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Trinity Glazing - Edinburgh's Leading Glass Suppliers
Established as Edinburgh's leading glass and glazing specialists, Trinity Glazing has dedicated itself to delivering premium windows, doors, and double glazing solutions across Edinburgh and the Lothian area. Our expertise spans over decades, combining traditional craftsmanship with modern innovation to meet both trade and public needs. As manufacturers of Slimtech Heritage double glazed units, we specialise in replicating original single-glazed aesthetics while achieving contemporary energy efficiency standards. Our commitment to sustainability drives every product we supply, ensuring environmental responsibility without compromising performance. Recognised by Police Scotland and Trading Standards through our Edinburgh Trusted Trader accreditation, we maintain rigorous quality controls and customer service excellence.

With a comprehensive delivery service direct to job sites and a vast inventory including UPVC windows, composite doors, and custom glass solutions, we cater to diverse project requirements. Our team of skilled professionals, from directors to apprentices, ensures every client receives tailored support and technical expertise. Backed by genuine customer feedback and industry partnerships, we provide transparent pricing and reliable service delivery. From secondary glazing to mirrored glass installations, our product range addresses both residential and commercial needs. As a family of dedicated staff including production managers, glaziers, and office administrators, we uphold our reputation as trusted suppliers in Scotland's capital.
Services
Double Glazed Units UPVC Windows Composite Doors Secondary Glazing Glass Supply
Highlights and features
  • We are Edinburgh's largest glass merchant with dedicated trade delivery service
  • Our Slimtech Heritage units combine traditional aesthetics with modern performance
  • Vetted by Police Scotland and Trading Standards for quality assurance
  • Specialists in both contemporary and heritage building requirements
  • Comprehensive product range from UPVC windows to bespoke glass solutions
Associations and certifications
  • Edinburgh Trusted Trader Scheme
What people say
Excellent product quality Reliable delivery service Expert technical knowledge Competitive trade pricing Authentic heritage solutions
Services
Double Glazed Units
Our Slimtech Heritage double glazed units combine traditional aesthetics with modern energy efficiency. Using advanced warm edge spacer technology, these units replicate original single-glazed windows while achieving contemporary thermal performance. Ideal for both heritage restoration projects and new builds requiring narrow sightlines, our units offer durability and improved insulation. The innovative design allows for authentic window replacements that meet current building regulations without compromising visual appeal.
UPVC Windows
We supply high-quality UPVC windows in various styles including casement, French, and shaped frames. Our PVCu solutions offer excellent thermal efficiency, low maintenance requirements, and enhanced security features. Available in multiple colours and finishes, these windows suit both modern and traditional properties. The durable material resists weathering while maintaining structural integrity over time, making them a cost-effective choice for residential and commercial applications across Edinburgh and Lothian.
Composite Doors
Our composite door range combines strength, insulation, and aesthetic appeal in one durable solution. Constructed with multiple materials including reinforced frames and high-density cores, these doors offer superior security and weather resistance. Available in various designs and finishes, they complement different architectural styles while maintaining energy efficiency. The robust construction provides long-lasting performance, making them ideal for both residential properties and commercial buildings seeking enhanced security without compromising visual appeal.
Secondary Glazing
We provide secondary glazing solutions to improve thermal efficiency and noise reduction in existing windows. This system involves installing an additional internal glazed panel to create an insulating air gap, helping reduce energy costs and improve comfort. Particularly beneficial for listed buildings and conservation areas where original windows cannot be replaced, our secondary glazing maintains historical integrity while delivering modern performance benefits through improved insulation and soundproofing capabilities.
Glass Supply
As Edinburgh's largest glass merchant, we supply a comprehensive range of glass products for trade and public customers. Our inventory includes toughened, laminated, and decorative glass in various thicknesses and finishes. We offer cut-to-size services for mirrors, windows, and bespoke installations, supporting both domestic and commercial projects. The extensive selection caters to diverse applications from safety glass for commercial premises to decorative options for residential interiors, ensuring suitable solutions for every requirement.
People
Jason
Director
With extensive industry experience, Jason oversees strategic operations and business development at Trinity Glazing. He ensures the company maintains its position as Edinburgh's leading glass supplier while driving innovation in product offerings and customer service standards.
Lisa
Director
Lisa manages key business functions and sustainability initiatives at Trinity Glazing. Her leadership focuses on maintaining quality control across all products and ensuring the company's environmental commitments align with industry best practices and customer expectations.
Douglas
Foreman
As production foreman, Douglas supervises manufacturing operations and quality assurance processes. He ensures all sealed units and glazing products meet exacting standards before dispatch, drawing on years of technical expertise in glass manufacturing and quality control.
Paddy
Production Manager
Paddy oversees production workflows and team coordination at Trinity Glazing's manufacturing facility. His role ensures efficient operations while maintaining product consistency and adherence to technical specifications for all custom-made glazing solutions.
Scott
Sealed Unit Manufacturer
Scott specialises in sealed unit production, applying technical expertise to create high-performance double glazed units. His work ensures the company's Slimtech Heritage range maintains both aesthetic authenticity and modern energy efficiency standards for heritage and contemporary buildings.
Questions
What areas do you serve?
We primarily serve Edinburgh and the Lothian region, providing both trade and public customers with quality glazing solutions and onsite delivery services.
Are you part of any accreditation schemes?
Yes, we're members of the Edinburgh Trusted Trader scheme, independently verified by Police Scotland and Trading Standards for business integrity and customer service.
Do you offer delivery services?
Yes, we provide direct job-site delivery for trade customers with competitive pricing and efficient logistics across Edinburgh and surrounding areas.
What makes your Slimtech Heritage units special?
These units combine traditional aesthetics with modern performance, replicating original single-glazed windows while achieving contemporary thermal efficiency and narrow sightlines.
Can you supply both standard and custom glass?
We offer standard products plus cut-to-size solutions for mirrors, windows, and bespoke installations to meet specific project requirements for residential and commercial clients.
How do you support sustainability?
Our manufacturing processes prioritise energy efficiency, and we help customers reduce energy consumption through high-performance glazing solutions that meet modern environmental standards.
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