How Long Do Rooflights Last?

Expert Advice from Horizon Windows & Doors

Rooflights are a stunning way to flood your home with natural light, but longevity is an important consideration for homeowners, architects, and building professionals. If you’re planning to invest in a high-quality rooflight, you’re likely wondering how long they last and how to maximise performance.

At Horizon Windows & Doors, we supply and install premium rooflights and skylights designed for durability, energy efficiency, and long-term reliability across Fleet, Hampshire, Surrey and surrounding areas.

Average Lifespan of Rooflights

So, how long do rooflights last? The answer depends largely on build quality, materials, installation, and maintenance. Generally, properly installed and well-maintained rooflights or skylights last 10–20 years on average.

However, high-end aluminium rooflights supplied by Horizon Windows & Doors can often achieve 20–25 years or more, especially when manufactured with durable materials and fitted by experienced professionals.

Lower-quality skylights may begin to show problems such as leaks, failed seals, or misted glazing after 8–15 years. Investing in a premium rooflight system from the outset significantly improves lifespan and performance.

Key Factors That Affect Rooflight Longevity

Build Quality

The most important factor in rooflight lifespan is overall manufacturing quality. At Horizon Windows & Doors, our aluminium rooflights are engineered using high-grade materials, robust seals, and advanced glazing technology.

Cheaper roof lanterns often use lower-grade components that can deteriorate faster, leading to earlier replacement. As industry professionals know, not all rooflights are created equal quality pays for itself over time.

Professional Installation

Even the best rooflight can fail prematurely if installed incorrectly. Expert installation ensures the unit is fully watertight, properly flashed, and correctly integrated into your roof structure.

Our experienced installation team at Horizon Windows & Doors ensures every rooflight in Fleet, Hampshire and Surrey is fitted to precise specifications, helping prevent:

• Water ingress
• Draughts
• Frame stress
• Premature seal failure

Poor installation is one of the leading causes of rooflight problems.

Environmental Conditions

UK weather can be demanding. High winds, heavy rain, and temperature changes all impact rooflight durability. Coastal areas with salt air can also accelerate corrosion in lower-quality systems.

That’s why Horizon Windows & Doors recommends powder-coated aluminium rooflights with toughened glass, which offer excellent resistance to:

• UV exposure
• Temperature fluctuations
• Storm damage
• Corrosion

Aluminium vs uPVC Rooflights: Which Lasts Longer?

Choosing the right frame material is crucial for long-term performance.

Aluminium Rooflights

Aluminium rooflights are widely considered the premium, long-lasting choice. They:

• Do not rust or warp
• Maintain structural strength
• Withstand harsh weather
• Require minimal maintenance

A quality aluminium rooflight installed by Horizon Windows & Doors can last 25+ years with proper care. Powder-coated finishes also resist fading and keep frames looking modern for decades.

For homeowners in Fleet, Hampshire and Surrey seeking a long-term investment, aluminium rooflights offer the best durability and value.

uPVC Rooflights

uPVC rooflights remain popular due to lower upfront cost and good insulation. However, compared with aluminium, they typically have a shorter lifespan.

Over time, uPVC frames may:

• Discolour in sunlight
• Warp with heat exposure
• Become brittle

With proper maintenance, uPVC rooflights may last 10–20 years, but aluminium generally outperforms them for longevity and structural stability.

Glass, Seals and Coatings Matter

Modern rooflights rely heavily on glazing technology and sealing systems.

High-performance glazing (double or triple glazed) can last decades, but seal failure is often the first issue to appear. Premium rooflights supplied by Horizon Windows & Doors use robust glazing units designed to minimise:

• Condensation between panes
• Heat loss
• UV damage

Quality EPDM or silicone gaskets also play a vital role in keeping your rooflight airtight and watertight.

Maintenance Tips to Extend Rooflight Life

Rooflights are low maintenance, but simple care makes a big difference.

To keep your rooflight performing at its best:

• Clean glass and frames twice yearly
• Remove leaves and debris from surrounding areas
• Inspect seals and flashing periodically
• Use mild soapy water (avoid harsh chemicals)
• Check opening vents operate smoothly

Regular checks help spot small issues before they become costly repairs.

When Should You Replace a Rooflight?

Even the best rooflight won’t last forever. You may need replacement if you notice:

• Persistent leaks
• Misted or failed glazing
• Frame discolouration or warping
• Draughts around the unit
• Units over 20 years old

Modern rooflights offer significantly improved thermal efficiency, slimmer sightlines, and better UV protection, making upgrades worthwhile.

Contact Horizon Windows & Doors

If you’re considering a new rooflight installation in Fleet, Hampshire or Surrey, Horizon Windows & Doors can help. We supply and install high-quality aluminium rooflights designed for long-lasting performance, energy efficiency, and contemporary style.

Contact our expert team today to discuss your project and discover how we help homeowners across Hampshire and Surrey bring more natural light into their homes.