Our Aggretages for London
Topsoil is defined by the top 2-7 inches of soil that has the greatest organic matter content and microorganisms. Organic matter is what is left after plant roots, leaves and stems decompose. Topsoil is made up of carbon and nitrogen, microbes larger creatures such as worms, beetles and other insects. A fertile topsoil also has concentrations of nutrients including potassium, iron and phosphorous.
The quality of topsoil varies depending on geographic region and climate, along with human activity. Generally, the blacker the topsoil, the richer its nutrients – the advantage to this is that nutritive topsoil is able to hold onto more water. Furthermore, this allows the topsoil to be more productive in terms of yielding plant growth.
The most important factor behind topsoil is it provides nutrients to growing plants, this is because this region of soil does the main biological nutrient cycling, providing the required carbon and nitrogen molecules for plants to grow. Topsoil is a highly required aggregate for landscaping, in terms of planting lawns and gardens and is popular amongst those building new homes and gardeners who wish to maximize the potential of their plants.
Crushed concrete is an aggregate composed of clean crushed concrete and brick. The size of this aggregate varies from 75mm down to 40mm.
Sharp sand is typically made from ground rocks and is sometimes referred to as builders sand as its ideal for laying blocks, paving and patios.
Ballast refers to a mixture of sand and gravel that is used to make concrete. Generally, the size of the grains/stones vary from 0.1mm upwards to 20mm.
There are two different types of gravel which are 10mm and 20mm. 10mm gravel, also known as ‘pea gravel’ is primarily used for decorative purposes and drainage.
Topsoil is defined by the top 2-7 inches of soil that has the greatest organic content. Organic matter is what is left after plant roots and leaves.
Building Sand is a finer grade than sharp sand with smaller particles. It’s often mixed with water and cement to make mortar for laying bricks, patio slabs and blocks.
MOT Type 1 is a sub base that is formed using recycled crushed concrete and consists of rubble of varying size. It compacts well to form a solid base which makes it an ideal sub-base.
This sand is used to fill the joints of block paving and paving slabs. By filling the joints with paving sand you keep the structure of the paving rigid and strong.