Replacing windows or fitting out a new build? The choice comes down to two materials: timber or uPVC.
Both have their place. The right answer depends on what matters most to you. Appearance, longevity, energy performance, or budget.
We manufacture timber windows every day from our West Yorkshire factory. We know where timber excels. And we know where uPVC might be the more practical choice. Here’s an honest comparison across the things that matter most.
Appearance
This is where timber stands apart.
Wooden windows have a natural warmth and depth that uPVC can’t replicate. The grain, the texture, the way timber sits within a property. Synthetic materials struggle to match it, especially on period or character homes.
uPVC has improved over the years. Modern profiles are slimmer. Woodgrain foil wraps are available. But up close, the difference is clear.
You pull up to view a stone terrace in Hebden Bridge. The windows tell you everything before you walk through the door. Timber just looks right on these buildings. uPVC doesn’t.
For listed buildings and conservation areas, planning officers require timber as a condition of approval. uPVC is regularly refused in these settings.
Durability and Lifespan
This is where outdated assumptions get people into trouble.
Older timber windows could be prone to rot, warping, and swelling. That was down to untreated softwood and poor maintenance. It gave timber a reputation for being high-maintenance.
Modern timber windows are a different product entirely.
We use Accoya timber as standard. It’s a modified hardwood, engineered to resist rot, warping, and insect attack. Combined with factory-applied coatings and traditional joinery techniques, our timber windows come with a 50-year guarantee.
A good quality uPVC window will last 20 to 25 years before the frames start to discolour, the seals degrade, and the mechanisms wear out. After that, the entire frame needs replacing. You can’t repair or restore uPVC the way you can timber.
Timber windows can be sanded, recoated, and refurbished. A well-maintained timber window can serve a building for generations.
Energy Efficiency
Both materials perform well here. The differences are smaller than most people expect.
The glazing unit itself does most of the insulating work, regardless of the frame material.
That said, timber is a naturally insulating material. It doesn’t conduct heat the way metal does, and it performs comparably to uPVC in standard U-value tests. Our windows are fitted with toughened A-rated double glazing as standard, built for strong thermal performance.
Where timber has an edge is in how it ages. uPVC frames can warp over time as the plastic expands and contracts with temperature changes. That compromises the seal. Timber is more dimensionally stable. Accoya in particular has 75% less swelling and shrinkage than conventional timber.
Sustainability
If environmental impact matters to you, timber is the clear winner.
Timber is a natural, renewable material. The Accoya we use is FSC and PEFC certified, sourced from responsibly managed forests. It’s also carbon negative over its lifecycle. The carbon stored in the wood outweighs the carbon produced during manufacturing.
uPVC is a petroleum-based plastic. Manufacturing it is energy-intensive. While some recycling programmes exist, most old uPVC windows end up in landfill. They’re not biodegradable.
Our timber windows are 100% recyclable at the end of their life. And since they’re likely to last twice as long as uPVC in the first place, the environmental difference compounds over time.
Maintenance
This is where uPVC has had the advantage. And it’s still a fair point. uPVC frames need very little beyond an occasional wipe down.
Timber windows do require periodic maintenance. With modern factory-applied finishes, we recommend an inspection and a light maintenance coat every 8 to 10 years, depending on exposure. South-facing windows in exposed locations may need attention sooner.
But here’s the trade-off.
When a timber window needs work, it can be repaired, sanded, and recoated rather than replaced. A scratch or dent in uPVC is permanent. Discolouration is permanent. When uPVC fails, your only option is a full replacement.
Cost
There’s no getting around it. Timber windows cost more upfront than uPVC. Bespoke, made-to-measure timber windows are a premium product, and the price reflects the materials and craftsmanship involved.
But the comparison changes when you look at the full cost of ownership.
Say you’re renovating a 1920s semi in Ilkley. A set of uPVC windows might last 20 years. A set of timber windows, properly maintained, could last 50 years or more. Over the life of that building, timber works out cheaper because you’re not replacing them as often.
There’s also the question of property value. Timber windows are widely seen as a premium feature, particularly on period and character properties. They add value in a way that uPVC rarely does.
Which Should You Choose?
uPVC is a reasonable choice if you’re working to a tight budget on a modern property where appearance is less of a priority and you want minimal maintenance.
Timber is the better choice if you value craftsmanship, want windows that will last decades, care about environmental impact, or own a period, listed, or character property where appearance and planning requirements matter.
We manufacture bespoke timber windows from our factory in West Yorkshire, including sliding sash windows, flush casement windows, and stormproof windows. All made to measure. All backed by our 50-year guarantee. We supply nationwide and install across Yorkshire.
If you’d like to discuss your project or get a quote, call us on 01274 911 316 or use our contact form.
