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Business Details
23 Years
experience
Expert Sash Window Restoration & Joinery Services in Kent
Established two decades ago, Box Sash Windows has built a reputation for excellence in timber joinery, sash window restoration, and draught-proofing across the southeast of England. Our team of certified craftsmen, affiliated with The Guild of Master Craftsmen and Fensa, combines traditional techniques with modern materials to preserve the heritage of period properties while enhancing energy efficiency. We operate from our dedicated workshop in Herne Bay, Kent, where we manufacture bespoke windows and doors using premium hardwoods and BC Pine, ensuring every project meets exacting standards. Our commitment to quality is underscored by QA insurance backing and a 100% customer satisfaction guarantee. Specialising in full window restoration, double-glazed units, and draught-proofing systems, we serve both residential and commercial clients, offering free site surveys and competitive pricing.

With a focus on sustainability, we often repurpose existing frames to reduce waste and costs. Our expertise extends to Grade 2 listed properties, demonstrating our capability to handle historically significant projects. By maintaining transparency in pricing and avoiding hidden fees, we have cultivated long-term trust with clients across Kent, Sussex, and South London. Our 30% lower pricing compared to industry averages ensures accessibility without compromising on craftsmanship. As a family-run business, we prioritise direct communication, with owner Louis Brett personally overseeing all installations and repairs.
Services
Draught Proofing Double Glazed Windows Window Restoration Timber Repairs Joinery Services Sash Window Repair Window Furniture Supply Resin Repairs Sash Cording Glazing Services
Details
  • Year established: 2003
Highlights and features
  • We have over 20 years of experience in sash window restoration and joinery.
  • Our team are members of The Guild of Master Craftsmen and Fensa registered.
  • We offer free site surveys and detailed quotations with no obligation.
  • Our prices are at least 30% lower than most competitors.
  • We use high-quality materials like Hardwood and BC Pine for durable results.
Associations and certifications
  • Fensa
  • The Guild of Master Craftsmen
  • QA insurance back guarantee
Services
Draught Proofing
Our draught-proofing system involves dismantling windows, cleaning pulleys, installing brush strips, and re-cording sashes to eliminate rattles and heat loss. This process improves energy efficiency by reducing heat escape through gaps, ensuring quieter, more comfortable interiors. Ideal for period properties, it maintains original aesthetics while cutting energy bills.
Sash Window Restoration
We restore sash windows to their original condition by repairing timber frames, replacing sashes, and installing double-glazed units within existing frames. This service preserves historical integrity while enhancing thermal performance. Full restoration includes realigning components and applying durable finishes, ensuring smooth operation and longevity for Grade 2 listed and other heritage buildings.
Timber Repairs
Specialised timber repairs address rot, warping, and decay using high-grade materials like Dry Flex Resin and Timbercare products. We match existing wood types, including hardwood and BC Pine, to maintain structural integrity. Repairs extend the lifespan of windows and doors, avoiding full replacements while preserving traditional designs in period homes.
Joinery Services
Our joinery workshop crafts custom sash and casement windows, doors, and architectural elements tailored to specific periods or architectural styles. Using traditional methods, we replicate Victorian, Georgian, and other designs, ensuring symmetry and compliance with planning regulations. Services include on-site consultations and installations for residential and commercial properties.
Window Furniture Supply
We supply and fit high-quality window furniture, including brass, chrome, and antique finishes, to complement restored windows. Options include locks, pulleys, and decorative handles, enhancing both functionality and aesthetics. Custom orders are available to match unique design requirements, ensuring a cohesive look for heritage and modern properties alike.
People
Louis Brett
Owner
Louis Brett is the owner and lead expert at Box Sash Windows, bringing over 20 years of experience in sash window restoration and joinery. He personally oversees all projects, ensuring high-quality craftsmanship and customer satisfaction across Kent and the southeast.
Questions
What areas do you cover?
We serve Kent, Sussex, South London, and the wider southeast of England, including Camden, Croydon, and Bromley. Contact us for assistance outside these areas.
Are your prices competitive?
Yes, our quotes are at least 30% lower than most competitors while maintaining premium quality materials and craftsmanship.
Do you work on listed buildings?
Yes, we specialise in Grade 2 listed properties, using traditional methods to preserve historical integrity during window and door restoration.
What accreditations do you hold?
We are Fensa registered, members of The Guild of Master Craftsmen, and backed by QA insurance for quality assurance.
Can you restore old sash windows?
Yes, we fully restore sash windows by repairing timber, replacing sashes, and installing draught-proofing systems to improve efficiency without compromising aesthetics.
Do you offer free consultations?
Yes, we provide free site surveys and no-obligation quotations, conducted personally by owner Louis Brett for all projects.
Reviews (5)
Pamela Jordan
Nov 16, 2021 Report
We had some new hardwood double glazed sash windows made and fitted by Louis to replace our old draughty rotting sashes. Louis was very professional from initial quote to the day of fitting. Louis and Adam were prompt on the day and not only did an amazing job fitting the new sashes but also cleaned up really well. The windows are an absolute joy! No more windows dripping in condensation and much quieter and warmer. Just need to save up to get the rest of the house done! Highly recommended.
Sylvia Mait
Apr 14, 2021 Report
FANTASTIC JOB Victorian House Bay windows up stairs and down plus side window to front of house completed in one day. Professional polite and very clean used dust sheets everywhere and cleaned up leaving no mess at all. I WOULD RECOMEND TO ANYONE WITHOUT DOUBT.
Michael Bassett
Mar 01, 2021 Report
About two years ago, Meridian Sash replaced our old single pane windows with double glazed sash versions (filled with argon gas and with draft proofing). The new units were created to fit the old frames, and to reflect the original design of the house. They look fantastic, and perform extremely well. We've had only positive feedback from visitors and neighbours alike. And, the house now performs much better in terms of energy costs for heating. Our experience of Louis and his team of installers was great, and we really appreciated having them in to do the work. We recommend them to anyone looking
Sara Pennington
Jan 19, 2021 Report
Highly recommend Meridian Box Sash Windows. Superb craftsmanship and professional service. Also a competitive price.
Ann White
Aug 04, 2020 Report
We will not hesitate to use this company again. A super-fast response, a detailed quote, then skilled work completed to highest standard. Friendly and personable businessman.