Find 5 Door & Window Companies You Can Count On in Belfast

Dessian Products is a leading manufacturer of high-quality PVCu windows, doors, and conservatories, specialising in REHAU profile systems. Established in 1985, we combine 40 years of expertise with ISO-certified processes to deliver energy-efficient, secure, and aesthetically designed products. Our solutions cater to trade installers, house builders, and public sector clients across the UK and Ireland, supported by technical innovation, nationwide delivery, and dedicated customer support.

Baskil Windows specialises in the design and manufacture of windows and doors for passive buildings, with certified ranges by the Passive House Institute. We offer a comprehensive range of products and services, including bespoke windows and doors, and expert aftercare and support. Our commitment to sustainability is at the core of our operations, with on-site wind turbines, biomass CHP, and comprehensive recycling systems. We work closely with architects and builders to provide solutions for any project, big or small, and our products are fully guaranteed.

Northern Windows & Joinery specialises in bespoke timber, PVC, and composite windows and doors. With over 40 years of experience, we deliver energy-efficient, durable solutions tailored to residential and commercial properties. Our services include full replacements, sympathetic restorations, and custom joinery, combining traditional techniques with modern innovation.

John Hunter Glazing provides expert commercial and domestic glazing services in Belfast, including emergency repairs, installations, and bespoke projects. With 50 years of experience and Glass and Glazing Federation accreditation, we deliver high-quality solutions for windows, doors, and glass structures. Our commitment to excellence extends to 24/7 emergency services and tailored glass treatments for privacy and energy efficiency.

Belfast Sash Windows provides specialist repair, restoration, and installation services for timber sash windows. We combine traditional craftsmanship with modern thermal insulation techniques to enhance energy efficiency and security. Our team delivers tailored solutions for heritage and contemporary properties across Belfast, the UK, and Ireland.