At GBS Joinery, we’re proud to craft all of our bespoke timber windows and doors using Accoya® timber, a revolutionary wood that’s sustainable, stable, and guaranteed to last.
Accoya timber is created through an advanced modification process called acetylation. This technique transforms sustainably sourced softwood into a highly durable material that outperforms traditional timbers and even rivals PVC in terms of lifespan.
We only want to give our customers the best. Accoya timber allows us to combine the timeless beauty of bespoke joinery with a product that:
• Is guaranteed for 50 years above ground and 25 years below ground
• Is highly stable – it won’t shrink, swell, or warp with changes in the weather
• Offers exceptional durability – resisting rot, decay, and insect damage
• Is environmentally responsible – made from FSC® certified sustainable sources
• Takes paint and coatings beautifully – requiring less maintenance and lasting longer between repaints
It’s a common misconception that PVC windows and doors are the most durable option. In reality:
• uPVC degrades over time – it can discolour, become brittle, and is prone to warping with exposure to sun and temperature changes.
• uPVC has a limited lifespan – typically around 20–25 years before it needs replacing.
• Accoya® outlasts uPVC – with a 50-year above-ground guarantee, Accoya® timber is proven to last twice as long as uPVC.
Lifespan
Accoya: Guaranteed 50 years above ground (25 years in-ground)
uPVC: Typically, 20–25 years before replacement
Durability
Accoya: Resistant to rot, decay, and insects
uPVC: Can warp, discolour, and become brittle over time
Stability
Accoya: Won’t shrink, swell, or distort with weather changes
uPVC: Can expand/contract with heat and cold |
Aesthetics
Accoya: Natural beauty of real wood, can be finished in any colour
uPVC: Limited design options, plastic appearance
Sustainability
Accoya: FSC® certified, environmentally responsible
uPVC: Made from non renewable plastics, harder to recycle |
Maintenance
Accoya: Takes paint/coatings beautifully, lasts longer between repaints
uPVC: Low initial maintenance, but replacement needed sooner
Investing in Accoya® timber windows and doors means:
• You’ll enjoy lower maintenance costs and less hassle over the decades.
In short, Accoya® gives you the best of both worlds – the warmth and character of real wood, with durability that outperforms uPVC.
• See examples of our work on our Case Studies page
• Explore our Windows Gallery and Doors Gallery
• Read our Customer Testimonials
Contact us for a free, no obligation consultation!
✅ SEASONAL CHECK-UP
Enjoy a Seasonal Check-Up of your GBS-installed joinery – Free of Charge.
We’ll assess weather damage, test hardware, and ensure your doors and windows are season-ready.
✨ GBS VIP VALET CARE PLAN
Our professional valet service combines detailed cleaning with expert maintenance – ideal for homeowners who want hands-off peace of mind and pristine windows and doors.
✔️ Timber-safe cleaning and product application
✔️ Proactive inspection to catch issues early
✔️ Lubrication and resealing where needed
✔️ Exclusive for GBS Joinery clients
🪣GBS CLEAN CARE KIT
Our Kit Includes:
✔️ Concentrated alkaline cleaner for removing dirt and grease
✔️ A water-based product to revive faded finishes
✔️ A quality microfibre cloth
Everything you need to preserve the showroom finish of your GBS Joinery timberwork — right at your fingertips.
We discuss with you the best solutions and applications for your needs, helping you to make informed decisions about your joinery needs.
We are always pleased to freely provide the best possible information and advice. We welcome your call so please do contact us.
Based in Stockport Cheshire we are happy to meet new customers and travel throughout neighbouring counties, Lancashire, Yorkshire, Shropshire, Staffordshire, to offer supply and installation, outside this area we can supply only.
