U-Value (Thermal Transmittance)
Measures heat loss. Lower U-value means superior room thermal retention.
Architect & Estimator Desk
Material Guidance & Specifications
Technical references to guide architects, builders, and developers in selecting, specifying, and checking fenestration systems.
Structural calculations
Indian Basic Wind Speeds (per IS 875 Part 3)
Aperture framing must withstand lateral wind pressure based on geographic basic wind speed indices. High-rise installations require reinforced mullions to avoid structural deflection.
| Geographic Zone | Basic Wind Speed | Profile Recommendation |
|---|---|---|
| Hyderabad, Telangana | 44 m/s (Basic Wind Speed) | AluEdge Medium-Span Framing |
| Mumbai, Maharashtra (Coastal) | 44 m/s (Coastal Damping) | AluEdge Coastal High-Span Series |
| New Delhi (NCR) | 47 m/s (Basic Wind Speed) | AluEdge Medium-to-High Framing |
| Bengaluru, Karnataka | 33 m/s (Lower Exposure) | AluEdge Slimline Standard Series |
Finishing durability
Powder Coating vs. Anodizing
Aluminium extrusions require surface treatment to survive decades of coastal atmospheric dampness and severe UV radiation.
| Process Characteristic | Powder Coating (PVDF) | Anodized Metal Finish |
|---|---|---|
| Primary Coating Process | Electrostatic deposition of dry paint powder, baked to cure. | Electrochemical conversion of surface into aluminium oxide layer. |
| RAL Colors & Textures | Virtually unlimited RAL colors, metallic textures, wood-grain. | Limited to bronze, copper, champagne, black, silver shades. |
| Severe Coastal Durability | Excellent with AkzoNobel or Qualicoat Class 2/3 approvals. | Extremely high. Oxidic skin cannot chip, peel or rust. |
| Scratch Deflection Rating | Good flexibility under structural load stress. | Extremely hard metallic armor. Superior abrasion checks. |
Thermal & lighting index
Glass Performance Metrics Explained
Architects must specify these three key parameters on all facade contracts to balance lighting and heat control.
Solar Heat Gain Coefficient (SHGC)
Fraction of solar radiation entering the room. Lower SHGC limits solar heating.
Visible Light Transmittance (VLT)
Percentage of daylight entering through glass. Higher VLT maximizes room daylight.
Specification consultation
Need Custom Corner CAD Details?
We collaborate with design teams during drawings stages. Our drafting center can supply corner sections, bracket layout blueprints, and wind calculation spreadsheets for reviews.
- IS 875 wind velocity and deflection validation
- Qualicoat / AkzoNobel powder coating specs support