What is SIP?
Material characteristics
Structurally insulated panels (SIP) are a modern wall construction material used for fast construction of comfortable frame-panel buildings that meet all safety and thermal protection standards.
SIP is a durable, environmentally friendly 3-layer construction with excellent insulating properties. It consists of two moisture-resistant boards (OSB), which are connected by a layer of rigid expanded polystyrene foam that meets all the qualitative characteristics of thermal protection, resistance to environmental influences and eco-friendliness of materials. Contrary to the fears, this material is safe in case of fire, due to self-extinguishing components.
SIP components
Let’s look at each layer of a SIP panel

Oriented Strand Board (OSB) is a wood-based board (usually softwood). OSB is 95-97% composed of environmentally friendly wood and 3-5% – of adhesives. The name “oriented strand” means that the main raw material for production is wood strands (flat wooden strips 140 mm long and 0.5-0.7 mm thick), that are aligned (external layers) and perpendicular to the panel’s strength axis (internal layers). This orientation provides high strength of the finished panel, and significantly distinguishes it from other panels.

Polystyrene foam PSB-S-25 (self-extinguishing suspension polystyrene foam) is usually used in SIP-panels as insulation material. It is derived from polystyrene by foaming and stringing the beads together.
This material is characterized by self-extinguishing properties, and complete with flame retardants (components that prevent ignition) OSB plates, able to provide SIP-panels with the necessary fire-prevention properties.
Polystyrene foam today is one of the best materials for thermal insulation of buildings.

Sandwich panel layers are bonded together with high-quality one-component polyurethane glue. This binder has high elasticity, excellent moisture resistance, resistance to influences (of both temperature and solvent chemicals). Bonding (or rather pressing) is carried out under high pressure using an industrial pneumatic press, what makes SIP panels a truly durable and reliable building material.
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