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We are a supplier of choice for high quality aggregate materials for an array of applications including road construction and surfacing, sea and river defences, water filtration and surface water solutions (suds).


The stone from our quarries is sought after due to its high density and low drying shrinkage, making it perfect for producing a wide range of aggregates for use in coated stone, concrete, blocks and general building materials.


The majority of our aggregate materials are mainly produced at our quarry in Troon with the exception of sand and gravel which comes from our Garpel Quarry near Muirkirk.


Our highly experienced team are on hand to help everyone form contractors to construction firms choose the right aggregate products.


Find out more about our aggregate materials – crushed rock, sand and gravel, recycled aggregates, fill materials and armour stone, and washed aggregates – below.

We produce and stock a full range of single sized crushed rock products for industrial and domestic uses, including for drainage and concrete, ranging from fines to 40mm. We can guide you in choosing the perfect products to meet your project requirements.

Our Garpel Quarry near Muirkirk supplies a full range of washed sand and gravel aggregate products. Washed sand is available in various grades depending on its intended use and our single sized gravel aggregate is available in a range of sizes.

If you have specialist product requirements orders can be placed in advance by contacting the Sales Department directly on 01292 318338

We offer recycled crusher run (or hardcore) and sub-base to order in accordance with the WRAP (Waste & Resources Action Programme) protocol, encouraging greater use of recycled aggregate materials. A full range of asphalt mixes are also available with recycled asphalt from our Glasgow, Troon and Fife asphalt plants.

We supply a full range of structural and bulk fill materials, including all Class 6 materials and crusher runs.


With unparalleled capacity in Ayrshire, we have several fill materials we typically keep in stock and can product fill materials to order to meet specific requirements.

Hillhouse Group’s versatile washed aggregate has a range of uses including drainage and pipe bedding. It is also a product of choice for mixing concrete or for aesthetic purposes for gardens and driveways.