---
title: "Curtain Walls Powder Coating Applications | VeriCoating"
description: "Powder coatings for metal curtain walls and facade panels: super-durable HAA to Qualicoat Class 2 and TGIC to AAMA 2604, ≥90% gloss retention at 1,000h."
language: "en"
page_type: "application_subfield"
canonical: "https://www.vericoating.com/applications/architecture-materials/curtain-walls"
source_url: "https://www.vericoating.com/applications/architecture-materials/curtain-walls"
markdown_url: "https://www.vericoating.com/applications/architecture-materials/curtain-walls.md"
---

# Curtain Walls

Powder coatings for metal curtain walls and facade panels: super-durable HAA to Qualicoat Class 2 and TGIC to AAMA 2604, ≥90% gloss retention at 1,000h.

Parent application: [Architecture & Materials](https://www.vericoating.com/applications/architecture-materials.md)

## Super-durable performance and appearance stability for premium facades

Curtain walls include metal curtain-wall panels, aluminium sheets and other facade elements for high-rise buildings. Direct exposure to rain, ultraviolet radiation and atmospheric pollutants creates demanding super-durable weathering requirements.

Veri Coating offers super-durable polyester-HAA smooth and TGIC textured powders with at least 90% gloss retention after 1,000 hours of xenon-arc exposure, targeting Qualicoat Class 2 or AAMA 2604 where stated in the selected TDS.

Application notes: Decorative surfaces should be protected from contamination and scratches, while film thickness, curing and colour difference must be tightly controlled; the recommended film thickness is 60-120 um.

## Typical Powder Coating Challenges for Curtain Walls

### Insufficient Long-Term Exterior Weatherability

Curtain-wall panels can lose gloss, fade, chalk or become brittle after prolonged exposure to ultraviolet radiation, rain, temperature variation and pollution. A standard-durable system used in a high-irradiance region or beyond its intended design life may fail prematurely despite acceptable initial performance.

Insufficient Long-Term Exterior Weatherability：Long-term exposure causes gloss loss, fading and chalking, requiring a higher weathering class.

[View illustration](https://img.vericoating.com/assets/seo/curtain-walls-insufficient-long-term-exterior-weatherability.webp)

**Formulation Design**

- For premium curtain walls, prioritise a super-durable polyester system with highly weatherable pigments, resins and stabilisers.
- Validate metallic and low-gloss formulations separately; their weathering performance cannot be inferred directly from solid high-gloss systems.

**Process Control**

- Select Class 1 or Class 2 according to project location, orientation, colour and design life.
- Strictly control pretreatment, film thickness and actual part temperature to prevent undercure or overbake.
- Retain reference samples and batch traceability, combining natural exposure and accelerated weathering where necessary.

**Validation Focus**

- Xenon-arc weathering
- Gloss retention and colour difference
- Condensation/damp heat
- Natural-exposure comparison

### Large-Area Colour and Gloss Variation

A small approval panel may pass inspection while the installed curtain wall shows panel-to-panel colour variation, uneven gloss, orange peel or directional differences. Common causes include batch variation, film-thickness differences, uneven oven temperature, changes in spray direction and metallic-pigment orientation.

Large-Area Colour and Gloss Variation：Hue, brightness or gloss variation across large façade panels becomes more visible after installation.

[View illustration](https://img.vericoating.com/assets/seo/curtain-walls-large-area-colour-and-gloss-variation.webp)

**Formulation Design**

- Improve formulation batch consistency by controlling pigment dispersion, particle size and the matting system.
- Minimise cross-batch supply on large projects; for metallic effects, prefer a bonded system and lock the approved standard panel.

**Process Control**

- Standardise substrate batches, pretreatment, hanging orientation, gun settings and cure profiles.
- Plan production batches by façade elevation zone to avoid mixing batches within one field of view.
- Combine instrumental colour and gloss measurement with visual assessment in the actual installation orientation.

**Validation Focus**

- Panel-to-panel colour difference
- Gloss variation
- Oven-temperature uniformity
- Visual consistency in installation orientation

## Talk to a Technician

**Still have questions?** Share your substrate, pretreatment, curing profile, and performance requirements to receive product recommendations.

[Talk to a Technician](https://www.vericoating.com/talk-to-a-technician)