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Business Details
16 Years
experience
Expert Sash Window Repair & Restoration Services
Sash Window Preservation is a specialist in restoring and repairing sash windows, combining traditional craftsmanship with modern techniques. Established in 2010, we serve residential and commercial clients across Greater London, the Eastern Counties, and Suffolk. Our team is CERTASS qualified and CHAS accredited, ensuring high standards of workmanship and compliance. We prioritise sustainability by reusing materials, utilising FSC-certified timber, and operating electric vehicles to reduce our carbon footprint. Our services include double glazing, draught proofing, and bespoke joinery, tailored to preserve the architectural heritage of properties while enhancing energy efficiency.

With a dedicated joinery yard in Norwich, we manufacture custom windows and doors locally, minimising transportation emissions. Our commitment to customer satisfaction is reflected in our transparent processes, free quotations, and a 93% recycling rate for waste materials. We work closely with clients to deliver solutions that balance historical preservation with contemporary needs, ensuring long-lasting results that meet both aesthetic and functional requirements.
Services
Sash Window Repair Double Glazing Draught Proofing Secondary Glazing Vacuum Glazing Window Replacement Joinery Services Listed Building Solutions Sash Window Security Finishing Touches
Details
  • Year established: 2010
Highlights and features
  • CERTASS qualified and CHAS accredited for quality assurance
  • Locally manufactured windows using sustainable Accoya timber
  • 93% recycling and reuse rate for waste materials
  • Free onsite or video quotations for transparent pricing
  • Dedicated joinery yard in Norwich for bespoke solutions
Associations and certifications
  • CERTASS
  • CHAS
What people say
Excellent reputation Exceptional team Sustainable practices Transparent pricing Bespoke solutions
Services
Sash Window Repair
Our sash window repair service addresses rot, draughts, and structural issues using traditional carpentry techniques. We prioritise preserving original features while enhancing functionality and energy efficiency. Each project includes a detailed assessment and tailored solutions for long-term durability.
Double Glazing
We install slimline double glazing units within existing sash frames, maintaining historical aesthetics while improving thermal performance. This solution reduces heat loss and noise without altering the window's original appearance, ideal for heritage properties.
Draught Proofing
Our draught proofing system uses brush seals to eliminate air infiltration by up to 86%. This enhances thermal efficiency, reduces noise, and preserves window functionality while maintaining conservation approval for listed buildings.
Secondary Glazing
Secondary glazing adds an internal insulating layer to existing windows, improving thermal and acoustic performance. It's a discreet, cost-effective alternative to full replacement, suitable for properties where external modifications are restricted.
Vacuum Glazing
Vacuum glazing uses two panes with a vacuum-sealed gap to provide superior thermal efficiency in an ultra-thin profile. This solution offers exceptional insulation without compromising the slim aesthetics of traditional sash windows.
Questions
What services does Sash Window Preservationtion offer?
We specialise in sash window repair, double glazing, draught proofing, secondary glazing, and bespoke joinery for residential and commercial properties.
Are you certified for heritage building work?
Yes, we are CHAS accredited and CERTASS qualified, with expertise in Listed Building and conservation area projects.
How do you ensure sustainability?
We reuse 93% of materials, use FSC-certified Accoya timber, operate electric vehicles, and recycle old sashes to minimise environmental impact.
Do you offer financing options?
Yes, we provide financing through Kandoo for eligible customers to support accessibility of our services.
What areas do you cover?
We serve Greater London, East Anglia, and the Eastern Counties, including Norwich, Suffolk, and Cambridgeshire.