What is a flush casement window?

Flush casement windows have the sash sitting level with the outer frame for a clean, timber-style look with no external lip. They come with double or triple glazing for excellent energy efficiency.

Where do flush windows work best?

Ideal for period properties and conservation areas, modern minimalist homes, cottages and design-led new builds. They add kerb appeal while delivering modern performance.

Which frame materials and guarantees are available?

Choose uPVC for a low-maintenance timber look or aluminium for slim, contemporary profiles and powder-coated finishes. Bespoke, made-to-measure options are offered with up to a 20-year guarantee.

What are flush windows?

Name: Flush Windows
Brand: Klassic Trade Frames
Rating: 4.8 (120 reviews)

Flush casement windows offer a sleek, minimalist look ideal for both modern and traditional homes. The sash sits level with the outer frame, creating a clean, flush finish with no external lip.

At Klassic Trade Frames, we manufacture high-quality flush casement uPVC windows that combine timber-style aesthetics with modern glazing, energy efficiency, and durability.

All are available with double or triple glazing, delivering exceptional energy efficiency for every type of home or project.

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Period Properties & Conservation Areas

Authentically replicate timber frames with modern performance. Ideal for heritage homes where planning requirements demand a traditional look.

Modern & Minimalist Homes

Clean lines and subtle detailing suit contemporary architecture perfectly. They provide a sleek, refined aesthetic that complements uncluttered design.

Cottages & Country Homes

Add warmth and charm with classic detailing and realistic woodgrain finishes. Perfect for traditional homes. Our uPVC flush casement windows fit perfectly here.

Design-Led New Builds

Flush frames provide a premium finish that enhances style and value, while flush casement uPVC windows offer the durability and efficiency architects and developers need.

Any Home Seeking Kerb Appeal

Flush frames add style and value, while uPVC flush casement windows offer durability and efficiency. They bring symmetry and a polished look to any home.

Built to Perform, Styled to Last

Our flush windows combine elegant design with cutting-edge performance. Enjoy all year-round comfort, enhanced security, and effortless
upkeep, all wrapped in a sleek, low-maintenance frame that’s built to last through the elements and the test of time.

Energy Efficient

A-rated double or triple glazing paired with airtight seals keeps your home warm, quiet, and cost-efficient all year round.

High Security

Flush doesn’t mean fragile; each window features multi-point locking systems and internal beading for strength and peace of mind.

Low Maintenance

Engineered to resist warping, flaking, and fading. A simple wipe-down keeps them looking flawless for years to come.

Choose Your Frame:
Classic or Contemporary

At Klassic Trade Frames, we offer uPVC and aluminium tilt and turn windows, each combining durability, style, and performance. Whether you prefer classic charm or modern sleekness, here’s a quick comparison to help you choose the right frame for your home.

uPVC

Aluminium

Bespoke, Made-to-Measure & Custom Design

Every Klassic flush window is tailored to your exact specifications. Please choose from our slimmest profiles, a broad palette of modern and heritage colours, and a range of finishes to match your vision, subtle elegance or standout style.

Choose from different frames: Aluminium or uPVC frames
Maintenance: Low maintenance
‍Long-term assurance: Up to 20-year guarantee
Custom finishes: Choose from a wide colour range