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Business Details
21 Years
experience
Expert Sash Window Repair & Restoration in London
Established in 2005, Angel Sash Windows specialises in comprehensive repair, restoration, and renewal of box sash windows across North London. Our services include free surveys, written quotations, and fully guaranteed work executed to the highest standards. With a reputation for exceptional craftsmanship and competitive pricing, we prioritise customer satisfaction through meticulous attention to detail and repeat business from satisfied clients.

Our team ensures all projects adhere to modern building regulations while preserving the heritage of traditional sash windows. Public liability insurance and guarantees of up to five years underscore our commitment to reliability and trustworthiness.
Services
Draught-proofing Window Restoration Joinery Repair Timber Sill Replacement Sash Cord Replacement Sash and Frame Replacement Window Furniture Replacement Secondary Double-glazing Painting Service
Details
  • Year established: 2005
Highlights and features
  • Established in 2005, we bring extensive experience to sash window restoration.
  • We provide free surveys and detailed written quotations.
  • All work is fully guaranteed for your peace of mind.
  • Our team operates across all areas of North London.
  • Competitive pricing with a proven track record of customer satisfaction.
What people say
Excellent standard Reliable and efficient Considerable difference to noise Highly skilled Warmer and quieter rooms
Services
Draught-proofing
Draught-proofing reduces noise and cold air infiltration by fitting weather-pile brushes to sash windows. The process involves removing excess paint, preparing surfaces, and installing brushes on rails and frames. This service enhances energy efficiency while maintaining window functionality and aesthetics.
Window Restoration
Restoration work rejuvenates existing sash windows using hardwood splicing, decay treatment, and joint reinforcement. We preserve original timber where possible, extending window lifespan without full replacement. Techniques include filler application and structural repairs to maintain historical integrity.
Sash Cord Replacement
Replacing frayed or broken sash cords ensures smooth window operation. We use traditional cotton-waxed cords and recalibrate counter-balancing weights. This service restores functionality to aged windows, preventing further damage to frames and sashes.
Secondary Double-glazing
Secondary double-glazing adds an aluminium and hardwood sub-frame to existing windows. This system reduces heat loss, condensation, and noise levels without altering original window structures. Ideal for properties on busy roads requiring thermal and acoustic improvements.
Timber Sill Replacement
Decayed timber sills are replaced with hardwood units finished with aluminium primer. This prevents water damage and extends sill lifespan while maintaining compatibility with existing window frames. The service includes precise fitting to ensure weatherproofing and durability.
People
Mike Jankovsky
Owner
Mike Jankovsky, founder of Angel Sash Windows, brings over 15 years of expertise in sash window restoration. Known for reliability and precision, he ensures every project meets exacting standards while maintaining open communication with clients throughout the process.
Questions
What areas do you serve?
We operate across all areas of North London, providing sash window repair and restoration services to residential and commercial properties.
Do you offer guarantees on your work?
Yes, all new joinery and associated work is guaranteed for 5 years, while restoration work carries a 2-year guarantee.
What services do you provide?
Our services include draught-proofing, window restoration, sash cord replacement, secondary double-glazing, timber sill replacement, and window furniture upgrades.
How can I get a quote?
Contact us for a free survey; written quotations are emailed or posted within 5 working days, detailing costs for the work assessed.
Do you handle emergency repairs?
We prioritise urgent issues during standard working hours but do not offer out-of-hours emergency services.