What are Eco-bricks?

Wiki commons - Ecobricks

Eco-bricks are clean, dry plastic bottles of any size that are packed full of other non-recyclable plastics, i.e. crisp wrappers, plastic bags, Styrofoam or cellophane to a set density. When completely full they can be used as a sturdy building material, either on their own or within concrete.

They are used in other countries to build homes, walls and furniture; and have been used in Scotland for smaller community projects like benches or garden planters.

These must consist of only non-recyclable materials and not include glass, metals, paper or organic material i.e. food waste. It is vitally important that nothing inside the bottle begins to decompose, which creates gas, causing them to bulge or burst over time. As a result, contaminated bottles cannot be used in building and will go to landfill.

How can you get involved?

Eco-bricks are made by packing a clean, dry plastic bottle with non-recyclable plastics such as plastic bag, packets or packaging, Styrofoam or cellophane. The plastics must be pushed into the bottle and packed down until it reaches a weight of approximate 0.3g per ml.

Do Don't
Use a wooden spoon or drum stick to pack material down Don't use anything that could decompose over time
Fill all large gaps or air spaces inside Don't use sports cap bottles
Use clean and dry materials Don't use damaged bottles

Milk cartons are very difficult to clean correctly, and since the start of the project several have developed mould or started to smell. As a result, we cannot accept any more milk carton eco-bricks.

Due to the huge response to this campaign, we cannot accept any more incomplete eco-bricks.

Complete eco-bricks should fit to the description in the check list, and follow the guide weights below:

The bottles should be packed to a weight of 0.3g per litre, as shown below:

Bottle Volume Target Weight
330ml 110g
500ml 167g
1000ml 330-333g
1500ml 500g
2000ml 666g

Where can they be dropped off?

We are been collecting Eco-bricks through South Ayrshire Council’s local libraries.

We also have a number of incomplete eco-bricks that have been donated. In order to prevent these going to landfill, you can ‘adopt an eco-brick’!

Adopt an Ecobrick

Sometimes the eco-bricks we collect are not quite finished to the level where we can use them for building. To prevent these going to landfill, we would like your help to ensure we make the best out of our resources.

A box of partially completed bricks will be available at each collection point for you to take away a partially finished brick and continue diverting waste from landfill.

Staff at the collection points will have finished examples to show you the weight and size bricks should be. If your brick is incomplete, it cannot be accepted by the collection points.

When should they be completed by?

This phase of eco-brick collections will run until the end of 2019.

After this point, we will not be collecting any more eco-bricks, but we will continue to build with the bricks that we have at that point.

The build projects currently identified are:

Community Garden

Community garden projects underway within the Library service are looking at integrating eco-bricks into garden features. This includes building planters and other garden furniture.

Park Feature

An eco-brick installation in a public space like Rozelle or Belleisle is in development. In a similar way to the community garden features, this will be a permanent feature to showcase the work done by you as well as removing plastic waste from landfill.

Art Installation

We are aiming to work with local artists and Rozelle House to develop an art installation to highlight plastic waste and the importance of individual effort in solving this global challenge.

These projects are in development and updates will be posted through this page and via social media. We are working to ensure these projects will be permanent structures that last, to prevent these waste plastics ending up in landfill.

More information available at