Hangzhou Epsole Machinery Co., Ltd. is one of the most reliable manufacturers and suppliers of polystyrene insulation board in China. We warmly welcome you to buy high quality polystyrene insulation board for sale here from our factory. Good service and reasonable price are available.
Types of Polystyrene Insulation Boards
A. EPS (Expanded Polystyrene) Board
Manufacturing: Steam-expanded beads fused into blocks, then cut into boards.
Structure: Closed-cell, but slightly porous.
Key Properties:
Density: 15–30 kg/m³
R-value: ~3.5–4.0 per inch
Moisture absorption: Moderate (~2–4%)
Cost: Cheapest option
B. XPS (Extruded Polystyrene) Board
Manufacturing: Melted polystyrene extruded into dense foam.
Structure: Fully closed-cell, more uniform.
Key Properties:
Density: 25–45 kg/m³
R-value: ~5.0 per inch
Moisture absorption: Very low (<0.3%)
Cost: 30–50% more expensive than EPS
Comparison: EPS vs. XPS
Property EPS XPS
Thermal Resistance (R-value/inch) 3.5–4.0 5.0
Water Absorption Higher (~2-4%) Very low (<0.3%)
Compressive Strength Moderate (100–250 kPa) High (250–700 kPa)
Cost Lower Higher
Best For Walls, roofs, general insulation Foundations, below-grade, wet areas
Key Applications
Wall Insulation (EPS & XPS) – External/internal walls, cavity walls.
Roof Insulation – Flat roofs, pitched roofs.
Floor Insulation – Underfloor heating, basement slabs.
Foundation Insulation (XPS preferred) – Below-grade, waterproofing.
HVAC & Pipe Insulation – Prevents thermal bridging.
Advantages of Polystyrene Insulation
Excellent thermal insulation (low thermal conductivity).
Lightweight & easy to install.
Moisture-resistant (especially XPS).
Long lifespan (50+ years if protected).
Cost-effective compared to mineral wool or PIR foam.
Limitations
Flammable (requires fire-retardant treatment).
Can be damaged by solvents (e.g., gasoline, acetone).
Not biodegradable (but recyclable).
Installation Methods
Adhesive Fixing (For walls, roofs).
Mechanical Fixing (Using plastic washers & screws).
Friction Fit (For cavity walls).
Underlayment (For floors, beneath concrete).
Thickness & R-Value Guide
Thickness (mm) EPS R-Value XPS R-Value
25 mm ~1.0 ~1.25
50 mm ~2.0 ~2.5
100 mm ~4.0 ~5.0
(Higher R-value = better insulation)
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