The performance of traditional mortars, plasters, and paints depends fundamentally on the quality and grading of their aggregates. At Rose of Jericho, we offer specialist sieving and grading services to process sands, stone dusts, and fine aggregates to precise and consistent specifications.

Using controlled mechanical sieving, we separate materials into defined particle size ranges, allowing us to replicate historic aggregate profiles or tailor blends for specific applications. This is particularly important in conservation work, where the texture, colour, and performance of a mortar or plaster must closely match existing fabric. Even subtle variations in grading can significantly influence workability, permeability, strength, and visual finish.

Our services support a wide range of requirements—from preparing fine stone dusts for lime mortars and plasters, to grading sands for renders, pointing, and specialist decorative finishes. We can work with client-supplied materials or source and process aggregates to meet project-specific needs.

For historic buildings, careful grading helps ensure compatibility with traditional substrates, promoting breathability and reducing the risk of failure. It also allows for accurate matching of existing mortars in repair work, ensuring a cohesive and visually appropriate result.

By combining technical control with a deep understanding of traditional materials, Rose of Jericho delivers aggregates that are not only consistent and reliable, but also appropriate to the character and performance of historic construction.

Rose of Jericho provides specialist crushing services to reduce stone and aggregate from sizes of up to approximately 50mm down to smaller, usable grades for traditional building materials.

Using controlled crushing processes, we produce consistent and reliable aggregates suitable for lime mortars, plasters, renders, and specialist finishes. This service is particularly valuable where existing site materials can be reprocessed and reused—helping to match local geology, colour, and character while reducing waste and transport costs.

Crushed materials can be further refined through our sieving and grading services to achieve precise particle size distributions, ensuring optimal performance in application. This is especially important in conservation work, where aggregate size and shape directly influence permeability, strength, and visual appearance.

By combining crushing with grading and material expertise, Rose of Jericho offers a fully integrated approach—turning raw or reclaimed stone into high-quality aggregates suited to both new work and the repair of historic fabric.