Timber Casement Windows

— Classic British Elegance, Built to Last
From country cottages to contemporary self-builds, our made-to-measure casement windows combine clean traditional lines with outstanding thermal performance.
The casement window is the most versatile of British window styles — and one of the most demanding to get right. Ours are manufactured from engineered FSC®-certified timber with slim, precise profiles, factory-applied Remmers finishes and high-performance glazing, in flush or stormproof construction to suit the character of your property.
View technical specifications

Made to measure

bespoke sizes, opening configurations
and glazing bar layouts.

Flush or stormproof

minimalist flush finish
or weather-protective overlapping profile.

Outstanding efficiency

glazing U-value from 0.8 W/(m²·K),
warm-edge spacers.

Finished your way

full RAL, NCS and Farrow & Ball palettes,
applied in our factory paint shop.

Flush Casement

The opening sash sits perfectly level within the outer frame, creating the clean, elegant appearance characteristic of traditional British architecture — from Georgian homes to modern extensions.

See specifications →

Casement

Stormproof Casement

The sash overlaps the outer frame, providing additional protection against driving rain and wind — a practical choice for exposed locations, with a subtly different shadow line.

See specifications →

Casement

View technical specifications

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KaruzelaProduktowaCasement2
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Glazing unit:

24-34 mm

Threshold:

HARDWOOD

Pane:

Ug 0.8 W/(m²·K)

Spacer:

WARM

Material:

PINE JOINTED / MERANTI / OAK / SAPELE / ACCOYA

Fitting:

ROTO / TITON

Handle:

WHITE / BLACK / BRASS / CHROME / SATIN CHROME / MONKEY TAIL

Colour:

VARNISH COLORS / RAL / F&B

Gasket:

QLON

Silicone:

WHITE / BLACK / CLEAR / GREY / BROWN

Frame width:

94 mm

Heat Transfer Coefficient:

1.3 W/(m²·K)
1.07 W/(m²·K) (34 mm triple glazing)
Download casement windows spec sheet (PDF)

CAD drawings available on request.

Casement windows in completed projects

Who we work with

Whatever the scale — from a single window to a multi-plot development — we tailor our joinery, logistics and support to the way you work.

Developers & investors

Serial orders for residential schemes, delivered on schedule and adapted to project specifications.

Architects & designers

Technical support at design stage, drawings and bespoke solutions for demanding briefs.

Builders & installation companies

Reliable lead times, transparent logistics and support from first survey to handover.

Private clients

Individually made windows and doors for homeowners who value authenticity and craftsmanship.

Heritage & conservation projects

Faithful recreation of historical joinery, in line with conservation requirements.

Case studies

Tudor Revival Windows
— Surrey

The primary challenge in this architecturally distinct Arts & Crafts / Tudor Revival residence was replacing the extensive joinery across multi-faceted bay windows without compromising the period aesthetic or suffering from thermal inefficiency. The solution was the comprehensive installation of bespoke, dark-framed timber windows and doors with traditional glazing bars, combining meticulous period craftsmanship with advanced energy-efficient glazing. As a result, the striking deep graphite frames create a refined contrast against the pale render, delivering exceptionally warm and quiet interiors while significantly enhancing the property’s overall market value.

Location: Surrey

Year: 2024

Systems: Large Bay Windows, Casement Windows, French Doors (all bi-colour)

View more projects

FAQ

Yes. We have been manufacturing for the British market since 2011 and our transports run to the UK every week. Delivery to London and the surrounding areas is included as standard for other regions delivery is quoted individually. Every order is packed to furniture-grade standard before despatch.
All products are made from engineered, multi-layer timber certified FSC® or PEFC, which ensures dimensional stability and resistance to warping. Available species: pine, oak, meranti, sapele, red grandis and Accoya.
We apply Remmers microporous paints and stains in multiple factory-controlled layers. Full RAL and NCS palettes, Farrow & Ball colours and custom shades are available, as well as translucent stains that show the natural grain.

We provide a 5-year guarantee covering the joinery construction, factory-applied coatings, glazing units and hardware (coatings without a UV filter carry a 2-year guarantee). Full guarantee terms are available on request.

In a flush casement the opening sash closes level with the outer frame, giving a flat, refined elevation typical of period properties. In a stormproof casement the sash overlaps the frame, adding an extra barrier against wind-driven rain — often chosen for coastal or exposed sites.
Our casement range achieves a whole-window U-value of around 1.3 W/(m²·K) with double glazing, improving to 1.07 W/(m²·K) with a 34 mm triple-glazed unit — comfortably meeting current Building Regulations.
Absolutely. Slim engineered-timber profiles, large glazed areas and contemporary colours make casement windows equally at home in modern architecture — with the warmth and sustainability that PVC and aluminium can’t match.
Yes. We manufacture multi-light configurations combining fixed panes, side-hung and top-hung openers, with matching sightlines across the whole elevation — including bay window assemblies.

Request a free,
no-obligation quote

Send us your dimensions, drawings or architectural documentation and our consultants will prepare a tailored offer.

We respond within 48 hours.
Request a quote
Download catalogue

Manufacturing timber joinery since 2011

FSC® & PEFC certified timber

PAS 24:2016 certified systems

5-year product guarantee

Weekly deliveries to the UK