Trowel Ready Mortar
Northstone Mortar produces a range of quality plain and coloured mortars for the Northern Ireland construction market. Catering for major local building projects to domestic DIY and everything in between, our mortar is delivered to site in quantities to suit the customer's requirements. Northstone produce the following mortar products:
- Building mortar for brick and block laying
- Plastering mortar for internal and external applications
- Full range of coloured mortars.
Northstone Mortar is delivered in tubs and is ready for immediate use without any further treatment on site. With no set-up or breakdown costs and minimal wastage, this system 
offers the contractor significant economic advantages over site-mixed mortar.
In keeping with the Northstone Group's dedication to quality across its product range, our mortar is produced in modern computer controlled weigh-batching plants to ensure consistency and long term durability.
All raw materials used comply with the relevant British Standard and our mortars are produced to meet the requirements set out in BS4721. Table 4 from this Standard which outlines mortar designations and associated strengths is shown below:
| Mortar Designation | Cement Sand with Plasticiser | Compressive Strength |
| I | 1 : 3 | 11.0 |
| II | 1 : 3 to 4 | 4.5 |
| III | 1 : 5 to 6 | 2.5 |
| IV | 1 : 7 to 8 | 1.0 |
Table 4 :BS4721
The mortars normally supplied for brick and blockwork are Designation II for use in 
substructure work, (i.e. below DPC) or Designation III for superstructure work. Plastering mortar is generally Designation III.
Northstone Mortar is designed to hold its required cohesive and workability properties for a set retardation period as delivered in the tubs. In use, it starts to set as it loses water into the brick or block-work. The most widely used retardation period is 36 hours, but mortar can be supplied with longer or shorter periods as required.
Trowel-ready mortar is available from Dunmurry, which covers the Greater Belfast, Mid and South Antrim as well as North Down areas. Our Craigavon plant supplies County Armagh and South and Mid Down through to South Tyrone. North Antrim and County L'Derry is serviced from our Coleraine Plant.
Tipper Screed is also available from all three plants.
Depot | Telephone |
| Dunmurry | 028 9055 1353 |
| Craigavon | 028 3833 3133 |
| Coleraine | 028 7034 3973 |
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Colour Mortar
As well as natural grey, Northstone produces a range of coloured mortars to complement the specifer's choice of block or brick. The colours used are based on synthetic iron... » more
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Plaster / Render
Northstone's plastering mixes are manufactured with a specially blended plastering grade sand which provides both strength and ease of application. » more
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Tipper Screed
Northstone offer Tipper Screed from three locations Coleraine, Dunmurry and Craigavon. Manufactured in modern wet batched production facilities, providing the floor screeder... » more
