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Decking Joists

Creating the framework for your decking, deck joists are an essential part of any decking project. Selecting the correct joist is crucial to the longevity of your deck and Stewart Timber is here to help!


Our joists are made of durable, pressure treated timber that is sustainably sourced from FSC suppliers. We select pressure treated timber as it gives your joists a longer life, protecting it from harsh weather conditions, harmful pests and wood rot! 


Once your deck is complete we recommend treating it with deck oil to seal in all the natural oils to give it an added layer of protection! To complete the rest of your decking, we suggest exploring our boards, posts and panels.

  • 47mm x 200mm Deck Joist

    Exceed the lengths of support you thought were possible with these 47mm x 200mm deck joists. * These excellent quality joists come in a 4.8m..

  • 47mm x 150mm Deck Joist

    These 47mm x 150mm deck joists are designed to be a long lasting and durable support for your deck. * This hefty timber is available..

  • 47mm x 125mm Deck Joist

    These 47mm x 125mm deck joists are an excellent choice for supporting your deck. * Carcassing timber is the perfect material for constructing a sturdy..

  • 47mm x 100mm Deck Joist

    Versatile and durable, these 47mm x 100mm deck joists are an excellent option for supporting your decking. * Carcassing timber is the perfect material for..

  • 47mm x 75mm Timber Joist

    Our timber joists are made from excellent quality materials for maximum support and durability. * This robust carcassing timber is perfect for use as a..

  • 47mm x 50mm Timber Joist 3.6m

    These 3.6m joists are perfect as support for any timber construction project. * The 47mm x 50mm carcassing timber is perfect for use as a..

Where we deliver & delivery options

We offer delivery within 5 working days on most of our products if your order is placed before 11am, or you can Click and Collect after 4 hours.

Information about Decking Joists

I need a specific size that’s not on the website – can you do it? 

If you have bespoke sizing requirements, don’t hesitate to get in touch to enquire. 


Where do you deliver to? 

We deliver all of our products to Glasgow, Edinburgh and central Scotland. 


How much does delivery cost?

Delivery cost is calculated at checkout based on your location within a 30 mile radius of G67 2TU. If you are further afield, we offer nationwide delivery via Palletline – call us directly now for a quote. Collection from our Cumbernauld site is free. 


Why choose Stewart Timber? 

From our products to our services, Stewart Timber is Glasgow’s favourite, fastest growing timber supplier. Don’t just take our word for it, read our happy customer reviews!