Business Details
Premium Windows & Doors in Chesterfield
Keystone Supplies is a leading provider of high-performance glazing solutions, specialising in the supply and installation of bespoke timber, aluminium, and composite windows and doors. Our expertise spans heritage projects on listed buildings to cutting-edge passive house developments, ensuring every client receives tailored solutions that meet exacting standards. Partnering with industry leaders like Velfac and Rationel, we combine innovative design with sustainable materials to deliver products renowned for durability, insulation, and aesthetic appeal.Based in Chesterfield, Derbyshire, we serve clients nationwide, offering a seamless process from consultation to installation. Our commitment to craftsmanship and customer satisfaction is reflected in our made-to-measure approach, which prioritises energy efficiency, security, and architectural harmony. With decades of collective experience, our team ensures every project is executed flawlessly, enhancing both residential and commercial properties across the UK.
Services
Timber Windows
Sash Windows
Aluminium Windows
Bi-Fold Doors
Conservatories
Orangeries
Secondary Glazing
Roof Lights
Steel Doors
Timber Effect UPVC
Highlights and features
- We partner with industry leaders like Velfac and Rationel for premium quality assurance.
- Our team handles heritage restorations to modern passive house projects with equal expertise.
- Bespoke made-to-measure glazing solutions tailored to architectural and energy efficiency needs.
- Nationwide service with local expertise based in Chesterfield, Derbyshire.
- Comprehensive project management from design to flawless installation.
What people say
Excellent service
Quality product
Professionalism
Perfectly finished
Changed our home
Services
Timber Windows
Our timber windows combine traditional craftsmanship with modern engineering for superior insulation and durability. Available in sash, casement, and flush designs, they enhance period and contemporary properties alike. Each unit is custom-made to meet specific architectural and energy efficiency requirements.
Bi-Fold Doors
Aluminium and timber bi-fold doors create seamless transitions between indoor and outdoor spaces. Featuring slim frames and weather-resistant materials, they offer unobstructed views and secure, smooth operation. Ideal for modernising homes or commercial spaces.
Conservatories
Custom-built conservatories blend natural light with thermal efficiency using high-performance glazing and durable framing. Designed to complement existing architecture, they provide year-round usable spaces for residential properties across the UK.
Secondary Glazing
Secondary glazing systems improve soundproofing and thermal retention in existing windows. Ideal for listed buildings and noisy urban areas, these discreet solutions maintain original aesthetics while enhancing comfort and energy efficiency.
Aluminium Windows
Contemporary aluminium windows offer sleek profiles and robust weather resistance. Available in powder-coated finishes, they suit modern developments and commercial projects requiring low-maintenance, durable glazing solutions with slim sightlines.
Questions
What types of windows do you supply?
We offer timber, aluminium, composite, and UPVC windows in sash, casement, and passive house designs tailored to residential and commercial needs.
Do you work on listed buildings?
Yes, our team specialises in heritage projects, providing sympathetic glazing solutions that meet conservation requirements while improving performance.
What areas do you serve?
While based in Chesterfield, Derbyshire, we operate nationwide across the UK for both residential and commercial installations.
How long does installation take?
Most projects are completed within 7-8 weeks from order confirmation, depending on design complexity and material availability.
Can I visit your showroom?
Our showroom in Hasland is open Monday-Friday 9am-4pm, with Saturday appointments available upon request.
What guarantees do you offer?
We provide comprehensive warranties on all products, backed by our commitment to quality craftsmanship and customer satisfaction.
