INNOVATIVE
RESEARCH & DEVELOPMENT
Technical excellence is at the heart of what we do at Larsen, thanks to our in-house Research & Development team.
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MANUFACTURED IN BELFAST
We’ve operated as a family-owned business for over 5 decades in Belfast’s thriving docklands, distributing products to our loyal customers across NI, ROI & GB.
OUR PRODUCTS
CASE STUDIES
Discover how Larsen Building Products is being used throughout high-profile projects across Ireland & the United Kingdom
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About Us

Founded in 1975 in Antrim, Northern Ireland, Larsen has grown from humble beginnings of supplying admixtures to concrete plants into a powerhouse offering a diverse range of high-quality, high-performance products across multiple sectors throughout the UK and Ireland.

About Us

Founded in 1975 in Antrim, Northern Ireland, Larsen has grown from humble beginnings of supplying admixtures to concrete plants into a powerhouse offering a diverse range of high-quality, high-performance products across multiple sectors throughout the UK and Ireland.

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About Us

Larsen Building Products has been setting the standard in professional building solutions since 1975. From our roots in Antrim, Northern Ireland, as a family-owned business, we’ve grown into a cutting-edge buildings products manufacturer, delivering quality solutions to the diverse needs of the construction market.

What started as a company supplying Admixtures to concrete plants, now has an extensive full product catalogue for industries such as Tiling, Flooring, Streetscape, Mortar and much more.

High quality products engineered to achieve professional results every time

The go-to building products supplier for NI, ROI & GB customers since 1975

Supporting our customers with technical advice andguidance every step of the way

From first contact, through to delivery – we always put our customer care at the forefront of operations

We pride ourselves on working with local suppliers and businesses in our community

Built For Professionals

High quality products engineered to achieve
professional results every time

Trusted Reputation

The go-to building products supplier for NI, ROI &
GB customers since 1975

Technical Experts

Supporting our customers with technical advice and
guidance every step of the way

Customer First

From first contact, through to delivery – we always put
our customer care at the forefront of operations

Support Local

We pride ourselves on working with local
suppliers and businesses in our community

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Fibreflex™ Semi-Rapid Set+

Granite paving at Lewisham Gateway in the heart of Lewisham, London, was installed using Larsen’s BS 7533 Eco Streetscape Paving Mortar System; including Priming Slurry, Fine Bedding Concrete & Flowable Jointing Mortar Smooth.

Granite paving at Lewisham Gateway in the heart of Lewisham, London, was installed using Larsen’s BS 7533 Eco Streetscape Paving Mortar System; including Priming Slurry, Fine Bedding Concrete & Flowable Jointing Mortar Smooth.

Same product, fresh new look

Same product, fresh new look

Search our full range below

Fine Bedding Concrete Std (Bulk): tonnes required

Fine Bedding Concrete Std (25kg): bags required

Flowable Jointing Mortar (25kg): bags required

Gun Pointing Mortar (20kg): bags required

Priming Slurry (20kg): bags required

Brush Joint 360 (15kg): tubs required

Brush Joint 360 (15kg): tubs required

Flowable Jointing Mortar (25kg): bags required

Gun Pointing Mortar (20kg): bags required

Tile Grout: kg required