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Premium Concrete Masonry Products in Belfast
Concrete Northern Ireland NI, part of the RTU Group, has been manufacturing high-quality masonry products for over 130 years. Established in 1888 following the discovery of limestone deposits in Colinwell, the company has evolved from traditional kiln operations to a modern leader in concrete product innovation. Our expertise spans architectural masonry, acoustic solutions, and retaining wall systems, serving construction projects across the UK and Ireland. With headquarters in Belfast and sales offices in Leeds, Glasgow, and Dublin, we combine heritage with cutting-edge technology to deliver durable, sustainable products.

Our accreditations reflect our commitment to excellence, while our CPD seminars demonstrate industry leadership. From educational institutions to residential developments, our products have shaped iconic structures, supported by a dedicated workforce and a vision for responsible manufacturing practices.
Services
Architectural Masonry Acoustic Masonry Allan Block Retaining Walls Martello Stone Walling CPD Seminars
Highlights and features
  • We have over 130 years of expertise in concrete product manufacturing.
  • Our products combine heritage craftsmanship with modern technological innovation.
  • We supply projects nationwide with a focus on sustainability and quality.
  • Our CPD seminars provide technical insights into masonry solutions.
  • We maintain rigorous quality standards across all product lines.
Services
Architectural Masonry
Our architectural masonry blocks combine aesthetic appeal with structural integrity. Designed for commercial and residential buildings, these blocks offer versatility in design while meeting modern construction standards. The range includes textured finishes and custom colour options to suit diverse architectural styles.
Acoustic Masonry
Acoustic masonry blocks reduce noise pollution in urban environments. Ideal for schools, sports facilities, and transport hubs, these blocks incorporate sound-absorbing technology without compromising structural performance. Available in multiple finishes for seamless integration into building designs.
Allan Block Retaining Walls
Licensed Allan Block retaining wall systems provide durable slope stabilisation. Suitable for highways, housing developments, and landscaping projects, these interlocking blocks offer rapid installation and long-term durability. Available in various textures and colours for aesthetic flexibility.
Martello Stone Walling
Martello Stone Walling replicates traditional stone aesthetics with lightweight concrete. Perfect for faades and boundary walls, this system reduces construction time while maintaining visual authenticity. Offers weather resistance and design adaptability for modern building projects.
CPD Seminars
Our CPD seminars deliver expert insights into masonry applications. Covering retaining wall engineering, acoustic design principles, and architectural detailing, these sessions support architects and contractors. Includes practical demonstrations and technical specification guidance for optimal product use.
Questions
What products does Concrete Northern Ireland NI manufacture?
We produce architectural masonry blocks, acoustic sound-absorbing blocks, Allan Block retaining wall systems, and Martello Stone Walling.
Where does Concrete Northern Ireland NI operate?
We supply products across the UK and Ireland, with offices in Belfast, Leeds, Glasgow, and Dublin.
Can I request a free quote for products?
Yes, contact us via our website form or call 028 9061 8145 for a free quotation.
Does Colinwell offer technical training?
We provide CPD seminars on retaining wall systems, acoustic solutions, and architectural masonry design.
What industries use Colinwell's products?
Our products are used in education, commercial, residential, and infrastructure projects.