How long does it take to install a composite decking terrace? Timescale, schedule and stages of the work.

How long does it take to install a terrace made from composite decking boards?

On average, installing a composite decking board terrace with an area of around 20–25 m² takes 2 to 4 working days.
But please note — this is only a general estimate. The exact schedule depends, among other things, on:

• ground preparation,
• the complexity of the project (e.g. steps, balustrades),
• the type of composite decking boards used,
• the installation team’s experience,
• weather conditions.

Pro tip: If you’re planning a larger terrace (e.g. 40–50 m²), allow 4–6 days of work.

Composite decking installation schedule – step by step.

Here is a typical step-by-step schedule for installing a terrace made from composite decking boards:

Day 1: Measuring and preparing the ground.

• marking out the terrace area,
• measuring the levels,
• levelling the ground if necessary,
• preparing the sub-base (e.g. gravel, foundation slabs, concrete blocks).

Duration: 4–8 hours (depending on conditions)

Day 2: Installing the joists (supporting structure).

• laying the aluminium or composite joists,
• levelling and fixing them to the ground, 
• allowing for the appropriate expansion gaps.

Duration: 4–6 hours

Day 3: Laying the composite decking boards.

• installing the boards using fixing clips,
• cutting the boards to the required length,
• checking the level and spacing,
• installing the boards along the edges.

Duration: 6–10 hours (depending on the area)

Day 4: Finishing touches and appearance. 

• installing cover strips,
• building steps or balustrades if required,
• final inspection and cleaning.

Duration: 2–5 hours

What affects the time it takes to install a terrace?

If you want to estimate how long the work will take more accurately, consider these factors:

1. The size of the terrace. 

The larger the area, the more cutting and fixing is required, and the more time the work takes.

2. The condition of the ground.

Does the ground need levelling? Do foundations need to be poured? Allow for extra hours, or even an extra day’s work.

3. The shape of the terrace. 

A simple rectangle, or perhaps an L-shaped design with steps? Every extra complication means more work. 

4. The weather. 

Composite decking boards are not suited to being installed in the rain — wet clips and boards can be slippery and make installation more difficult.

5. The team’s experience. 

A professional team will get the job done faster. Installing it yourself? It’s best to allow an extra 1–2 days, especially if you have no previous experience.

Can you install a terrace yourself?

Of course! Installing a terrace made from composite decking boards does not require complicated tools or special building skills. However, you do need to be patient and precise, and have a bit of a knack for practical work.

For installation, you will need, among other things:

• a cordless screwdriver,
• a spirit level,
• a tape measure and pencil,
• a saw (e.g. a mitre saw),
• fixing clips and screws.

For DIY enthusiasts, installation can take as long as 5–7 days (for a terrace of around 20–25 m²).

How can you speed up installation?

Want to save time and avoid stress? Here are a few tips:

• Order all the materials in advance – boards, joists, clips and cover strips.
• Check the weather forecast – it’s best to work in dry, calm weather.
• Prepare your tools in advance – this will help you avoid unnecessary delays.
• Don’t work alone – even one extra pair of hands will significantly speed up installation. 

Summary – How long does it take to install a terrace made from composite decking boards? 

The actual time needed to install a composite decking board terrace is:

• 2–4 days for an area of approx. 20–25 m² with an efficient team,
• 4–6 days for larger or more complex projects,
• 5–7 days for DIY installation.

Remember that the key to success is good preparation, the right tools and a well-thought-out schedule.