Profile: Hill House Quarry Group Ltd. is a manufacturer of building materials. Our products include drystone, coated stone, ready mix concrete, surfacing, concrete blocks and precast concrete. Drystone is ideal for The high density and low drying shrinkage of the stone make it ideal for producing the aggregates for use in coated stone, concrete, blocks and general building materials. Coated materials are computer controlled to ensure batching accuracy and compliance with schemes. Ready mix concrete is used on prestigious projects undertaken in the area including the trunk road, Bow house prison, prestwick airport, Irvine & kilmarnock retail parks and town center sewage scheme.