Business Details
Emergency
services
Expert Sash Window and Door Services in London
Box Sash London Joinery has been serving London and the South for over 30 years, specialising in the repair, restoration, and installation of traditional timber sash windows and doors. Our team combines modern techniques with traditional craftsmanship, drawing on nearly 30 years of experience in carpentry, joinery, and glazing. Based in North London, we operate from dedicated workshops and offer a comprehensive service adhering to all building and health and safety regulations. As registered members of FENSA and GGFi, we provide homeowner protection and fully guarantee all our work. Our services include draught proofing, glass glazing, emergency repairs, and bespoke joinery, tailored to individual client needs and budgets.We pride ourselves on preserving Londons architectural heritage while delivering energy-efficient solutions that enhance both aesthetics and functionality. Our commitment to quality is reflected in our 20-year guarantees on doors and our reputation for exceptional after-sales service. Open six days a week, we handle projects from small repairs to full restorations, ensuring every client receives a professional, cost-effective service. Our expertise extends to listed buildings and conservation areas, where we maintain historical integrity while meeting modern standards. With a focus on sustainability, we prioritise restoration over replacement to reduce environmental impact and client costs.
Services
Sash Window Installation
Restoration
Glass Glazing
Draught Proofing
Emergency Repairs
Joinery Doors
Double Glazing
Project Management
Bespoke Joinery
Supply and Fit Services
Highlights and features
- We offer over 30 years of specialist experience in sash window restoration.
- All work is guaranteed and meets building regulation standards.
- Registered members of FENSA for homeowner protection.
- Open six days a week with flexible service options.
- Bespoke solutions tailored to individual budgets and conservation requirements.
Associations and certifications
- FENSA
- GGFi
What people say
Fantastic work
Delighted with result
Excellent local firm
Superb attention to detail
Happy with service
Services
Sash Window Installation
We professionally install traditional cord hung, spiral hung, and vertical/horizontal sliding sash windows to precise specifications. Our installations meet all building regulations while maintaining historical accuracy. Clients benefit from improved security, energy efficiency, and aesthetic continuity with period properties.
Sash Window Restoration
Specialist restoration services for sash and casement windows in listed buildings and conservation areas. We rejuvenate tired windows through draught proofing, repainting, and component replacement while preserving original architectural character. This cost-effective solution maintains heritage value and reduces environmental impact.
Draught Proofing
Our draught proofing solutions eliminate heat loss and noise infiltration without altering window aesthetics. Using premium materials, we seal air gaps around sashes to improve thermal efficiency, reduce energy bills, and enhance comfort while maintaining smooth window operation.
Glass Glazing
We provide comprehensive glazing services including toughened glass installation, secondary glazing for noise reduction, and glass repair/replacement. Our solutions maintain original window appearance while improving security and thermal performance through modern glass technology.
Emergency Repairs
24-hour emergency service for broken sash cords, damaged glass, and security-compromised windows. Our rapid response team operates seven days a week to restore safety and functionality, ensuring immediate resolution for urgent window issues across London.
Questions
What areas do you serve?
We operate across London and the surrounding South England regions.
Do you handle emergency window repairs?
Yes, we offer 24-hour emergency repair services for broken sash cords or glass.
Are your services guaranteed?
All our work comes with comprehensive guarantees, including 20-year warranties on doors.
Can you work on listed buildings?
Yes, we specialise in preserving historical integrity for listed buildings and conservation areas.
How long have you been in business?
We have over 30 years of experience in sash window restoration and joinery.
