MPA Mortar part of the Mineral Products Association (MPA)

mpa mortar

quality factory-produced
mortar since 1971



Which mortar?

There are two main types of factory-produced mortar – ready-to- use, delivered to site in a wet or dry state and lime:sand, a blend of sand and lime to which water is added on site.

Ready-to-use mortars

Ready-to-use mortars are made in factories under tightly controlled conditions and delivered to site, ready to use. They have guaranteed mix proportions and overcome any potential problems relating to site mixing.

Wet ready-to-use mortars

Wet ready-to-use mortars are stored in tubs on site and require no further mixing. They incorporate a retarding agent which makes them fully useable for a specific period, usually some 36 hours.

For further information on wet ready-to-use mortar see MPA Mortar data sheet 2.

Dry ready-to-use mortars

Dry ready-to-use mortars are stored in silos or bags. Silos are delivered to site complete with integral mixers and require only power and water supplies to be connected.

For further information on dry silo mortar see MPA Mortar data sheet 3.


Lime:sand mortars are a blend of sand and lime to which cement and water is added on site to produce a masonry mortar.

These mortars are well known for their plasticity and workability. The fact that they can completely fill vertical as well as horizontal joints helps in achieving good workmanship. The mortar also spreads easily under the trowel, so increasing productivity and minimising wastage.

For further information on lime:sand mortar see MPA Mortar data sheet 1.

Factory-produced mortars

Factory-produced mortars are especially valuable to specific groups of end users. Click on the relevant area of your interest for further information: house builders, ground workers and general builders, self-build.

MPA Mortar data sheets

No. 1 Limes and mortar

No. 2 Wet ready-to-use mortar

No. 3 Dry silo mortar

No. 9 Technical references for mortar and associated topics

No. 19 New mortar standards

No. 23 Specification of an appropriate mortar issue

MPA Mortar Briefing sheet

CE marking and the UK mortar and screed industry

MPA Mortar learning text

Part 1 Introduction to mortar

Part 6 Properties of masonry mortar

Part 7 Production, delivery and storage of mortar

Part 8 Mortar testing

Part 9 Specifications

Part 10 Quality assurance

Part 13 Best practice potential site problems

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