Bespoke Sash Windows | Dalton Joinery

Name: Sash Windows
Brand: Dalton Joinery

Traditional timber sliding sash windows — built in our workshop with the proper proportions, glazing bar profile and run-through horns that distinguish a genuine sash from a cheap retrofit. Available with weights and cords, or with concealed spiral balances for restorations where you need slim sashes and an authentic look.

Single-glazed for the most sensitive listed-property settings, slim double-glazed (12–14mm units) for conservation-area approvals where you need better thermal performance, or fully double-glazed for new-builds and projects without heritage constraints.

Benefits

Why choose Sash Windows

Authentic Victorian, Edwardian or Georgian proportions
Weights-and-cords or spiral balance mechanisms
Run-through or stuck-on horns to match the era
Single, slim-DG or standard double glazing
Approved across many Kent conservation areas
Concealed draft seals — much less rattle than the originals
Hand-finished paint or stain in any heritage colour

Features

Engineered for performance

Mortice-and-tenon sash construction
Brass sash lifts, locks and pulleys
Authentic ovolo or lambs-tongue glazing bars
Concealed weather seals (a modern, invisible upgrade)
Both sashes operable on traditional double-hung designs
Optional tilt-cleaning mechanism on contemporary installs

Make it yours

Configurator

Mix and match colours, hardware and glass to suit your home.

Colours

Available finishes

White Off-white / Cream Heritage Grey Graphite French Navy Sage Green Chartwell Green Bespoke RAL match Hand-applied wax Danish oil Hard-wax oil Satin lacquer Matt lacquer

Frame styles

Choose your style

Traditional double-hung sash
Single-hung sash (upper fixed)
Triple-light Victorian
Bay sliding sash configuration
Mock-sash (fixed)

Glass

Glass options

Single glazed — heritage matched to existing
Slim double glazed units (12–14mm) for conservation areas
Standard 24mm argon-filled double glazing
Triple glazing for extreme exposure or noise
Acoustic laminated for road-facing rooms
Toughened safety glass (BS EN 12150)
Obscure / privacy patterns
Stained, leaded and Georgian bar details

Hardware

Furniture & hardware

Solid brass, chrome, satin or bronze ironmongery
Espagnolette and shootbolt locking
Heritage monkey-tail and pear-drop handles
Period-correct fanlight catches and stays
Sash pulleys, lifts and sash locks (for sash windows)
Multi-point security locking on opening lights
Trickle vents where Building Regulations require

Customisation

Tailored to your home

We match existing sash proportions exactly — meeting rail thickness, horn detail, glazing bar profile and the slight taper that distinguishes a Georgian sash from a Victorian one. If you're replacing something that's already been incorrectly replaced, we'll go back to the period-correct detail.

Ideal for

Property suitability

Victorian and Edwardian terraces, period townhouses, Georgian rectories and listed properties across Sevenoaks, Tunbridge Wells and London. Increasingly popular on new-builds designed in a traditional style.

Installation

How we fit it

Sash replacement is detailed work — every install is led by an experienced joiner. We protect interiors, remove the old sashes and frame, fit the new unit, dress the reveals and silicone-seal the exterior. Most single-sash replacements complete in a day; whole-house in a week.

Common questions

Frequently asked

Do you work with listed buildings and conservation areas? +

Frequently — a significant portion of our work is for period and listed properties. We can produce drawings, sample sections and historical-detail matches to support conservation officer applications, and we're familiar with the listed-building process across Kent and the London boroughs.

Can I have double glazing in my listed-building sash windows? +

Often, yes — with the slim 12–14mm units that fit into traditional sash sections. Approval depends on the listing grade and the conservation officer's view, but we have a high success rate getting these approved across Kent.

How long does it take from first call to installation? +

A typical project takes 6–12 weeks from initial site visit to install. Survey and design happen in week 1; manufacture in our workshop takes the bulk of the time; installation is usually a few days on site. Larger projects or specialist timber may take longer — we'll be honest about timings at the quote stage.

Do you do free quotes? +

Yes. We'll come out, talk through your project, take measurements and provide a written itemised quote. There's no obligation, no high-pressure follow-up and no fee.

Do you install everything yourselves? +

Yes. Everything we make is fitted by our own team. For kitchens and bedrooms we also coordinate any plumbing, electrical or building work on your behalf so you have a single point of contact.

Where are you based and how far do you travel? +

Our workshop is at Seal Croft Farm in Seal, just outside Sevenoaks. We cover Sevenoaks, Tunbridge Wells, Tonbridge, Maidstone, Bromley, Orpington and much of central and south London. For larger projects we travel further into Kent and Surrey.

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