Aluminum Facade and Window Maintenance: Tips to Extend Lifespan

Aluminum Facade and Joinery Maintenance: Cleaning Methods Extending Building Life

 

1. Cleaning: Protection Beyond Aesthetics

Aluminum is a metal with naturally high corrosion resistance. However, atmospheric pollutants, exhaust gases, industrial particles, and marine salt accumulate on the profile surface over time. These deposits not only make the building look dirty but also combine with moisture to create an acidic or alkaline environment that can damage the surface finish (anodizing or powder coating). Regular cleaning is the most critical preventative maintenance to remove this harmful layer and extend the life of the aluminum. In this article, we examine the correct cleaning methods, frequency, and common mistakes in light of international standards (AAMA 609 & 610).

 

2. What Should Be the Cleaning Frequency?

The cleaning schedule depends on the building's geographical location and atmospheric conditions. According to AAMA (American Architectural Manufacturers Association) and Qualicoat standards:

• Rural and Clean Areas: In regions with low air pollution and regular rainfall, rain has a natural washing effect. General cleaning once a year may suffice.
• Urban and Light Industrial: Cleaning every 6 months is recommended in areas with traffic density.
• Coastal and Heavy Industrial: Buildings within 5 km of the sea or industrial zones are in the highest risk group. Salt crystals (sodium chloride) and chemicals accumulate on the surface. In these regions, cleaning every 3 months, or even monthly in some cases, is mandatory. Otherwise, "pitting corrosion" or permanent staining may occur.

 

3. Correct Cleaning Methods and Critical Warnings 3.1. Safe Cleaning Materials

• Water and Soap: The most effective and safe cleaner is warm water and neutral detergents with a pH value between 5 and 8 (e.g., mild dish soap).
• Soft Equipment: Use non-abrasive soft cloths, sponges, or soft-bristled brushes.

 

3.2. Strictly Avoid

• Highly Acidic or Alkaline Chemicals: Cleaners with pH < 5 (acidic) or pH > 8 (alkaline) cause irreversible damage to the aluminum's protective oxide layer or paint. Avoid bleach, hydrochloric acid (muriatic acid), heavy degreasers, and mortar removers.
• Abrasives: Sandpaper, steel wool, razor blades, or hard brushes scratch the surface. These scratches create weak points for corrosion to start.
• Hot Surfaces: Do not clean metal surfaces heated by the sun (above 25°C). Detergent water evaporates rapidly on hot surfaces, leaving chemical stains. Clean early in the morning, late afternoon, or on shaded facades.

4. Post-Construction Initial Cleaning: The Most Critical Phase

The greatest damage to aluminum joinery typically occurs during the initial cleaning after construction ends. Plaster, mortar, lime, or concrete splashes are strongly alkaline. If they contact aluminum, they react rapidly and "burn" the surface.

• Precaution: Such contaminants must be washed off immediately with plenty of water. Trying to scrape them off after drying scratches the surface. Keeping profiles covered with protective tapes throughout construction is the safest method.

 

5. Conclusion

With proper maintenance, aluminum facades and joinery retain their aesthetic and performance for decades. Training building management cleaning teams on "neutral detergents" and "soft washing" is the most economical insurance for the building's envelope. Mertcan Metal products are manufactured with surface treatments complying with international standards and are delivered with protective tape on risky surfaces. However, the sustainability of this quality is entrusted to regular maintenance.