Strong timber decking joists are essential for building a sturdy and durable deck. The most commonly used size, 4 x 2 inch or 100 x 44mm provides reliable support for your decking boards, ensuring a stable and long-lasting structure. These joists are pressure-treated to resist rot and decay, making them ideal for outdoor use. Designed to withstand the elements, our timber decking joists offer exceptional durability and longevity, making them a trusted choice for any decking project. Perfect for DIY enthusiasts and professionals alike, these joists are available for convenient collection or delivery in Dublin.
Build a deck that lasts with our high-quality timber joists!
What Timber Is Best To Use For Decking Supports?
Pressure-Treated Softwoods are typically used for outdoor decks due to their resistance to rot and insects.
What Size Support Joists Should I Use For My Deck?
The size of joists you should use for your timber deck depends on several factors, including the span (distance between supports), the spacing of the joists, and the load the deck will need to support.
In most cases a 4x2 inch or 100 x 44mm timber joist is ideal. If your deck will support heavy furniture, a hot tub, or large gatherings, a thicker 6x2 inch or 150 x 44mm joist would be suitable.
Should I use 4x2 or 6x2 joists for decking?
For most decks, a 4x2 inch (100 x 44mm) timber joist is typically sufficient. However, if your deck will need to support heavy weight, opting for a thicker 6x2 inch (150 x 44mm) joist is recommended for added strength and durability.
What Spacing Should I Leave Between My Deck Joists?
In most cases, 30 - 40cm is a suitable gap to leave between decking joists.
How Many Decking Joists Do I Need?
Here are some approximate quantities to help you determine how many timber boards you require.
10m2 Deck = x10 Lengths of 4.8m Joists
15m2 Deck = x14 Lengths of 4.8m Joists
20m2 Deck = x18 Lengths of 4.8m Joists
25m2 Deck = x22 Lengths of 4.8m Joists
30m2 Deck = x26 Lengths of 4.8m Joists
*Please note these are approximate measurements based on 30 - 40cm gap between joists. Actual quanities will vary depending on the shape of your deck and gaps allowed. Please allow extra boards for waste.
