
We add a discreet secondary glazing layer and upgrade seals around sashes/frames to improve thermal performance, reduce draughts and help stabilise room temperatures.
Benefits
Ideal for single-glazed or leaky frames, including period sashes. At survey we check frame condition, opening types, ventilation needs and access to recommend the right solution.





Most homes complete in a few hours per room, subject to access and window count.
You’ll receive installation records and simple care guidance. Where eligible, ECO4 routes may support approved measures; anything outside scope is quoted transparently.
We’re here to ensure your experience with us is as seamless and enjoyable as possible.
No—sashes and casements remain operable; we set up seals for smooth use.
Improved sealing and secondary glazing can help; we also maintain ventilation to manage moisture.
Yes—secondary systems are discreet and typically reversible, preserving original windows.
Often a few hours per room; larger homes may take longer.
Not always—secondary glazing and draught-proofing provide a strong thermal uplift with less disruption.
Tell us your postcode and a few details. We’ll confirm ECO4 eligibility, arrange a survey, and manage everything from funded supply to sign-off.
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