INSUboard Roof Insulation Grade is the ideal roof insulation material for demanding applications, including roof gardens, parking decks, and flat roofs, offering unparalleled thermal performance and load-bearing strength. This extruded polystyrene board protects waterproofing while providing home insulation benefits even in commercial settings.
Supreme Petrochem, via INSUboard, investigates how this roof insulation performs in real-world situations, from resisting moisture to saving energy. Discover practical insights for architects and builders optimising urban structures.
Key Features of INSUboard Roof Insulation
INSUboard Roof Insulation Grade features a low thermal conductivity of 0.0289 W/m·K, making it an excellent thermal insulation sheet for roofs that effectively blocks heat transfer in Indian climates. With a density over 34 kg/m³ and a compressive strength exceeding 300 kPa, it readily supports pedestrian and light-vehicle loads.
As a heat-resistant sheet, it remains stable under UV exposure and temperature fluctuations, with minimal water absorption (<0.5%), protecting underlying layers. These specifications address gaps in traditional insulation that struggle on damp roofs or in gardens.
Perfect for Roof Gardens
Roof insulation in gardens requires waterproof protection and root resistance—INSUboard offers both with its closed-cell XPS design, which prevents membrane damage caused by soil moisture. Intensive or extensive green roofs benefit from their high compressive strength, which supports plant loads without compressing the roof over many years.
Unlike foam boards that degrade, this roof insulation material supports vibrant rooftop ecosystems, reducing urban heat islands by 2-4°C while lowering cooling costs by 20-30%
Strength for Parking Decks
Parking decks require strong roof insulation to support vehicle weights—INSUboard’s >300 kPa rating is suitable for non-structural overlays, distributing loads evenly. Installed over the deck, it insulates the underside while protecting the waterproofing above, potentially increasing the deck’s lifespan by 50%.
This insulation company in India offers a solution that reduces thermal expansion-induced cracks, a common failure in concrete decks.
Versatility for Flat Roofs
Flat roofs benefit from INSUboard roof insulation in inverted systems: boards placed over waterproofing with geotextile separators act as dual-purpose barriers. Simulations forecast energy savings of 25-35% in air-conditioning loads for high-rise buildings in Mumbai.
Paver blocks or screeds finish seamlessly, making them ideal for refurbishments where access is limited beneath the deck.
Thermal Performance Breakdown
| Feature | INSUboard Value | Benefit |
| K-Value | 0.0289 W/m.K | 80% heat block |
| Compressive Strength | >300 kPa | Vehicle/pedestrian safe |
| Water Absorption | <0.5% | Waterproof protection |
| Density | >34 kg/m³ | Lightweight install |
This thermal insulation sheet for roofs performs better than mineral wool in areas prone to moisture.
Energy Efficiency Improvements
Roof insulation, such as INSUboard, reduces electricity bills by stabilising indoor temperatures and reducing cooling needs during peak summer months. Home insulation also extends to commercial flat roofs, complying with India’s ECBC standards for green buildings.
Long-term R-value stability prevents the degradation observed in fibreglass.
Durability and Low Maintenance
Heat-resistant sheet properties withstand freeze-thaw cycles and chemicals, making it ideal for exposed decks. A 50-year lifespan reduces callbacks, unlike bitumen, which cracks.
INSUboard: Supreme Petrochem’s Innovation
As a leading insulation company in India, Supreme Petrochem’s INSUboard Roof Grade uses GPPS-based extrusion to produce precise boards ranging from 25 to 100mm thick. Designed for overdeck, underdeck, and green roofs, it includes geotextiles for secure, reliable installations.
From Nagothane plants, it supports sustainable projects nationwide.
Over-Deck Installation Best Practices
- First, ensure the roof is fully prepped with the waterproofing treatment as advised by your architect or consultant – it needs to be completely leak-proof.
- Next, roll out a 150-200 GSM polypropylene or polyester geotextile fabric as a separator over the waterproofing, overlapping by 75 mm along the length and 100 mm across for full coverage.
- Lay INSUboard thermal insulation boards in a staggered pattern on top, choosing the right thickness to hit your target R or U value.
- Add another layer of 150-200 GSM geotextile fabric over the insulation, again with proper overlaps.
- Top it off with a 300-micron HDPE film, then finish with cement screed, tiling, or whatever surface you prefer.
- Or, for easier access, just place paver blocks or precast cement tiles loosely using adjustable or fixed pedestals to create a walkable roof deck.
Sustainability Benefits
Recyclable XPS reduces embodied carbon; green roofs with roof insulation enhance biodiversity credits. Complies with GRIHA ratings.
Cost-Benefit Analysis
Initial expenditure is recouped within 2-3 years through energy savings—ROI of 15–30% compared to alternatives such as PIR foam.
Comparison with Alternatives
| Material | Water Resistance | Strength | Cost/ROI |
| INSUboard Roof Insulation | Excellent | High | Best |
| EPS | Good | Medium | Medium |
| Mineral Wool | Poor | Low | Poor |
Fills the market gap with durable, affordable roof insulation material.
In summary, INSUboard Roof Insulation Grade improves roof gardens, parking decks, and flat roofs by enhancing thermal performance, strength, and durability. Supreme Petrochem’s expertise makes it the wise choice for long-lasting, efficient constructions.
Frequently Asked Questions
The roof insulation grade is suitable for gardens, decks, and flats due to its load-bearing capacity and waterproofing.
A thermal insulation sheet for roof conserves energy by forming a barrier that slows heat transfer, keeping buildings cooler in summer (blocking heat entry) and warmer in winter (trapping heat inside). This significantly reduces the workload on HVAC systems for heating and cooling, leading to lower energy use and bills. These sheets, often containing trapped air, act as barriers to heat flow by conduction, convection, and radiation.
Yes, INSUboard is suitable for use in car park applications as part of a properly designed floor or roof insulation system. It is a rigid extruded polystyrene (XPS) board with properties that make it highly effective for such uses.
Start by applying the waterproofing treatment exactly as your architect or consultant advises to ensure the surface is fully watertight—no shortcuts, as it protects everything beneath.
For easy access, loosely lay paver blocks or precast tiles on adjustable pedestals over the HDPE membrane to create a sturdy, ventilated deck without heavy screeding.
