If you’re planning new windows or doors in 2026, the conversation has moved beyond just style.

Homeowners across Cornwall and North Devon are asking smarter questions about energy performance, ventilation compliance, security standards and long-term durability — alongside design and aesthetics.

Here’s what’s shaping the market this year — and what it means for your home.

1. Slimmer Frames, Larger Glass Areas

Modern glazing in 2026 is defined by clean sightlines and bigger panes of glass.

Homeowners want:

• More natural daylight

• Better connection to gardens and views

• Less visible frame and more glass

Slimline aluminium systems are especially popular for contemporary homes, extensions and coastal properties. At the same time, heritage-style glazing remains strong in period renovations — combining traditional proportions with modern thermal performance.

The key isn’t just how slim the frame looks in a brochure — it’s how the sightlines align across multiple windows and doors once installed.

2. Sliding Doors Continue to Rise

While bifolding doors remain popular, many homeowners are now choosing large sliding patio doors for wider openings.

Why?

• Cleaner external appearance

• Minimal frame stack

• Larger uninterrupted glass panels

• Better furniture layout flexibility indoors

Sliding systems are particularly suited to modern extensions and garden-facing elevations, where the goal is maximum glazing with minimal visual interruption.

The right choice depends on your space, layout and how you want the opening to function.

3. Energy Efficiency Is Now Expected, Not Optional

Energy performance is no longer a “premium upgrade” — it’s the baseline expectation.

Current building regulations for replacement windows in existing dwellings generally require:

• Maximum U-value of 1.4 W/(m²K)
  or

• A minimum Band B Window Energy Rating

That means frame design, thermal breaks, glass specification and installation quality all matter.

In coastal areas like Cornwall, where properties are exposed to wind and driving rain, performance isn’t just about warmth — it’s also about long-term durability and weather resistance.

4. Ventilation Requirements Are Influencing Design

One of the biggest changes in recent years has been ventilation standards.

When replacing windows, homes typically must not reduce existing background ventilation. This often means incorporating trickle vents that meet minimum equivalent area requirements.

In 2026, homeowners are increasingly asking:

• Can vents be colour matched?

• Can they be positioned discreetly?

• Is there a compliant alternative solution?

Good design balances ventilation compliance with aesthetics — something that should be discussed early in the quotation process.

5. Tested Security Standards Matter More

Security conversations have become more specific.

Rather than simply asking “Is it secure?”, homeowners now want to know:

• Is the system tested to recognised standards such as PAS 24?

• Does it meet Secured by Design principles?

This is particularly relevant for ground floor glazing and larger sliding door systems.

High-performance glazing should deliver:

• Robust locking mechanisms

• Reinforced frame structures

• Tested resistance to forced entry

6. Exterior Colours Are Becoming More Timeless

In 2026, we’re seeing a shift toward:

• Neutral greys and soft whites

• Darker anthracite and black accents

• Subtle, matt or satin finishes

The emphasis is on long-term style rather than trend-led colours.

For homes in Cornwall and North Devon, durability of finish is just as important as colour choice, particularly in coastal locations where salt exposure can impact materials over time.

7. Heritage Character with Modern Performance

Many properties across the South West combine traditional architecture with modern upgrades.

Homeowners want:

• Traditional proportions

• Period-style glazing bars

• Slim sightlines

• Modern thermal efficiency

The strongest projects in 2026 are those that respect the property’s character while upgrading comfort and energy performance.

What to Check Before Ordering New Windows or Doors

When comparing quotations, ensure you’re comparing like-for-like:

• Confirm the U-value or energy rating being achieved

• Ask how ventilation compliance will be handled

• Check whether security testing standards apply

• Review sightline drawings — not just brochures

• Understand threshold and drainage detailing for exposed elevations

• Confirm installation standards and certification

Details matter. Performance depends just as much on installation as it does on the product itself.

Planning a Project in 2026?

Whether you’re upgrading existing windows, planning an extension, or designing a new-build home, understanding current glazing trends helps you make informed decisions.

At Camel Glass, we supply and install aluminium, PVC-U and timber windows and doors across Cornwall and North Devon — working with homeowners, builders and architects on both renovation and contemporary projects.

If you’re planning a project this year, our team is happy to guide you through the options and explain what’s right for your property.

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