The Short Answer
For period properties, Conservation Area homes, and anyone who values longevity and property value — yes, timber windows are worth the extra cost. For a modern new-build where appearance is less critical and budget is tight — uPVC may be the pragmatic choice. We manufacture timber windows, but we would rather give you an honest answer than sell you something you do not need.
Where Timber Wins
Lifespan
Timber windows last 60–100 years with proper maintenance. uPVC windows last 20–25 years and cannot be repaired — when they fail, you replace the entire unit. Over a 50-year period, you will replace uPVC windows at least twice. Timber windows, maintained with a repaint every 8–12 years, will still be going strong.
Property Value
Estate agents consistently report that timber windows add value to period properties, while uPVC can reduce value — particularly on Georgian, Victorian, and Edwardian homes in desirable London areas. If you plan to sell within the next 10–20 years, timber windows are an investment that pays back.
Appearance
There is no uPVC window that looks as good as timber. Modern uPVC has improved, but the profiles are thicker, the joints are welded rather than jointed, and the surface finish lacks the depth and character of painted wood. On a period property, the difference is immediately obvious from the street.
Conservation Areas
Most London Conservation Areas and Listed Building consents require timber windows. uPVC is rarely accepted. If your property is in a Conservation Area, timber is not a luxury — it is a requirement.
Where uPVC Wins
Upfront Cost
uPVC sash windows cost £400–£800 per window. Timber sash windows cost £815–£2,100. If budget is the primary concern and you do not need to meet Conservation Area requirements, uPVC is cheaper today.
Maintenance
uPVC requires no painting. Wipe it down occasionally and it looks fine for its 20–25 year lifespan. Timber requires repainting every 8–12 years at a cost of approximately £100–£200 per window each time.
50-Year Cost Comparison (10 Windows)
| Factor | Timber | uPVC |
|---|---|---|
| Initial cost | £8,150 – £21,000 | £4,000 – £8,000 |
| Maintenance (50 years) | £5,000 – £10,000 | £0 |
| Replacement at year 25 | £0 | £4,000 – £8,000 |
| Total 50-year cost | £13,000 – £31,000 | £8,000 – £16,000 |
| Remaining lifespan at year 50 | 10 – 50 years | 0 (needs 3rd replacement) |
The raw numbers favour uPVC over 50 years. But factor in property value, energy savings from better glazing, and the fact that timber windows still have decades of life left at year 50 — and the gap narrows or reverses entirely for period properties in London.
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