INSUboard is an exceptional choice for challenging applications like roof gardens, parking decks, and flat roof refurbishments. Supreme Petrochem’s XPS boards provide strong thermal protection, load-bearing capacity, and lasting waterproofing in urban projects.
This blog looks at the advantages of INSUboard in these scenarios. We discuss its properties, installation methods, benefits, and Supreme’s reputation as India’s leading insulation company in India.
INSUboard’s Strengths for High-Load Insulation
INSUboard, an extruded polystyrene (XPS) product from Supreme, has a closed-cell structure with a K-value of 0.0289 W/m.K and a compressive strength of 180-500 kPa. Densities of 25 to 40 kg/m³ ensure lightweight yet durable insulation sheets for roofs that experience traffic.
Eco-friendly blowing agents result in water absorption of less than 0.3%, maintaining R-values after immersion crucial for roof gardens. The flame-retardant Euroclass B-s1, d0 is suitable for public buildings.
Overdeck Insulation for Roof Gardens and Green Roofs
Roof gardens need insulation materials that can withstand soil loads, drainage layers, and root pressure. INSUboard Roof Grade (over 300 kPa) is installed over waterproofing and includes a geo-textile separator, staggered boards, a second fabric, HDPE film, and screed or tiles.
Intensive gardens with deep soil use 500 kPa variants; extensive gardens with shallow soil use the lightweight 34 kg/m³ option. This insulation can reduce heat flow by 30-40%, according to BEE, thereby cooling plant substrates.
Supreme addresses gaps that blogs may overlook, including root barriers. INSUboard integrates smoothly into these designs.
Parking Decks: High-Traffic Insulation Sheet Performance
Parking decks must handle dynamic loads from vehicles (10-20 kN/m²); INSUboard Floor Grade (38+ kg/m³, over 500 kPa) endures these pressures using the overdeck method. It protects membranes from cracking, extending their lifespan by over 20 years.
Non-adjustable paver supports elevate permeable surfaces over INSUboard, allowing rainwater to drain. The U-value drops to below 0.4 W/m²K, significantly reducing the need for air conditioning in garages.
Refurbished Flat Roofs: Seamless Retrofit Insulation
Flat roof refurbishments avoid the need for demolition. The underdeck method suspends INSUboard below the slabs using hangers, maintaining waterproofing. Overdeck retrofits can be added on top, with geo-textiles ensuring protection.
INSUboard’s lightweight nature (no crane needed) reduces costs by 20%; quick installation minimises downtime. Supreme’s INSUtiles (EPS hybrids) complement these retrofits.
Spotlight on Supreme Petrochem: India’s Leading Insulation Company
Supreme Petrochem Ltd produces INSUboard in India’s only eco-XPS plant, with a capacity of 300,000 TPA for XPS and EPS. ASTM/ISO grades are customised for roof gardens (high compression), parking (dynamic load), and refurbishments (easy retrofit).
Moisture-proof packaging and custom densities ensure a consistent supply. Innovations like paver-ready boards support NITI Aayog’s sustainability goals.
Installation Steps for Overdeck Insulation
- Waterproof slab per architect’s design.
- Apply 150-200 GSM geo-textile separator (75/100mm laps).
- Stagger INSUboard (use appropriate thickness for U-value).
- Add a second geo-textile.
- Install 300μ HDPE, screed, tiles, or pavers.
Ventilation gaps prevent ponding.
Underdeck Solutions for Refurbished Projects
Hangers secure INSUboard below, making it ideal for retrofits without disruption. Its lightweight nature is suited for seismic zones, and it provides acoustic benefits by reducing footstep noise.
Wall Insulation Synergies in Multi-Use Roofs
INSUboard Wall Grade (180 kPa) works well with roofs in EIFS, providing support for decks with facades. Cavity fills improve the overall energy efficiency of the building insulation envelope.
Benefits: Thermal, Structural, Economic
Insulation lowers heat gain by 25%; it lasts over 50 years compared to EPS, which degrades faster. The return on investment is 2-3 years through 30% savings.
Its lightness reduces foundation loads by 15%.
Comparisons: INSUboard vs Alternatives
| Metric | INSUboard | EPS | Polyiso |
| Comp Strength | 300-500 kPa | <150 | 200-400 |
| Water Abs | <0.3% | 3-5% | 1-2% |
| K-Value | 0.0289 | 0.035 | 0.025 |
| Cost/m² | Medium | Low | High |
INSUboard dominates in high-traffic applications.
Waterproofing Protection in Roof Insulation Material
Overdeck insulation protects membranes from UV and thermal cycling, effectively doubling their lifespan. Geo-textiles filter out fine materials from entering the insulation layers.
Sustainability and Green Certifications
INSUboard uses zero ODP blowing agents and is recyclable, marked as #6. It qualifies for LEED and IGBC credits for energy savings of 20-30%.
Challenges and Solutions
Load verification is managed by Supreme engineers. To prevent root intrusion, barriers are placed on top.
In summary, INSUboard sets a new standard for insulation in roof gardens, parking decks, and refurbishments with exceptional resilience. Supreme Petrochem supports sustainable urban development.
Frequently Asked Questions
Yes, the 300-500 kPa grades support both intensive and extensive designs.
Absolutely, the Floor Grade is designed to withstand vehicular traffic.
Via overdeck or underdeck methods, with geo-textile protection.
Dual geo-textiles and HDPE provide robust protection.
