Search

Which aggregate should I use?

Bethany Evans Posted this on 20 Mar 2024

We have a range of aggregates available that can be used across all applications including; pointing, plastering, rendering and screeding. We are continually working to improve the environmental credentials of our products, looking for more sustainable alternatives to freshly quarried sands which deplete a finite natural resource. By working with suppliers in the recycling sector, we are proud to say a number of our aggregates are now sourced from recycled building materials, the waste materials are processed, washed and then graded to ensure they meet the criteria required for Lime mortars.

The table below explains the aggregate size, colour and suitable application for each aggregate.

Aggregate Name

Aggregate Colour

Aggregate Size*

Suitable For **

Available in

Please note, pointing joints tend to be finer for brickwork, than stonework, so the smaller aggregates are normally advisable for brickwork.

Silica

Pale Yellow

<1mm

Internal Top Coat Plaster

25kg Small Bag

1 Tonne Bulk Bag

Fine Cumbrian

Buff

1mm

Top Coat Plaster

25kg Small Bag

1 Tonne Bulk Bag

Dark Blaenavon

Very Dark Grey/Black

2mm

Pointing - Brickwork

25kg Small Bag

1 Tonne Bulk Bag

Blaenavon

Dark Grey

2mm

Pointing - Brickwork

25kg Small Bag

1 Tonne Bulk Bag

Rhondda+

Grey

2mm

Pointing - Brickwork

Bagged Finish

25kg Small Bag

1 Tonne Bulk Bag

London

Yellow

2mm

Pointing - Brickwork

Top Coat Render

25kg Small Bag

1 Tonne Bulk Bag

Cumbrian

Buff

2mm

Pointing - Brickwork

Top Coat Render

25kg Small Bag

1 Tonne Bulk Bag

Red Sandstone

Red

4mm

Pointing - Brickwork

Pointing - Stonework

25kg Small Bag

1 Tonne Bulk Bag

Cheshire

Pale grey with dark grey fleck

4mm

Pointing - Stonework

25kg Small Bag

1 Tonne Bulk Bag

Caernarfon+

Pale grey with coarse grey fleck

4mm

Pointing - Stonework

25kg Small Bag

1 Tonne Bulk Bag

Shropshire

Pink

4mm

Pointing – Stonework

Base Coat Plaster/Render

25kg Small Bag

1 Tonne Bulk Bag

Cotswold

White with yellow fleck

4mm

Pointing – Stonework

Roughcast Render

1 Tonne Bulk Bag

Screeding Aggregate+

Pale grey with coarse grey fleck

4mm

Floor Slab/Screed

Bedding Flagstones

25kg Small Bag

1 Tonne Bulk Bag

Rice Coal

Black Fleck

4mm

Aesthetic addition to mortar

25kg Small Bag

Wold

White Fleck

8mm

Aesthetic addition to mortar

25kg Small Bag

* Largest aggregate size listed, all aggregates will go down to dust which generally is required to make a reasonable mortar/plaster.

** Suitable for, but not limited to the suggestions made in this table.

+ Recycled Aggregate