Business Details
19 Years
experience
Expert Sash Window Restoration Services
Established over 15 years ago, Sash Window Heritage has become London and the South East's leading sash window specialist. Our team combines traditional craftsmanship with modern technology to restore period sash windows while improving thermal efficiency. We specialise in retrofitting 10-12mm double glazed units into original timber frames, preserving architectural integrity while reducing heat loss by up to 75%. With decades of collective experience in conservation and restoration, our expert carpenters and fitters handle complete window overhauls, frame repairs and draughtproofing. We use premium materials including Window Care resin system for rot repairs and offer full painting services to ensure seamless finishes.Our approach prioritises preserving original building fabric where possible, only recommending replacement when absolutely necessary. Serving both domestic and commercial clients, we undertake projects ranging from single window repairs to full property transformations. Every installation includes draught sealing to eliminate rattling and improve noise reduction. Our commitment to quality has earned us trusted status among homeowners and conservation officers alike. We provide comprehensive services including FREE site surveys, bespoke joinery and aftercare support.
Services
Sash Window Restoration
Double Glazed Units
Draughtproofing
Frame Repairs
Bespoke Joinery
Details
- Year established: 2007
Highlights and features
- We are London and the South East's leading sash window specialists with over 15 years' experience
- We use 12mm double glazed units that maintain original window appearance while improving efficiency
- Our team includes fully qualified users of the Window Care resin system for rot repairs
- We prioritise preserving original building fabric rather than recommending unnecessary replacements
- Every installation includes comprehensive draughtproofing to eliminate rattling and improve noise reduction
What people say
Look and slide as good as new
Excellent painting service
Retained original window character
Successful complex restoration projects
Professional team with expertise
Services
Sash Window Restoration
We restore original sash windows using traditional craftsmanship combined with modern techniques. Our process retains period features while upgrading functionality through draughtproofing and double glazing integration. Each restoration preserves architectural integrity while improving thermal efficiency and noise reduction, transforming draughty historic windows into high-performance units that maintain original character.
Double Glazed Units
We install ultra-thin 10-12mm double glazed units designed specifically for sash windows. These units use inert gases and low-e glass to maximise insulation while maintaining traditional window profiles. The installation significantly reduces heat loss by up to 75% compared to single glazing, improving energy efficiency without compromising period aesthetics.
Draughtproofing
Our comprehensive draughtproofing service eliminates air leakage through window joints and gaps. Using specialist techniques and materials, we stop rattling and draughts while improving noise insulation. The process maintains operational functionality of sash windows while enhancing comfort and reducing heating costs through improved air-tightness.
Frame Repairs
We repair rotten window frames using traditional carpentry techniques combined with modern materials like Window Care resin. Our splicing and reinforcement methods permanently resolve decay issues while preserving original timber elements. This approach maintains heritage value and structural integrity more effectively than complete frame replacements.
Bespoke Joinery
We create made-to-measure windows and doors matching period specifications. Using premium timbers and traditional joinery methods, we produce components that seamlessly integrate with existing architectural features. Our bespoke service includes matching historical mouldings and profiles for authentic replacements that maintain building character.
People
Malcolm Mew
Managing Director
With over 40 years in construction, Malcolm founded Sash Window Heritage in 2007. He specialises in preserving timber window heritage while integrating modern double glazing technology for improved efficiency.
Graham May
Director
Graham has over 25 years of timber restoration experience. He focuses on combining traditional techniques with modern methods to maintain period character while enhancing window performance and longevity.
Mark Whalley
Senior Fitter
Mark brings 21 years of window industry experience to our team. He excels at complex restoration projects and continually refines techniques to improve installation quality and durability.
Tony Thompson
Painter
Tony provides specialist painting services with over 27 years of experience. He ensures every restoration project receives a flawless finish that complements the enhanced window functionality.
Jake Hallett
Carpentry Specialist
Jake has rapidly developed expertise in traditional sash window work. His carpentry skills and enthusiasm contribute significantly to achieving precise restorations that meet the highest standards of quality.
Questions
What types of windows do you work with?
We specialise in sash windows, including Victorian and Georgian styles, as well as casement windows and doors. Our expertise preserves period features while upgrading performance.
How do your double glazed units preserve original appearance?
Our 10-12mm units are engineered to fit within original window frames without altering external appearance, maintaining traditional aesthetics while significantly improving insulation.
Do you repair or replace window frames?
We prioritise repair using traditional carpentry and modern materials like Window Care resin. Replacement only occurs when structural integrity cannot be restored through repair methods.
How long does a typical window restoration take?
Most single window restorations take 1-2 days. Larger projects vary based on complexity, with full property transformations typically completed within a week.
Are your services available outside London?
We cover the entire South East region. Our experience includes projects in Sussex, Surrey, Kent and surrounding counties while maintaining London as our primary base.
Can you match existing window details?
Yes, we can replicate original mouldings, profiles and architectural features to ensure seamless integration with existing window frames and building character.
