Business Details
Your Trusted Building Supplies Partner in Chesterfield
Keystone Supplies has established itself as a leading provider of high-performance glazing solutions across the UK. Specialising in the supply and installation of bespoke windows and doors crafted from timber, aluminium, and composite materials, we cater to both heritage projects and contemporary developments. Our partnerships with industry leaders like Velfac, Rationel, and Cortizo ensure our clients receive premium products backed by innovation and expertise. Based in Chesterfield, Derbyshire, we combine local craftsmanship with nationwide reach to deliver exceptional results tailored to each project's unique requirements. With decades of collective experience, our team excels in transforming architectural visions into reality, whether preserving historical landmarks or creating cutting-edge passive house designs.Every order is executed with meticulous attention to detail, ensuring seamless delivery and hassle-free client experiences. Our commitment to excellence extends from initial consultation through final installation, prioritising customer satisfaction at every stage. The showroom at Storforth Lane Trading Estate offers personalised consultations, with extended hours available upon request. As an independent supplier, we maintain flexibility to design and supply entire projects, meeting diverse development needs while upholding the highest standards of quality and service.
Services
Timber Windows
Aluminium Windows
Composite Doors
Conservatories
Secondary Glazing
Roof Lights
Bi-Fold Doors
Steel Doors
Timber Effect UPVC
Passive House Systems
Highlights and features
- Specialise in heritage and modern glazing projects with 30+ years combined experience
- Partner with industry-leading manufacturers for guaranteed product quality
- Offer nationwide installations while maintaining local craftsmanship standards
- Provide fully bespoke made-to-measure solutions for unique architectural needs
- Maintain showroom with extended hours for personalised client consultations
Associations and certifications
- Velfac
- Rationel
- Cortizo
What people say
Excellent service
Quality product
Perfectly finished
Changed our home
Attentive eye
Services
Timber Windows
Our bespoke timber windows combine traditional craftsmanship with modern engineering. Available in sash, casement, and flush designs, these windows offer superior thermal efficiency and security. Each unit is made to measure using sustainably sourced hardwoods like oak and meranti, finished with high-performance coatings that require minimal maintenance while preserving natural aesthetics.
Aluminium Windows
Contemporary aluminium windows provide sleek profiles and exceptional durability. Our systems feature thermal breaks for energy efficiency while maintaining slim sightlines that maximise natural light. Available in custom RAL colours with optional dual-tone finishes, these windows suit both modern new builds and heritage refurbishments requiring discreet modern solutions.
Composite Doors
Combining timber's warmth with aluminium's resilience, our composite doors offer optimal performance. Internally finished with natural wood grains and externally clad in low-maintenance aluminium, these doors feature advanced security systems including multi-point locking and anti-burglary glass options. Available in traditional and contemporary styles to complement any property type.
Conservatories
Custom-designed conservatories create seamless transitions between indoor and outdoor spaces. Using thermally efficient glazing systems and matching roof solutions, our structures provide year-round usability. Options include Victorian, Edwardian, and modern lean-to designs with full specification choices for frames, glass types, and internal finishes.
Secondary Glazing
Enhance energy efficiency and reduce noise with our secondary glazing systems. Ideal for period properties and conservation areas, these solutions maintain original window integrity while adding thermal insulation and security benefits. Available in timber or aluminium frames with various opening configurations to suit different architectural styles.
Questions
What materials do you work with for window installations?
We specialise in timber, aluminium, and composite materials, offering bespoke solutions that combine traditional craftsmanship with modern performance requirements.
Do you handle both residential and commercial projects?
Yes, we provide tailored glazing solutions for both domestic properties and commercial developments across the UK.
How long does the typical installation process take?
Standard installations typically take 7-8 weeks from order confirmation, with bespoke or large-scale projects requiring additional time as specified.
Are your products energy efficient?
All our windows and doors meet current building regulations with U-values as low as 1.1W/m²K, featuring argon gas-filled double glazing and low-E coatings.
Do you offer showroom consultations?
Our Chesterfield showroom offers personalised consultations Monday-Friday 9am-4pm, with Saturday appointments available upon request.
What security features are available?
We offer anti-burglary glass options, multi-point locking systems, and reinforced frames to meet Secured by Design standards for enhanced property security.
