Canberra made •
Improve comfort while retaining more of the original timber character where the existing frames and sashes are structurally suitable for an insulated glass upgrade.
A retrofit can work where timber is sound, sash depth and rebates can accommodate the glass unit, and retaining the existing appearance is important.
The condition and geometry of the existing timber determine whether a glass-only upgrade is practical. An assessment should compare what can be retained with the work needed to achieve your priorities.
Retrofitting is worth assessing when the timber is sound and retaining the existing appearance is important. The rebate depth, sash strength and operating hardware must suit the proposed insulated glass unit. Photos are a useful starting point, but they do not replace an on-site condition check.
Replacement may be more appropriate where frames are deteriorated, sashes are distorted or water entry and operation remain unresolved. It can also provide a different opening layout or frame system. Compare the complete scope—including repairs and finishes—with the proposed retrofit.
Ask about glass thickness and weight, hinges or sash balances, draught seals and drainage. Discuss how much existing timber can remain and what preparation or repainting is needed. Any heritage or appearance restrictions should be checked with the relevant adviser before work is agreed.
