4x4 Timber

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We can supply Rough Sawn and Redwood 4x4 timber posts, for local and national delivery.

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Frequently Asked Questions

What size is 4x4 timber in mm?

A 4x4 timber is typically a sawn piece of lumber measuring approximately 100mm x 100mm: this size can vary slightly depending on the type of wood, but it is considered a standard size for many applications. UK manufacturers and retailers must use metric measurements to sell their products. 4x4 is the imperial sizing, but 100mm (roughly 101.6 mm) is the required UK metric measurement. 

What are the common uses of 4x4 timber?

4x4 timber is versatile and has a variety of applications, such as:

  • Structural Support: 4x4 wood can become structural support for your construction projects via building frames, roofs, and decks.

  • Fencing: Create sturdy and durable fence posts and rails with 4x4 timber. The wood must be treated with specific chemicals to protect against soil and water.

  • Garden and Landscaping: Construct garden beds, raised flower beds, retaining walls, and steps with 4x4 timber.

  • Decorative: 4x4 wood can be used for decorative pieces like posts, beams, and mantels.

  • DIY Projects: Utilise 4x4 timber in your DIY projects, like shelving, bookcases, and storage units.

How much does a 4x4 post weigh? 

The weight of 4x4 timber posts can vary according to the moisture content and length of the post. Typical 4x4 timber posts that are 2.4 metres (8 feet) long would weigh approximately 13.2 kilograms (29.3 pounds). However, it's vital to note that the weight can vary, and it's always best to consult the supplier or manufacturer for specific weight information.

How deep should 4x4 posts be?

How far you should set your 4x4 into the ground can change according to soil type, your area's climate and the height and width of your 4x4 wooden posts. Generally, you should set 4x4 timber posts at a depth equal to 1/3 to 1/2 of the above-ground height.

How far apart should 4x4 fence posts be?

The distance between 4x4 fence posts will depend on several factors, including the type and height of the fence and the weight of the materials. Space 4x4 wooden posts approximately 2.4 metres (8 feet) apart as a general guideline. 

How long will a 4x4 post last in the ground?

The lifespan of a 4x4 post in the ground is variable and is highly dependent on the type of wood, its treatment, the soil conditions, and the area's climate. 

In general, untreated 4x4 posts made from softwood such as pine or spruce will last approximately 3 to 7 years in the ground before they begin to rot and decay. However, pressure-treated 4x4 posts can last significantly longer. Pressure-treated timber is coated with preservatives to protect against rot, decay, and insect damage, extending the lifespan of the wood. 

The specific lifespan of pressure-treated 4x4 wooden posts will depend on the treatment process and local conditions, but they can last between 20-25 years or more. However, even pressure-treated wood will eventually decay and should be inspected periodically for signs of rot or damage. You can extend the lifespan of your 4x4 wooden posts by installing them correctly. Set the posts to the appropriate depth and use suitable backfill materials for additional support.