Yellow Balau (Bangkirai) Deck Kits

From £0.00 £0.00

Create a beautiful and practical outdoor living space quickly and easily with one of our superb Yellow Balau (Bangkirai) Deck Kits.

Over the years our deck kits have proved extremely popular with landscapers, garden designers and do-it-yourselfers alike. They are easy to build, contain all the essential components, and can easily be expanded and/or personalised with railing and trellis.  

Yellow Balau (pronounced Bal-Ow) - Bangkirai - is a very durable hardwood and one of the most popular species in the UK for hardwood decking. It's a hard, heavy and strong timber that is well suited to deck construction.

With a mixture of warm colours of golden browns, light browns and pale reddish-brown, Yellow Balau offers a unique colour range which will sit beautifully within a natural environment.

Wastage Allowance
Please ensure when ordering that you make an allowance for wastage. We recommend adding an additional 10-15% over and above your initial requirements.

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A wastage allowance of 10% is built-in for your convenience.

At a Glance

  • Size: 21 x 145mm.
  • Grade: Standard & Better.
  • Profile: Yellow Balau deck boards have bevelled edges.
  • Surface texture: Smooth.

Kit Contents

Our standard deck kit contains everything you need to build a ground level deck over an existing solid base such as a patio (does not need to be level), or if no base exists, it can be built over a series of paving stones placed on solid ground.  

Standard deck kits include: ·

Deck boards - 21 x 145mm Yellow Balau Deck Boards.

Deck joists – 45 x 95mm C24 stress graded pressure treated softwood.

Decking screws - 5.0 x 60mm Countersunk Stainless Steel Screws.

Structural screws – 5.0 x 100mm Countersunk Stainless Steel Screws.

EasyFix™ 38mm joist supports.

Please note: Deck Kits do not include fascia boards. We're aware customers may only require one end of their deck to be covered by fascia, or may require all 4 sides to be covered. Please consider this when choosing your Deck Kit, if fascias are required please click here to choose the suitable length and add to your order.

Assembly of our deck kits is relatively simple and only a few basic tools are required. Joists are screwed together to form the frame which sits in the Easyfix rubber joist supports. The frame is then levelled using rubber shims before the deck boards are screwed down - it really is that simple!  

Key Properties

  • Appearance: Produced predominantly from the heartwood, Yellow Balau can vary in colour from reddish-brown to a more olive or darker blackish brown. It has an interlocking grain, fine uniform texture and a surface that is almost entirely free of knots and other natural defects. Occasional pinhole and hit and miss is acceptable within the grading rules of Yellow Balau decking.
  • Durability: Yellow Balau has a natural resistance to moisture, decay and insect damage. With a proven life expectancy of 50+ years (when correctly maintained), it has a Durability Class 2 (BS EN 350-2) (durable) rating and is known to be one of the toughest and most durable hardwoods on earth.
  • Stability:  Wood is a hygroscopic organic material that takes up and releases moisture according to the temperature and the relative humidity of the ambient air. As wood releases moisture it will shrink (usually during summer) and as it absorbs moisture (in the winter months) it will expand. The rate of expansion and contraction will vary according to the grain orientation of the wood. This means that some pieces will expand or contract more than others, so there may be minor variances in the width of the boards (known as tangential shrinkage). Shrinkage in the thickness (radial) is minimal and length (longitudinal) virtually non-existent.
  • Density & Hardness: Yellow Balau is the hardest of all commercially available hardwood species; in fact, it’s one of the hardest woods on Earth. It has a Janka scale rating of 3510 lb/in2 (3 times harder than Oak) and weighs in at 960 - 12000 kg/m3 when dry. As a result, it’s highly resistant to impact and abrasion.
  • Grading: Silva's Yellow Balau decking is Standard & Better grade which has excellent characteristics. Its appearance is almost entirely free of knots.
  • Sourcing: Silva's Yellow Balau decking is manufactured in Indonesia from the highest quality wood fibre. Rather than buying on an 'ad-hoc' basis from different suppliers with varying quality standards, we have been buying from a single reputable source for several years to ensure quality and consistency.

Optional Extras

  • Finishes: Even though Yellow Balau is highly durable in its natural state we recommend that Yellow Balau decking be finished on all four sides prior to installation to help prevent surface checking, discolouration and cupping. Choose from a wide range of Sansin Dec paint and stain products.
  • Factory coating service: Can be supplied factory coated, enabling it to be installed at any time of year, regardless of the weather or temperature. Please Contact Us for a quotation.


Up to 7 working days*.


£45.00 / £95.00 / £145 / POA depending on location.

Free delivery is offered on orders over £2,000 + VAT**.

You can view our detailed delivery charges and services here.

Please note: As with most building supplies, delivery is to the kerbside only.

Scheduled Collection


3-5 working days.



* Please allow up to 14 days for delivery especially at peak times.

** Exclusions apply.