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Heritage & Conservation Glazing

Bespoke Timber Sash Windows


Heritage profiles, Part L thermal performance, Part Q security - engineered into every frame. Not off-the-shelf. Not PVC. Not a compromise.

Explore Window Types

01 - Sash Windows

Box Sash & Spiral Balance


The definitive choice for Georgian, Victorian, and Edwardian properties. Vertically sliding sash windows with traditional weighted box or modern spiral balance mechanisms - both engineered for heritage accuracy and modern performance.

Part LPart FPAS 24Factory Finished
Traditional timber sash windows on a Georgian property

02 - Casement Windows

Single, Full, Top & Bottom Opening


Versatile timber casement windows suited to cottages, Arts & Crafts homes, and contemporary extensions. Four opening configurations to match any architectural requirement - all with period-correct profiles and modern compliance.

Part LPart FPAS 24Made to Measure
Timber casement windows on a period cottage

03 - Window Types

Six main types, one uncompromising standard


Each type engineered for a specific purpose — from heritage restoration to contemporary extension. All built to the same exacting standard.

Sash - Type 01

Box Sash

The original weighted sash mechanism - concealed lead or steel weights within the box frame provide perfectly balanced, effortless operation.

Weighted PulleysHeritage ProfileDouble Glazed

Sash - Type 02

Spiral Balance

A slimmer, lighter alternative to the box sash. Spring-tensioned spiral balances allow narrower frame profiles whilst retaining the classic sliding sash movement.

Slimline FrameSpring TensionTilt for Cleaning

Casement - Type 03

Single Opening

One sash hinged to open outward, paired with a fixed pane. The most common configuration for cottages and period properties.

Side HungFriction StayEspagnolette Lock

Casement - Type 04

Full Opening

Both sashes open outward for maximum ventilation and unobstructed views. Ideal for larger openings and garden-facing elevations.

Dual OpeningMax VentilationPeriod Ironmongery

Casement - Type 05

Top Opening

Hinged at the top and opening outward, providing controlled ventilation whilst maintaining security. Often specified for bathrooms and utility rooms.

Top HungSecure VentilationEasy Clean

Casement - Type 06

Bottom Opening

Hinged at the bottom and opening inward. Provides gentle background ventilation, suited to bedrooms and high-level positions.

Bottom HungInward OpeningNight Ventilation

Bespoke Solutions

Not limited to six


Every property is different. If your project calls for a non-standard configuration, unusual dimensions, or a style not listed here — we make that too. Talk to our team about a bespoke timber window built to your exact specification.

Discuss Your Project

04 - Built-In Benefits

Every window, every standard


Compliance, performance, and finish are not optional extras — they are built into every window we make.

01
Heritage Correctness

Conservation - Listed Building - Period Profiles

Period-accurate profiles, mouldings, and glazing bar proportions that satisfy conservation officers and complement your property's architectural character.

02
Energy Performance

Part L - Double Glazed - Warm Edge Spacers

Part L compliant as standard. High-performance double glazing, warm-edge spacers, and precision-engineered draught seals deliver modern thermal efficiency in a traditional frame.

03
Acoustic Calm

Noise Reduction - Sealed Units - Dense Timber

Timber's natural density combined with our sealed glazing units significantly reduces external noise - a particular benefit for properties on busy streets or under flight paths.

04
Weather Sealing

Factory Finished - Microporous Paint - Draught Sealed

Factory-applied microporous paint systems and precision-machined draught seals protect against the British climate. No site finishing, no gaps, no compromise.

05
Ventilation

Part F - Trickle Vents - Discreet Integration

Part F compliant trickle ventilation integrated discreetly into the frame. Background airflow without draughts - meeting building regulations without compromising aesthetics.

06
Security

PAS 24 - Multi-Point Locks - Laminated Glass

Part Q and PAS 24 certified. Multi-point locking, reinforced meeting rails, and laminated glass options deliver genuine security - not just a sticker on the glass.

05 - Our Installations


A selection of recent projects across conservation areas, listed buildings, and period homes — each one made to measure.

Common Questions

Timber Sash Windows — FAQ


Start Your Window Project

Let's talk about your windows


A no-obligation conversation about your property - typically 10 to 15 minutes. We'll discuss your requirements, answer your questions, and give you an initial sense of what's possible.