Sash Window Double Glazing
Double-glazed sash-window replacement planned to protect the property character while improving comfort.
The survey focuses on sash condition, box frame, glazing dimensions, balance system and the desired appearance so the suitable replacement or repair can be agreed.

Sash Window Double Glazing — assessment and replacement plan
What to prepare
Photos of the full sash window, frame details, access and any heritage constraints you know about.
What affects the quotation
Sash condition, glazing specification, timber work, access and finishing.
What is checked before sash window double glazing?
The survey checks sash condition, box frame, glazing dimensions, balance system and the desired appearance so the correct replacement or repair scope can be agreed.
Can just the failed sealed unit be replaced?
Often yes, where the existing frame is sound and suitable for a correctly specified replacement unit.
Can misted glass be repaired without replacing the sealed unit?
Persistent condensation between panes usually indicates a failed sealed unit. The practical remedy is normally replacement of that unit.
Can I improve warmth or noise control at the same time?
Yes, subject to the frame and opening being suitable for the proposed glazing specification.
What information should I prepare?
Photos of the full sash window, frame details, access and any heritage constraints you know about.
What affects the price?
Sash condition, glazing specification, timber work, access and finishing affect the quotation.
Do replacement doors or low-level glazing need safety glass?
Safety-glass requirements depend on the location and use of the glazing. The replacement specification should reflect the opening and current requirements.
How quickly can I request help?
The enquiry line is available 24 hours. Attendance, manufacture and fitting times depend on the opening, glass specification and location.