At GREFET, we benchmark our aluminium window and door systems against internationally recognized testing standards — specifically those defined by ASTM (American Society for Testing and Materials) and BS (British Standards). These tests are not optional. They are a critical part of how we ensure durability, performance, and peace of mind. At GREFET, we understand that how certification elevates window and door quality lies in rigorous, standardized testing that validates these critical functions.
In today’s evolving construction landscape, windows and doors serve far beyond aesthetics — they function as high-performance systems built to withstand environmental forces, enhance energy efficiency, and ensure occupant comfort. That’s why we align our systems with internationally recognized benchmarks.
Let’s explore the five core tests that define the certified performance of GREFET systems:
1. Air Infiltration Test (ASTM E283 / BS EN 1026)
This test measures the amount of air that leaks through a closed window or door when subjected to pressure. Lower air infiltration rates mean better thermal efficiency, reduced energy costs, and superior indoor comfort.
Why it matters:
A well-sealed GREFET window prevents unwanted drafts, improves HVAC performance, and maintains consistent indoor temperatures — crucial in both hot and cold climates.
2. Static Water Penetration Test (ASTM E331 / BS EN 1027)
This test evaluates a system’s ability to resist water ingress under constant pressure. Water is sprayed on the exterior while air pressure is applied inside, simulating heavy rainfall against strong winds.
Why it matters:
GREFET systems are engineered with optimal drainage paths, weather seals, and precision joinery — ensuring no water breaches even during storms or monsoon conditions.
3. Dynamic Water Penetration Test (AAMA 501.1)
Unlike static testing, this test simulates real-world wind-driven rain using a powerful aircraft propeller fan. It’s one of the most advanced methods to verify how systems perform under unpredictable and extreme weather conditions.
Why it matters:
This is the gold standard for high-rise and coastal projects. GREFET’s dynamic test compliance ensures that our systems are suited for urban towers, seafront developments, and cyclone-prone zones.
4. Structural Performance Test (ASTM E330 / BS 6375-2)
This test assesses how a window or door performs under positive and negative pressure loads, simulating strong winds and other forces. The system is subjected to maximum expected wind loads for a project-specific location.
Why it matters:
At GREFET, we reinforce our profiles, interlocks, and anchoring systems to meet high structural standards, ensuring your façade stays secure, rattle-free, and structurally sound for decades.
5. Proof Load Test (Serviceability Testing)
Proof load testing pushes the system beyond its normal operational limits to verify long-term reliability. It confirms whether a unit can bounce back to its original position without permanent deformation.
Why it matters:
This gives end users, architects, and consultants the assurance that GREFET systems can handle unforeseen stresses — from intense weather to years of frequent operation — without warping or failing.
Why These Certifications Are Core to GREFET
Every GREFET window and door system is designed with these standards in mind. Whether it’s our minimal sliding systems, or hinged doors, each product undergoes in-house validation and third-party lab testing based on ASTM and BS protocols.
Our compliance ensures:
- Greater longevity of the system
- Improved energy and sound insulation
- Leak-proof protection against harsh Indian weather
- Enhanced safety in high-rise or exposed conditions
- Streamlined approvals in government and commercial projects
Certified to Outperform
Certification isn’t just a technical checkbox — it’s how we guarantee value, safety, and trust in every system we deliver. At GREFET, we believe quality should be measurable, repeatable, and provable — which is why we embrace globally accepted testing protocols like those from ASTM and BS.
Our systems answer the question of how certification elevates window and door quality — not just in labs, but through their performance on-site, over time, and across seasons.
When you choose GREFET, you’re choosing systems that are certified to last, engineered to perform, and ready for any challenge.
