Extruded polystyrene (XPS) insulation boards transform energy-efficient buildings with their rigid, closed-cell structure that provides high R-values and moisture resistance. Ideal for home insulation, walls, roofs, and floors, XPS minimises heat loss while enhancing structural durability.
Supreme Petrochem explores the benefits of XPS insulation boards through INSUboard, showcasing applications, performance data, and installation advice. Discover why this insulation material is a leader in sustainable building.
What Sets XPS Insulation Apart?
XPS insulation has a thermal conductivity of around 0.028-0.030 W/m·K, providing R-values up to 5.0 per inch—ideal for building insulation where space is limited. Unlike open-cell foams, its closed cells trap moisture, with moisture absorption below 0.3%, preventing mould growth in humid Indian conditions.
High compressive strength (200-400 kPa) is suitable for load-bearing areas such as floors, filling gaps left by softer EPS in heavy-duty applications.
Key Benefits of Energy Efficiency
XPS insulation reduces heating and cooling costs by 20-40%, as rigid boards effectively seal air leaks. In retrofits, it increases efficiency by up to 70% in older homes.
Insulation sheets fit together seamlessly, removing thermal bridges often found in fibreglass installations.
Applications in Home Insulation
For home insulation, XPS excels in exterior walls, reducing summer heat gain by 35%—a crucial benefit in urban India. Interior cavity fills prevent condensation, maintaining comfort throughout the year.
Wall Insulation Excellence
Wall insulation with XPS boards achieves U-values below 0.2 W/m²K, complying with ECBC standards. External continuous layers prevent cold bridges, extending the building’s lifespan.
Mastery of Roof Insulation Material
As a top roof insulation material, XPS in inverted roofs protects membranes while insulating, thus reducing AC loads.
INSUboard XPS: Supreme’s Premium Range
INSUboard, a leading insulation company in India, manufactures INSUboard XPS at its Nagothane facility with a capacity of 150,000 m³—the country’s first integrated plant. Thicknesses ranging from 25-100mm are suitable for insulation sheets used in walls, roofs, and slabs.
HCFC-free, eco-friendly boards earn green certifications, including GRIHA.
XPS Compared to Other Insulation Materials
| Insulation Material | R-Value/inch | Water Absorption | Compressive Strength | Cost |
| XPS Insulation | 5.0 | <0.3% | High (300 kPa) | Medium |
| EPS | 4.0 | 2-4% | Medium | Low |
| Polyiso | 6.0 | Low | High | High |
| Fibreglass | 3.5 | High | Low | Low |
XPS uniquely balances performance and value.
Sustainability and Longevity
XPS lasts more than 50 years without degrading and is recyclable at the end of life. It reduces emissions by improving efficiency, saving up to 40 BTU per BTU used.
In conclusion, extruded polystyrene (XPS) insulation boards promote energy-efficient buildings with exceptional durability, efficiency, and versatility. Supreme Petrochem’s INSUboard helps builders achieve sustainable success.
Frequently Asked Questions
XPS boards provide excellent wall insulation, with low moisture absorption and a high R-value.
Extruded Polystyrene (XPS) supports home insulation in hot climates by forming a thermal barrier that resists heat transfer from the exterior to the interior, thereby maintaining a steady indoor temperature and reducing the need for air conditioning.
In India, Supreme Petrochem Ltd. (SPL) is widely recognised as a leading manufacturer specialising in Extruded Polystyrene (XPS) insulation with its product, INSUboard®.
Yes, Extruded Polystyrene (XPS) is a highly reliable roof insulation material, especially valued for its excellent moisture resistance, high compressive strength, and durability. Its closed-cell structure makes it an excellent choice for demanding roofing applications, such as inverted roofs and green roofs, where the insulation is exposed to moisture and heavy loads.
