Double Glazed Timber Sash Windows in BATh, Bristol and Somerset

Artisawn designs and manufactures new timber box frame sash windows for period and character properties across Somerset, Bath, Bristol and Wells. Whether you need complete new box frame assemblies, replacement sashes for existing frames, or double glazed upgrades to replace unsuitable uPVC, every window is made by hand in our Somerset workshop to suit your property.

We work directly with homeowners, architects and conservation officers — supplying and installing bespoke sash windows that match original proportions, moulding profiles and glazing bar arrangements. No factory components, no off-the-shelf systems. Every window is made individually for the building it belongs to.

 

 

Replacement Sashes for Existing Box Frames

Where original box frames remain structurally sound, replacing only the sashes is often the most cost-effective and sympathetic solution. We manufacture new double glazed timber sashes designed specifically to fit your existing boxes, maintaining the original weight and balance of the window.

This approach is particularly well suited to conservation areas and listed buildings across Somerset, Bath and Bristol, where retaining original fabric is a planning requirement. New sashes are:

• Made to match existing sash dimensions and sight lines
• Fitted with double glazed units (approx. 14-16mm overall)
• Balanced using traditional lead sash weights where possible
• Fully draught sealed with brush pile 
• Carefully fitted to eliminate rattles and binding

Retaining existing box frames also significantly reduces installation time and disruption compared to full window replacement.

 

Complete New Box Frame Sash Windows

When original box frames are beyond repair — due to wet rot, structural movement or previous poor-quality replacements — we manufacture complete new sash window assemblies from scratch. This includes:

• New box frames, pulley stiles, linings and back linings
• Weighted or spring-balanced sash operation
• Slimline double glazed units or traditional single glazing
• Matching moulding profiles, ovolo or lamb's tongue glazing bars
• Full draught sealing and brush pile weatherstripping
• Factory or site primed finish, ready for painting

Each window is made to match the proportions and character of your property. We regularly work on Georgian and Victorian properties across Somerset and Bath where accuracy of detail is essential — both aesthetically and, where applicable, for listed building consent.

 

 

Handmade Timber Joinery

All sash windows are manufactured in our Somerset workshop using traditional joinery methods combined with modern materials and glazing technology. We do not use factory-made components or off-the-shelf systems — each window is individually made for the property it belongs to.

This approach allows greater attention to detail, accurate proportions and a level of finish that reflects traditional craftsmanship. By controlling both manufacture and installation, we ensure consistency and quality from the workshop through to completion in your home.

 

 

Careful Installation in Period Homes

Installation is carried out with the same care taken during manufacture. Whether installing new double glazed sashes into existing box frames or fitting complete new windows, work is completed with minimal disruption to your home.

We regularly work within period properties across Bath, Bristol and Somerset and understand the importance of protecting original features and finishes. From initial survey through to final adjustments, every stage is handled by experienced joiners to ensure your windows operate smoothly and perform as intended for years to come.

 

VIEW INSTALLATION VIDEO

 

 

Double Glazing Options

All new sash windows can be supplied with a choice of glazing:

Slimline double glazed units — typically 4-6-4mm, suited to conservation areas and listed buildings

Standard double glazed units — improved thermal performance for non-listed properties

Acoustic laminated glass — for properties on busy roads in Bath, Bristol or Taunton

Satin or obscure glass — for bathrooms and side elevations

Toughened safety glass — where required by Building Regulations

 

Slimline units in particular allow double glazing to be incorporated without significantly altering the sight lines or shadow depths of the original window — an important consideration for listed buildings and conservation areas.

Listed Buildings and Conservation Areas

We have extensive experience working on listed buildings and within conservation areas across Somerset, including properties in Wells, Frome, Glastonbury, Shepton Mallet, Bruton, Bath and the surrounding villages. New windows for listed properties require listed building consent, and we can assist with specification drawings and technical information to support your application.

Our approach to listed building work prioritises:

Matching original moulding profiles and glazing bar arrangements

Slimline double glazing where permitted, single glazing where required

Traditional sash weights and cords rather than spring balances where practical

Softwood or hardwood to match the original timber species

Minimal intervention to surrounding masonry and reveals

 

Areas We Cover

We manufacture and install new box frame sash windows across:

Somerset — including Taunton, Bridgwater, Yeovil, Frome, Glastonbury, Wells, Shepton Mallet, Bruton, Castle Cary, Crewkerne and surrounding villages

Bath and the surrounding areas — including Radstock, Midsomer Norton, Keynsham and the Cotswold fringe

Bristol — including Clifton, Redland, Cotham, Bishopston and the wider city

Wells and the Mendips

 

Our workshop is based at Pylle, near Shepton Mallet, giving us easy access across the region. We are a small, specialist business — all survey, manufacture and installation work is carried out by our own team.

Frequently Asked Questions

How much do new box frame sash windows cost?

Every window is priced individually based on size, glazing specification and the complexity of the moulding profiles required. As a guide, new double glazed timber sash windows typically start from around £2,000 per window. We provide detailed written quotations following a free site survey. Contact us to discuss your project.

Do I need planning permission for new sash windows?

For most non-listed properties, replacing like-for-like sash windows does not require planning permission. For listed buildings, listed building consent is required for any replacement windows regardless of whether the design matches the original. For properties in conservation areas, permitted development rights may be restricted — we can advise on this during your survey.

Can you match original moulding profiles on my period property?

Yes. We have a wide range of tooling and can reproduce most common Victorian and Georgian moulding profiles — including ovolo, lambs tongue and step ovolo glazing bars, as well as period staff bead, parting bead and architrave profiles. Where original sections are unusual we can arrange bespoke tooling or adapt existing profiles to achieve the correct appearance.

How long does it take to manufacture new sash windows?

Lead times vary depending on current workshop capacity and the number of windows required. As a guide, most projects run to a 4–8 week lead time from survey to installation. We will confirm an accurate lead time when we provide your quotation.

Can you work with architects and heritage consultants?

Yes. We regularly work alongside architects, conservation officers and heritage consultants on both residential and commercial projects. We can provide specification drawings, technical data sheets and window schedule information to support planning and listed building consent applications.

Do you install throughout Somerset and Bath?

Yes. We cover the whole of Somerset, Bath, Bristol and the surrounding areas from our workshop in Pylle. There is no additional charge for travel within our standard service area.