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What to Do with Leftover Composite
Decking

  • July 22 2025
  • Allan Jeffrey
  • 15 mins read
Teak wood grain composite decking boards left side view
Teak wood grain composite decking boards left side view

Introduction

On completion of your decking area, you may have leftover boards. You may be wondering – “Can you use the leftover composite decking to build other garden features and additions?” – Absolutely!

If you have leftover decking boards, you can use them to make planters, benches, and many other features that will perfectly complement and match your new decking area.

Build a Matching Outdoor Storage Box

Constructing a storage box with composite decking is a perfect way to use leftover materials. You can use it to store all your gardening accessories, garden cushions, or even children’s garden toys.

  • It will Stand the Test of Time:

    Since composite decking is a very durable material; a storage box constructed with it is highly resistant to moisture, termites, and other weathering elements.

  • It’s Safe and Practical:

    Your new composite storage box will not splinter, making it the perfect place to keep your summer accessories for easy access.

Raised Deck With Underneath Storage Cupboards

Construct a Custom Planter Box

Building a planter box with leftover composite decking is another great idea – Not only will it be a great accessory feature that matches your new deck, but a planter box made with composite will also look modern and aesthetically pleasing.

Why composite boards should be used: –

 

  • Perfect for Planting:

    Composite planters will not rot over time like wood, due to their durability and resistance to moisture.

  • Safe for Edibles:

    Composite decking boards do not leach chemicals into the soil, making them safe to build planters and raised garden beds, for your vegetables and herbs.

wood grain grey decking with planter built with leftover decking

Build a Long-Lasting Pet House

As composite decking boards are safe for pets, leftover composite decking can be used to build a pet or bird house in the garden – It’s a perfect addition!

Why it’s a great build: –

  • Pet-safe

    It’s pet-safe and will stand the test of time against the UK weather

  • Rot-Resistant:

    It’s Rot-Resistant: Heavily resistant to moisture, you don’t have to worry about splintering, mould, or mildew issues with your new build.

Mixed colour Ipe Decking close up

Make a Weatherproof Garden Bench

Composite decking is resistant to water and moisture, making it the perfect material for a garden bench that can be left outside all year round.

 

Why Leftover Boards are Great for Benches: –

 

  • Strong

    They won’t warp, crack, or splinter like timber benches often do.

  • Rain-Resistant:

    Rain will not penetrate the material, meaning it won’t rot or decay over time; simply add waterproof cushions for a perfect, comfortable look.

Seating area in white with grey composite decking boards

Add a Stylish Garden Path

Apart from making a bench, you can use leftover composite decking to create a clean, modern and practical path through your garden.

A Great Addition with Added Benefits:

  • A path reduces the amount of grass in your garden, helping to limit annual maintenance.
  • It provides easy, mud-free access to any area in your garden, whatever the weather.

Create a Safe Raised Garden Bed

Do you have a love for gardening and have leftover composite decking to be used – Why not construct a durable, raised garden bed?

A true eco-friendly and safe solution:

  • Unlike pressure-treated wood, composite decking does not contain toxic, industrial chemicals and won’t risk leaching them into your soil.
  • You have the added benefit of ensuring your home-grown plants will be safe.
Mixed colour teak with black planter and tropical plants

Conclusion

As you can see, homeowners can use leftover composite decking for variety of purposes. You can use it to build a bench, pet house, garden bed, or storage box. This can be achieved with no more than your leftover boards, providing added longevity and safety, creating further enhancements and beautiful new features for your garden.

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