Business Details
19 Years
experience
Emergency
services
Expert Sash Window Restoration Services
Established in 2007, Sash Window Heritage specialises in the restoration and modernisation of traditional sash windows. Our expertise lies in retrofitting period properties with 10-12mm double-glazed units that maintain original aesthetics while significantly improving thermal efficiency. With decades of combined experience in timber restoration and construction, our team combines traditional craftsmanship with advanced materials like Slender Fit and Fineo glazing technologies.We offer comprehensive services including draughtproofing, resin repairs, and bespoke joinery for heritage buildings across London and the South East. Our commitment to preserving architectural integrity while delivering modern performance has made us a trusted choice for homeowners seeking both authenticity and energy efficiency. We operate a FREE site survey policy and maintain rigorous quality standards through our specialist surveyors, joiners, and painters.
Services
Sash window restoration
Double glazing installation
Draughtproofing services
Timber repair
Bespoke joinery
Window painting
Casement window overhaul
Feature window creation
Conservation area work
Bay window restoration
Details
- Year established: 2007
Highlights and features
- 40+ years combined experience in heritage window restoration
- Pioneers in 10mm double-glazed unit installations for period properties
- Recognised specialists in Window Care resin repair systems
- FREE site surveys and no-obligation quotations available
- Serving London and the South East with local expertise
What people say
Look fab
Transformed the look
Satisfied with results
Expertise evident
Smooth operation restored
Services
Sash window restoration
Specialist restoration of period sash windows using traditional carpentry techniques combined with modern materials. Our process retains original architectural details while improving functionality and thermal performance. Services include frame repairs, resin treatments, and hardware upgrades for heritage properties.
Double glazing installation
Installation of ultra-thin 10-12mm double-glazed units into existing sash windows. This innovative solution maintains period aesthetics while achieving U-values as low as 1.2. We use Slender Fit and Fineo technologies to deliver significant energy savings without altering window appearance.
Draughtproofing services
Comprehensive draught elimination for sash and casement windows. Our system seals gaps while maintaining operational functionality, reducing heat loss by up to 75%. The process includes sealing rebates, fitting draught strips, and balancing window mechanisms for smooth operation.
Timber repair
Specialist timber restoration using Window Care resin systems and traditional splicing techniques. We repair rotten frames, sills, and mouldings to original condition without full replacement. Our methods preserve historical accuracy while ensuring structural integrity and longevity.
Bespoke joinery
Made-to-measure window and door solutions for period properties. We create exact replicas of original features using traditional joinery methods. Services include manufacturing new box sashes, casement windows, and decorative elements to match existing architectural styles.
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. His expertise ensures traditional methods meet contemporary performance standards.
Graham May
Director
Graham brings 25+ years of timber restoration experience. He focuses on maintaining period character while delivering high-standard repairs. His attention to detail ensures original windows retain their historical integrity through modern conservation techniques.
Mark Whalley
Senior Fitter
With 21 years in the timber window industry, Mark leads installation projects. His technical expertise ensures precise fitting of double-glazed units while maintaining traditional window functionality and aesthetics.
Tony Thompson
Painter
Tony has 27 years of specialist painting experience. He ensures all restored windows receive durable, period-appropriate finishes using traditional techniques that enhance both appearance and weather protection.
Jake Hallett
Carpentry Specialist
Jake combines modern carpentry skills with heritage window expertise. His two years with the company have seen rapid mastery of traditional techniques, making him vital for complex restoration projects.
Questions
Can you install double glazing without replacing original sash windows?
Yes, we retrofit 10-12mm double-glazed units into existing sash windows, preserving original frames and architectural details while improving thermal efficiency.
Do you work on listed buildings or conservation areas?
Yes, we specialise in heritage properties including conservation areas. Our methods maintain period authenticity while meeting modern performance requirements.
How long does a typical window restoration take?
Most projects take 5-7 days depending on window quantity and condition. Complex bay windows or multiple floors may require additional time.
What's the energy saving benefit of your glazing?
Replacing single glazing with our units reduces heat loss by 75% and cuts carbon emissions by 90kg per square metre annually.
Do you offer guarantees on your work?
Yes, we provide warranties covering materials and workmanship. Specific terms vary by service type and are confirmed before project commencement.
Can you match existing window profiles exactly?
Our bespoke manufacturing ensures perfect matches for period window profiles, including custom mouldings and traditional hardware details.
