Raised deck with glass balustrade, dark cladding and lit steps overlooking the South Wales valleys

Create Your Perfect Outdoor Space

Millboard decking and Swish fascias, soffits and guttering, installed by a family-run Cardiff team with over 35 years of experience.

What We Offer

Alternative Decking

Premium, wood-free Millboard decking installations: durable, low-maintenance and built to last.

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Fascias & Guttering

Expert installation of UPVC fascias, soffits, guttering and cladding, available in classic white and a range of colours.

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Additional Services

We also fit glass balustrades and outdoor sound systems, and carry out fascia and guttering repairs and cleaning.

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Our Story

The Baldwin Brothers

Deck Plas, originally known as "Baldwin & Sons", is a family-run business founded in Cardiff by our late father, Leonard Baldwin, over 35 years ago. As brothers, we have continued to grow the company, and our goal is to offer high-quality decking and fascia & guttering installations in and around South Wales.

35+
years of family experience
Up to 25-year
Millboard material guarantee*
Up to 20-year
Swish white PVC guarantee*
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We Install Millboard Decking

  • Anti-slip for safety and durability
  • Low maintenance, keeping your deck looking pristine
  • Stain-resistant for lasting beauty
  • Rot and warp-resistant for long-term performance
  • Comes with up to a 25-year material guarantee*
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Millboard

We Install Swish Fascias & Guttering

  • Weather-resistant, built to withstand the elements
  • Keeps its colour with no discolouration over time
  • Recycled production for a more sustainable choice
  • Backed by up to a 20-year guarantee* on white PVC
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Swish Building Products

Testimonials

What our customers say about Deck Plas on Google.

Lee and his brothers replaced the decking to the rear of our property with no fuss and total professionalism, they were a pleasure to have in your home and to work with. Nothing was too much trouble, and the deck looks great.

Paul G.View review by Paul G. on Google (opens in a new tab)

Lee and his brothers were excellent. Lee spent quality time finalising plans for our garden layout with us. The finish is just stunning. Millboard is not cheap but when you see the end result....that saying " you only get what you paid for " is so true. Would recommend DeckPlas to anybody. First class product, first class company

David C.View review by David C. on Google (opens in a new tab)

I’m absolutely delighted with my new composite decking. It looks and feels so luxurious, and the craftsmanship is genuinely amazing. What really impressed me was the way the team worked around several very mature trees in the garden. Rather than treating them as an obstacle, they’ve been beautifully incorporated into the design and have almost become a focal point in their own right. I had a good idea of what I wanted, but the team really listened, understood the vision, and brought it to life even better than I imagined. They also helped me keep my green fingers! The sunken planters within the decking are such a lovely feature, and I’ve been able to plant bamboo, which now creates a beautiful effect with the lighting from the planters and across the tree canopy. The three gentlemen who completed the work were absolutely outstanding. Their professionalism, attention to detail and work ethic were second to none — particularly as they were working through extreme heat. I couldn’t be happier with the end result and would highly recommend them.

Jen S.View review by Jen S. on Google (opens in a new tab)

Contact Form

We are based in Cardiff and work mainly in and around South Wales. We are happy to travel further, so get in touch to see if we can help. You can also call us on 07380 801370 or 07971 549292.