Deck Builders in Cardiff
Cardiff Joiners are deck builders in Cardiff, constructing timber, composite, and hardwood decks across Pontcanna, Cyncoed, Roath, Penylan, Canton, Heath, Penarth, and the wider area.
We handle the full build from foundations to finished surface, including balustrades, steps, and any associated garden joinery.
- Structural subframe design and installation
- Pressure-treated softwood, hardwood, composite, and PVC deck boards
- Steps and level changes for sloping Cardiff gardens
- Glass or timber balustrades for raised decks
- Integrated seating, planters, and pergola preparation
Call 029 2010 1446 to arrange a free site visit.
Why Choose Cardiff Joiners for Your Deck
Subframe-First Design
Every subframe is constructed for the ground type, drainage, and load specific to your garden.
Climate Expertise
We select materials to match Cardiff’s mild, wet climate with south-westerly exposure.
Full Scope Coordination
Design, foundations, balustrades, steps, and garden joinery all planned as one project.
Fixed Pricing
Detailed written quotation. No surprises. Maintenance guidance included at handover.
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Deck Design Options for Cardiff Properties
Full-Width Rear Extension Decks
The most common brief in Cardiff’s period terraces. A deck flush with the kitchen-diner floor level, running the full width of the property, creates a seamless indoor-to-outdoor transition.
We coordinate deck installation with rear door fitting when both are part of the same project.
Multi-Level Decks for Sloping Gardens
Larger detached properties in Cyncoed and Penylan often have rear gardens that slope down. A multi-level deck with steps creates a usable, level outdoor space that works with the gradient.
Deck and Balustrade Installations
Where a deck is raised more than 300mm, a balustrade is required for safety. We install timber post-and-rail and glass panel systems. Glass balustrades are popular in Cyncoed and Penarth.
Wraparound Decks for Bay-Fronted Semis
Bay-fronted Roath semis often have a side access and rear garden that can be connected with a wraparound deck. We design around the existing structure rather than compromising it.
Decking Materials for Cardiff’s Climate
Cardiff’s climate is mild, wet, and with regular wind from the south-west. The right material choice determines how long the deck lasts.
Pressure-Treated Softwood
The most popular choice by volume. Treated to resist rot and insect damage. Affordable and straightforward to work with. Typical service life with annual treatment is 15–20 years.
Hardwood Decking
Typically iroko, ipe, or bangkirai. Costs more upfront but requires minimal maintenance and lasts 25–30 years. Denser and heavier, requiring a more robust subframe.
Composite Decking
Made from recycled wood fibre and plastic. No staining or sealing required. Maintains its appearance over 20–25 years with minimal maintenance.
Thermowood
Timber heat-treated to reduce moisture absorption. Dimensionally more stable than untreated softwood. Popular in Canton and Pontcanna where period gardens suit a natural material palette.
Deck Building Costs in Cardiff
Cardiff Joiners provides written, fixed-price quotations for all deck building work. Call 029 2010 1446 for a precise quote.
Softwood Deck
Full-width terrace garden (3–4m x 4–5m, steps and balustrade if required). Typically £4,500–£8,000.
Composite or Hardwood Deck
Same footprint. Composite typically £6,500–£11,000. Hardwood typically £7,000–£12,000.
Multi-Level Deck
Level changes and steps. Typically £8,000–£16,000. Glass balustrade addition £350–£550 per linear metre.
Larger decks bring the per-square-metre price down. Budget a 10% contingency for groundwork.
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Our Deck Building Process
1. Free Site Visit
We visit, assess the garden, discuss your brief, and talk through material options and budget.
2. Design and Quote
Detailed written quote with materials specified. Structural drawings for raised decks requiring balustrades.
3. Installation
Foundations dug and concrete pads installed. Subframe constructed level and true. Boards fitted with correct spacing.
4. Handover
Final inspection, snagging resolved, and maintenance guidance provided.
Deck Builders Across Cardiff
We build decks across Cardiff and the surrounding areas.
Cardiff Joiners builds decks and handles all associated garden joinery. For bi-fold or sliding doors connecting the interior to the deck, see our door fitters page. For fencing alongside the new deck, see our fencing page. For the rear extension that the deck connects to, see house extensions.
Deck Building FAQs
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