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18 Years
experience
Expert Window Restoration for Listed Buildings
Chameleon Decorators & Windows Restoration has been specialising in the restoration of original sash windows and double glazing retrofitting since 2008. Our team of joiners, decorators, and experts focuses on preserving the historical integrity of listed properties while enhancing energy efficiency through innovative techniques. We combine premium materials like Accoya and Tricoya wood with traditional craftsmanship to deliver durable solutions, offering an 8-year guarantee on paintwork and 20 years on repaired parts. Operating across Cambridgeshire, Hertfordshire, Essex, and London, we provide tailored services for Grade 2 listed buildings and period properties.

Our in-house team ensures meticulous attention to detail, with a commitment to sustainability and client satisfaction. We pride ourselves on transparent communication, fixed timeframes, and a family-run ethos that prioritises long-term relationships over short-term gains. Our work includes repairing rotten frames, unblocking stuck sashes, installing vacuum double glazing, and draught-proofing, all while maintaining the aesthetic authenticity of historic windows. With over 500 happy customers, we stand as a trusted partner for window restoration projects requiring technical expertise and conservation-sensitive approaches.
Services
Sash window refurbishment Double glazing retrofitting Listed buildings restoration Draught proofing Frame repairs Glass replacement Paint spraying Functional restoration Bay window repair Casement windows restoration
Details
  • Year established: 2008
Highlights and features
  • We offer 20 years guarantee on repaired sash window parts
  • Our team has 16 years experience in period property window restoration
  • We provide full-service solutions from repairs to vacuum double glazing
  • We operate with fixed timeframes and transparent pricing
  • Our family-run business prioritises sustainability and client satisfaction
What people say
Excellent service Professional team Highly recommend Great results Prompt communication
Services
Sash window refurbishment
Our sash window refurbishment service combines traditional craftsmanship with modern materials to restore period windows to their original condition. We repair rotten frames using Tricoya wood lamination, replace damaged components, and apply durable paint finishes. This process preserves historical authenticity while extending window lifespan by decades. The service includes comprehensive repairs to sashes, frames, and mechanisms.
Double glazing retrofitting
We retrofit vacuum double glazing into existing sash windows to improve thermal efficiency without altering appearance. Our ultra-thin units (7mm) provide triple-glazing performance while maintaining heritage aesthetics. The process includes frame reinforcement, weight adjustment, and draught-proofing to ensure optimal functionality and energy savings for listed properties.
Listed buildings restoration
Specialised restoration services for Grade 2 listed buildings maintain original character while addressing modern requirements. We perform like-for-like repairs to timber frames, install conservation-approved double glazing, and implement draught-proofing solutions. Our methods comply with planning regulations and preserve historical integrity while improving functionality and energy efficiency.
Draught proofing
Our draught-proofing solutions seal gaps in sash windows without compromising historical features. We install discreet seals and adjust mechanisms to reduce heat loss by up to 10%. This service can be combined with double glazing or performed as a standalone energy efficiency improvement for period properties.
Frame repairs
We repair rotten or damaged window frames using durable Tricoya wood laminates that resist decay for decades. Our process involves removing decayed sections, reinforcing structures, and applying protective coatings. This extends window lifespan while maintaining original appearance and functionality.
Questions
How much does sash window restoration cost?
Restoration starts at £500 per window, depending on repairs needed and access.
Do you work on Grade 2 listed buildings?
Yes, we specialise in like-for-like repairs for listed properties without planning permission.
Can you install double glazing in original frames?
Yes, we retrofit ultra-thin vacuum double glazing into existing timber frames.
What guarantees do you offer?
20 years on repairs, 8 years on paintwork, and 15 years on vacuum glazing units.
How long does window restoration take?
A 15-window project typically takes 5-7 days to complete.
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