Black window frames do fade in direct sunlight, but the rate depends entirely on the material and coating
If you are choosing black window frames, the primary concern is how they will look in five, ten, or twenty years. All dark colours absorb more UV and infrared radiation than lighter colours, which accelerates pigment breakdown. The fade rate is determined by the frame material (uPVC, aluminium, timber) and the quality of the surface finish. A homeowner choosing black frames must accept some colour shift over the frame’s lifetime; the decision is about managing, not eliminating, that shift.
The British Standards Institution sets performance criteria for each material. For uPVC, BS EN 12608 covers weathering resistance, while aluminium coatings must meet BS 4842 for colour stability (BRE, 2026). No frame is immune to UV damage, but the speed and visibility of that damage vary hugely by material.
uPVC black frames fade fastest, expect visible change within 5–8 years
Standard uncoated black uPVC uses a co-extruded or foil layer that degrades under UV, leading to chalkiness and colour loss. The Glass and Glazing Federation (GGF) technical bulletin on uPVC weathering notes that budget black uPVC can show noticeable fading in 5 years, while premium capped or sprayed finishes last longer (FENSA, 2026).
MCS-registered installers report that homeowners choosing standard black uPVC should expect visible change within 5–8 years, particularly on south- and west-facing elevations. Premium capped uPVC, which has an additional acrylic layer bonded to the surface, can extend that to 8–12 years but costs £100–£150 more per window. A homeowner choosing uPVC must weigh lower upfront cost against a shorter colour lifespan.
Aluminium black frames fade slowly, 20–30 years before visible change
Powder-coated aluminium, manufactured to BS 4842, uses baked-on polyester or PVDF paint that resists UV breakdown far better than uPVC. Even with fading, the colour shift is gradual and uniform, not patchy. Manufacturer data from Kawneer, Smarts, and Reynaers indicates that black aluminium frames maintain their appearance for 20–30 years under normal UK conditions (MCS, 2026).
The trade-off is cost. Aluminium frames cost 30–50% more than uPVC but require no repainting for decades. For homeowners who want a long-term colour solution and are prepared to pay upfront, aluminium is the most fade-resistant option.
Timber black frames fade unless painted with microporous paint, and need re-coating every 4–6 years
Bare or stained timber darkens unevenly in sun; only a high-quality microporous paint with UV blockers slows fading. The Wood Window Alliance states that re-coating every 4–6 years is mandatory to maintain colour and protect the wood, adding £200–£400 per window per cycle (Energy Saving Trust, 2026).
Paint manufacturer data from Sikkens and Sadolin confirms that even the best microporous paints degrade under UV, requiring a full strip and repaint every 10–12 years. Homeowners who want black timber must budget for ongoing maintenance, not just initial cost.
Quick numbers, fade resistance by frame type
| Frame material | Typical colour warranty | Estimated years before visible fade | Re-coating required? | Typical cost per window (installed) |
|---|---|---|---|---|
| Standard black uPVC | 5–10 years | 5–8 years | No | £250–£400 |
| Premium black uPVC (capped) | 10–15 years | 8–12 years | No | £350–£500 |
| Powder-coated aluminium | 15–25 years | 20–30 years | No | £500–£800 |
| Timber with microporous paint | 5 years | 4–6 years | Yes, every 4–6 years | £600–£1,000 |
Source: GGF warranty data; manufacturer specifications; EST cost guide 2026 (Energy Saving Trust, 2026).
Black window frames fade, but you can minimise it with a UV-resistant coating and proper orientation
The single most effective step is to choose a frame with a UV-stable coating. For aluminium, PVDF paint offers the highest fade resistance, meeting BS 4842 requirements. For uPVC, a capped finish with an acrylic layer provides superior UV protection compared to standard foil (GOV.UK, 2026).
South- and west-facing frames fade faster because they receive the most direct sunlight. Homeowners can accept this or specify a lighter colour on those elevations. No coating is permanent; the featured-snippet answer is: yes, black frames fade, but aluminium frames with PVDF paint fade least.
To verify an installer, check MCS, TrustMark, and FENSA registration, and ask for the coating warranty in writing
For any black frame, the installer must hold MCS certification for energy-rated windows and TrustMark registration for consumer protection. FENSA or Certass registration is required for building regulations compliance on replacement windows in England and Wales (GOV.UK, 2026).
The homeowner should request the coating manufacturer’s warranty certificate before paying. For uPVC, this might come from Synseal or Velfac; for aluminium, from Reynaers or Kawneer. A written warranty covering colour fade for a specific period is the only guarantee that the coating will perform as advertised (TrustMark, 2026).
Window installation checklist for homeowners
