworks of differing thicknesses, to be used for both wall and ceiling applications in interior and exterior applications. Screw directly into timber, no pre drilling req..
£18.03
£21.64 inc VAT
1.80mm Code 4 Lead Lining Joint Strip - 2400mm x 50mm 1.80mm Code 4 Lead Lining Joint Strip - 2400mm x 50mm
Brand: Various Manufacturers Model: Code 4 - 2400mm x 50mm - 0.12m2
Delivery Time: 3 - 5 days
1.80mm Code 4 Lead Lining Joint Strip - 2400mm x 50mm
1.80mm Code 4 Lead Lining Joint Strips are used to ensure continuous radiation shielding at the joints where lead-lined panels meet. They prevent radiation leakage by covering the gaps and seams between lead-lined plasterboard, plywood, or MDF panels. These strips are crucial in environments requiri..
Stainless Steel Trowel (Float) for Applying Thin Coat Render in EWI Systems.
Brand: Various Manufacturers Model: 13cm/25cm
Delivery Time: 1 - 2 days
Stainless Steel Trowel (Float) for Applying Thin Coat Render in EWI Systems.
Finishing trowel is used in smoothing and finishing the surface of concrete or plaster. It helps to compact the surface and add to the quality and durability of work. It is crafted from the highest quality materials using the best design standards.CHARACTERISTICS:plastic handlelightweight and s..
£16.50
£19.80 inc VAT
5mm Premseal VAP09 Butyl Rubber Mastic Sealant - 6mm x 9.6m roll
Brand: Various Manufacturers Model: 5mm x 6mm x 9.6m
Delivery Time: 1 - 2 days
5mm Premseal VAP09 Butyl Rubber Mastic Sealant - 6mm x 9.6m roll
5mm Premseal VAP09 Butyl Rubber Mastic Sealant - 6mm x 9.6m roll is a high performance pressure sensitive roofing mastic sealing tape. It has excellent adhesion and is highly conformable, good chemical and UV resistance. The tape has an easy release liner which aids application and good movement acc..
This product is listed in the following categories and systems (click to show).