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SashWise vans

About SashWise

SashWise are a trusted name in timber sash and casement window replacement and repair across West London. Based in Twickenham, we are a family-owned and operated business that has proudly served the local community since 2006. With nearly two decades of experience and a reputation for excellence, we take immense pride in preserving the charm and character of period properties through our expert craftsmanship.

Who we are

At SashWise, we are more than just a business – we are a team of passionate artisans and craftsmen dedicated to preserving a vital part of Britain’s architectural heritage: timber sash windows. Founded by Dan Johnston, who leads a dedicated team of highly skilled window fitters, our company operates with a strong ethos of quality, transparency, and customer satisfaction.

Our team collectively brings over 25 years of experience to every project. Whether working on a stately Georgian home, a quintessential Victorian terrace, or an elegant Edwardian villa, we approach every job with the same meticulous attention to detail that has earned us our stellar reputation.

Being a family-run business, we understand the importance of personal touch and community values. Our customers are not just clients; they are neighbours, friends, and fellow custodians of West London’s rich architectural landscape.

Man in van

What we do

SashWise is your one-stop destination for all things related to timber sash and casement windows. From basic repairs to full replacement, we specialise in returning your windows to their original beauty while enhancing their functionality and energy efficiency. Here’s a closer look at our services:

  • Double Glazing Upgrades:
    We offer a range of double-glazing solutions to improve insulation without compromising the historical look of your property including the innovative new Fineo vacuum glazing.
  • Replacements:
    For windows that are beyond repair, we offer custom-made timber window replacements that replicate the design and craftsmanship of your originals. Our replacements are built to match period-specific styles while incorporating modern improvements like energy-efficient glazing.
  • Draught Proofing:
    Our draught-proofing service improves comfort, energy efficiency and reduces noise pollution. By fitting discreet seals, we eliminate cold draughts while preserving the beauty of your windows.
  • Restoration:
    Our restoration service breathes new life into aging timber windows. We carefully strip away layers of wear and damage, restoring the frames and components to their original condition while retaining their historical integrity.
  • Repairs:
    From tackling rot to fixing broken cords and pulleys, our team offers a comprehensive repair service to ensure your timber windows are secure, functional, and visually appealing.
  • Door installation:
    We also supply and fit a wide range of doors to complement our sash and casement windows, including French doors and front and back doors.

Every project we undertake is guided by our unwavering commitment to quality. We use only the finest materials, including sustainably sourced Accoya timber, high quality heritage iron mongery and only the most durable quality paints. This ensures not only the longevity of your windows but also a seamless blend with your home’s original architecture.

Window repairs in London
hardwood double glazing
Fitting new window locks

Why we do it

At SashWise, we believe that timber sash windows are more than just a practical feature; they are a hallmark of Britain’s architectural heritage. Preserving them means preserving a piece of history, a connection to craftsmanship from a bygone era.

It’s this belief that drives our work. We take immense pride in restoring and enhancing these iconic features, returning them to their full glory while respecting the character of the buildings they adorn. For us, every successful project is not just a job well done – it’s a meaningful contribution to maintaining the historical charm of West London and beyond.

But there’s more to it than just preserving history. Beautifully maintained windows can also add significant value to your property. They enhance curb appeal, improve energy efficiency, and reduce noise pollution and ensure your home retains its period charm – something we are honoured to be a part of.

Sash window in Hampton

Where we work

SashWise is proud to serve the vibrant and architecturally rich communities of West London, Middlesex, Surrey, and the surrounding areas.

  • Teddington
  • Richmond
  • Twickenham
  • Kingston
  • Surbiton
  • Hampton
  • Barnes
  • Putney
  • Chiswick
  • Ealing
  • Wandsworth
  • Clapham
  • Hammersmith
  • Wimbledon
  • Kew

 

With a dedicated joinery workshop in Twickenham, this allows us to efficiently manage projects throughout West London. Whether you’re based in the heart of Richmond or the leafy streets of Chiswick, you can count on us for prompt, reliable service.

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Our Commitment to Excellence

At SashWise, our reputation is built on a foundation of craftsmanship, attention to detail, and an unwavering commitment to customer satisfaction. Every window we repair, restore, or replace is treated as if it were in our own home. We understand that every property is unique, and we tailor our services to meet your specific needs and preferences.

Here’s what you can expect when you work with us:

  • Personalised Service:
    As a family-run business, we value the personal connections we build with our clients. From your first consultation to the final inspection, we keep you informed and involved every step of the way.
  • Expert Craftsmanship:
    Our team is made up of highly skilled professionals who share a passion for sash windows. Our combined expertise ensures flawless results every time.
  • Transparency:
    We believe in clear communication and honest pricing. When you choose SashWise, you can rest assured there are no hidden costs or surprises – just quality work delivered on time and within budget.
  • Sustainability and Energy Efficiency:
    We are committed to using sustainable materials and eco-friendly practices wherever possible. From sourcing timber responsibly to improving energy efficiency, we aim to minimise our environmental impact.
Decorative sash window
Richmond upon Thames sash window repair and installation

Why Choose SashWise?

There are many reasons to trust SashWise with your sash window needs, but here are just a few:

  • Over 25 years of combined experience in timber sash and casement window replacement, restoration and repair
  • A proven track record of satisfied clients across West London
  • Use of the highest quality materials and traditional craftsmanship techniques
  • Family-owned and run, with a deep commitment to the local community
  • Comprehensive services tailored to Victorian, Edwardian, and Georgian properties
  • Competitive pricing and exceptional value for money

When you choose SashWise, you’re choosing a company that genuinely cares about your home, your satisfaction, and the legacy of West London’s architectural heritage.

Contact Us

We’re always happy to discuss your timber window and door needs. Whether you’re looking for advice, a detailed quote, or simply want more information about our services, our friendly team is here to help.

Address:

SashWise Limited
Railway Arch No 39, Popes Grove
Twickenham
TW1 4JW

Tel:  0208 977 4627