Timber sash window repair and replacement in Blandford Forum
Made‑to‑measure timber sash window repair and replacement Blandford Forum. Conservation‑grade Georgian joinery supplied and delivered from our London studio.
Barnsbury Joinery is a specialist maker of conservation‑grade timber windows, working with owners of period homes across the Blandford Forum Conservation Area and the wider Dorset market town. Blandford Forum is one of the most complete Georgian townscapes in England, rebuilt after the Great Fire of 1731 largely to the designs of the Bastard brothers, and its sash‑heavy streets deserve joinery that respects their original mouldings, glazing bars and putty lines. We supply made‑to‑measure sashes, box frames and casements matched to your existing windows, so that repairs and replacements sit correctly within Blandford's protected townscape rather than flattening the details that make it distinctive.
How we work with clients in Blandford Forum
It is worth being clear from the outset about how our service applies here. Our full on‑site service, covering survey, restoration, repair and fitted installation carried out by our own people, runs across London and the South East, close to our studio in north London. Blandford Forum sits well outside that on‑site radius, so the service we offer in Dorset is primarily made‑to‑measure supply. We manufacture your sashes, box frames or complete windows to precise measurements and specification, finish them to your requirements, and deliver them to Blandford Forum ready for your own builder, joiner or window contractor to install.
This supply‑and‑deliver model suits Blandford well. Many owners of Georgian and Victorian property in the town already have a trusted local builder or joiner who knows the house, and what they lack is a maker who can produce genuinely conservation‑grade windows to the correct period profiles. That is the gap we fill. You or your contractor take the measurements, or we guide you through measuring accurately, and we produce components that arrive true, square and ready to hang. Because the joinery is made to your figures rather than fitted by us, the responsibility for installation, weatherproofing and final adjustment rests with your installer on site.
We would rather set this out plainly than imply a local fitting team we do not have in Dorset. What you gain in return is access to the same specialist making, the same timber selection and the same eye for historic detail that we bring to listed and conservation‑area work in London, delivered to your door in Blandford Forum.
Why Blandford Forum's Georgian townscape needs the right windows
Few English towns are as coherently Georgian as Blandford Forum. After the fire of 1731 destroyed most of the medieval town, it was rebuilt over the following decades in brick and stone, giving the centre a remarkable unity of scale, proportion and detail. The result is a townscape defined by sash windows: tall, vertically proportioned openings with fine glazing bars, subtle sash horns on the later examples, and putty‑fronted glazing that catches the light in a particular way. Victorian additions and later infill continued the sash tradition, so the vocabulary of vertically sliding timber windows runs through almost the whole of the historic core.
This matters because a poorly judged replacement window is instantly visible in a place like Blandford. Chunky modern sections, flush glazing, the wrong horn detail or a plastic frame all read as wrong against the Georgian rhythm of the street. When we make windows for Blandford Forum, we match the period mouldings, the meeting‑rail profiles and the putty lines to the originals, so that a replacement reads as part of the house rather than an intrusion. Where original windows survive and are sound, the right answer is often repair rather than replacement, and we can supply the components to make that possible.
Because so much of the town falls within the Blandford Forum Conservation Area, and because a number of buildings are individually listed, the appearance of windows is not simply a matter of taste. It is often a matter of planning. Getting the joinery right is therefore both an aesthetic and a regulatory question, and the two are closely linked.
Repair, overhaul and made‑to‑measure replacement
For sound original windows, repair and overhaul are almost always preferable to replacement, both for conservation reasons and for the longevity of well‑seasoned historic timber. We can supply the parts and joinery that a competent local joiner needs to carry out spliced repairs, resin or timber dutchman repairs to decayed sections, new cills, and replacement sash components. Where sash cords, weights and pulleys have failed, the cords‑and‑weights mechanism can usually be overhauled and rebalanced so the windows run smoothly again.
Where windows are beyond economic repair, or have already been lost to unsympathetic replacement, we make like‑for‑like replacement sashes and box‑frame windows to measure. These are produced to match the sightlines, glazing‑bar widths and detailing of the originals, so the new work is faithful to the period. Options include traditional single glazing with putty‑fronted beading for the most sensitive locations, and slim‑profile double glazing where it can be accommodated without compromising the profiles, subject to what is acceptable on your particular building.
Timber choice is central to how a window performs and lasts. We work in Accoya, a modified softwood with excellent stability and durability, in engineered redwood, and in hardwoods on request. Finishing can be by factory spray application for a durable, even coat, or left for site finishing so your decorator can match the existing colour and sheen once the windows are installed. In every case the aim is joinery that arrives ready to install and behaves predictably for decades.
Conservation area consent and listed building considerations
Because Blandford Forum's historic core is a conservation area and includes many listed buildings, changes to windows frequently require permission. As a general rule, any alteration that affects the external appearance of a window in a conservation area can require consent, and listed buildings need listed building consent for changes to windows in almost all cases, even where the change is intended as like‑for‑like. It is always worth checking with Dorset Council's conservation and planning team before committing to work, rather than after.
Where consent is needed, the specification of the replacement windows usually has to demonstrate that profiles, sightlines and materials match the historic originals closely. This is precisely the kind of detail our made‑to‑measure joinery is designed to satisfy. We can prepare the joinery specifications, sections and drawings that support a conservation‑area or listed building consent application, so that you or your architect can present a clear, well‑documented case to the local authority. Getting this right at the outset avoids delay, refusal, or the far worse outcome of having to remove and remake windows after the event.
We should be honest that the on‑the‑ground survey and installation elements of a consent‑led project in Blandford would sit with your own local team, since our fitted service does not extend to Dorset. What we provide is the specialist making and the documentation to underpin it, which is often the hardest part to source locally.
Delivery to Blandford Forum and the wider area
We deliver finished windows and components to Blandford Forum and throughout the surrounding Dorset area, including nearby towns and villages within reach of the town. Windows are made in batches to your schedule, protected for transport, and delivered ready for installation by your chosen contractor. If you are coordinating the project yourself, we can advise on sequencing, on how to measure accurately for made‑to‑measure work, and on what your installer should check on arrival.
Whether you own a Georgian townhouse in the centre of Blandford, a Victorian villa on the edge of town, or a period cottage in the surrounding countryside, the priority is the same: windows that honour the original architecture while performing well against draughts, rattle and heat loss. Working to a supply‑and‑deliver model keeps the specialist joinery in expert hands while leaving installation with the local team who know your building best.
If you would like to discuss a project in Blandford Forum, we are happy to talk through your windows, the likely conservation requirements, and how our made‑to‑measure supply can fit around your builder or joiner. You can reach us on 020 7164 6305 or at info@barnsburyjoinery.com.
Common questions
Do I need permission to change my windows in the Blandford Forum Conservation Area?
Often yes, especially for like‑for‑like replacement or any change to appearance, and listed buildings will almost always need listed building consent. We recommend checking with Dorset Council's conservation team early, and we can prepare joinery specifications and drawings to support your application.
Do you install windows in Blandford Forum?
Our fitted service, covering survey, restoration and installation by our own team, runs in London and the South East. In Blandford Forum we work on a made‑to‑measure supply basis: we manufacture and deliver your windows ready for your own builder, joiner or contractor to install.
Can I have double glazing?
Slim‑profile double glazing is sometimes acceptable on non‑listed buildings where the profiles and sightlines can be preserved. Where it is not appropriate, single glazing with putty‑fronted beading or secondary glazing is usually the better route for sensitive Georgian windows.
What timbers and finishes do you use?
Accoya, engineered redwood, or hardwoods on request. Windows can be factory spray finished for durability, or supplied ready for site finishing so your decorator can match the existing colour once installed.
How do I measure for made‑to‑measure windows?
You or your contractor take the measurements, and we can guide you on measuring accurately for made‑to‑measure sashes and box frames. Because the joinery is produced to your figures, we advise having your installer confirm measurements before manufacture begins.
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Request a surveyA studio of The Barnsbury Group
Barnsbury Joinery is the flagship studio of The Barnsbury Group, a second‑generation heritage joinery house. Established in London in 1987, it makes bespoke joinery by hand and carries the parent voice for the family of studios.
