Since 1978 · South Wales
Purveyors of
Building Materials
Serving trade & retail customers across South Wales with quality timber, aggregates and building supplies — stocked, priced, and ready when you are.
Featured Categories
From foundations to finishes — everything you need under one roof.
Built On Trust.
Delivered With Care.
We're a family-run builders merchant that's been part of South Wales for over four decades. Whether you're a builder running a site or a homeowner tackling a weekend project, you'll get the same straight-up advice and competitive pricing.
About UsFamily Run Since 1978
Over four decades supplying South Wales with quality materials and honest advice.
Trade & Retail Pricing
Sharp trade rates for the professionals, friendly prices for DIY and self-build.
Local Delivery
Fast, reliable delivery across Cardiff and the wider South Wales region.
Quality You Can Trust
We only stock brands and products that we'd happily use on our own jobs.
On Your Site, On Time
Trusted By Tradespeople
"Been using M&R for years. Honest pricing, great team and they always go out their way to help. Wouldn't go anywhere else."
"Sorted my whole extension — timber, blocks, insulation, the lot. Delivered on time and the lads on the yard are brilliant."
"Best builders merchant in South Wales for service. Phone up, order placed, on site next morning."
Step Inside Our Yard
Real photos from our Cardiff store — fully stocked aisles ready for trade and retail customers.
Opening Hours
Mon – Fri: 7:30 – 17:00
Saturday: 8:00 – 12:00
Sunday: Closed
Get In Touch
Phone: +44 2920 238107
WhatsApp: +44 2920 238107
Email: sales@mandrcaerdydd.com
Email: mandrcaerdydd@email.com
Questions? We've Got Answers.
Can’t find what you’re looking for? Drop us a line and we’ll get back to you quickly.
Yes, we offer fast local delivery across Cardiff and South Wales. You can also order online and collect from our yard if that suits you better.
Yes, order online and collect from our yard. Pay online in advance or in person when you collect, whichever works best for you.
Yes, we work with both trade and retail customers, and trade accounts are available on request.
Monday to Friday 7:30am – 5:00pm, Saturday 8:00am – 12:00pm, and closed on Sundays.
Yes, we welcome both trade professionals and members of the public, everyone is welcome in store.