Air Leakage in Aluminium Windows: Causes and Solutions

 

Air leakage in aluminium windows is amongst the most commonly overlooked problems with modern construction, but it directly impacts comfort, energy efficiency and long-term performance. At GREFET, we design system aluminium windows to eradicate such inefficiencies at the root and not as an afterthought. So, let’s dissect exactly what creates air leakage and how the proper systems mitigate it.

What Does Air Leakage in Aluminium Windows Meant?

Air leakage refers to the uncontrolled flow of air through gaps in a window system. It is often insidious at first but presents itself as time goes on in the following ways:

• It tells you drafts even when windows are closed
• Increased dust ingress
• Higher cooling and heating costs
• Noise penetration

What this actually means is nothing more complicated than: if air can move through something, so too can heat and dust and sound.

Liable Reasons for Air Leakage in Aluminium Windows

1.Poor Fabrication and Installation

Traditional aluminium windows are locally manufactured and not precision engineered. It creates misaligned joints and uneven sealing surfaces.

2. Low-Quality Gaskets and Seals

Low-grade EPDM gaskets shrink up and harden, causing micro pock marks that let air through.

3. Lack of System Design

Non-system windows are built up with each of their parts without running performance tests. Tolerances and joint integrity cannot be controlled.

4. Inadequate Locking Mechanisms

In single-point locking the sash gets pulled against the frame unevenly, leaving gaps when closed.

5. Structural Movement

Over time, buildings settle. Nobody makes any engineered allowances, so windows end up with gaps at the interface.

Why Air Leakage Is Issue to Take Seriously

Leaving air leakage unaddressed isn’t just a matter of mild annoyance. It affects:

• Energy Efficiency: Air exchange increases HVAC load
• Air Quality: Dust and other pollutants penetrate easily
• Insulating Sound: Noise enters the house
• Long-Term Durability: Water can ruin insides

GREFET System Aluminium Windows: The Solution To Air Leakage

At GREFET we take a systems engineering approach to evaluating windows, not just manufacturing products. Here’s how we stop air leakages:

1.Precision-Engineered Profiles

The profiles behind sash and frame are manufactured with identical tolerances.

2. Multi-Point Locking Systems

• Pressure distributed consistently across the window perimeter
• Fills gaps at corners and edges

3. High-Performance EPDM Gaskets

• Retain flexibility over years
• Continue to seal even in the event of a movement

4. Factory-Tested Systems

The system is fully designed and tested for air tightness before it comes on site.

5. Controlled Drainage and Sealing Design

• Keeps air and water from flowing back
• Maintains internal pressure balance

Main Solutions for Avoiding Air Leak (Checklist)

When choosing aluminium windows, ensure they allow:

• Design for system instead of local fabrication
• Multi-point locking hardware
• High-quality EPDM or equivalent gaskets
• Proper installation by trained professionals
• Tested performance for air infiltration

The GREFET Advantage

The difference isn’t always apparent on day one. However, for the next 10-15 years, a properly constructed system window will hold steady in terms of its sealing, performance and comfort levels.

At GREFET we do not respond to problems after the damage is done. With our aluminium window systems, we make sure that they do not happen in the first place.