Retrofit vs Replacement Windows in Christchurch
Compare retrofit double glazing vs full window replacement for Christchurch homes, including cost, disruption, frame condition, and when each option makes sense.
Retrofit vs Replacement Windows: Quick Recommendation
Choose retrofit double glazing when the existing aluminium or timber frames are straight, watertight, and strong enough for insulated glass units. Choose full replacement when frames are rotten, leaking, structurally poor, or when you want a complete joinery upgrade.
| Retrofit | Lower disruption, keeps existing frames, usually cheaper. |
| Replacement | Best for failed frames, layout changes, or full thermal system upgrades. |
Cost and Disruption
Retrofit is often 30-60% cheaper than full window replacement because the frame remains in place. Full replacement costs more because it includes joinery, removal, installation, finishing, and possible consent or trim work.
For Christchurch homes, the best first step is a frame assessment before assuming either option is right.
Get a Christchurch Retrofit Assessment
The right answer depends on frame condition, glass size, exposure, access, and whether the existing joinery can safely carry an insulated glass unit.