Where is Type M masonry, known for high strength, typically used?

Type M masonry is recognized for its high compressive strength, which makes it particularly suitable for applications requiring strong load-bearing capabilities. This type of masonry is often employed in below-ground settings, such as in foundation walls, retaining walls, and other underground structures where the demands of soil pressure and moisture resistance are critical.

The mortar's strength helps withstand the stresses and strains placed on these structures by the earth and the weight of above-ground elements. Additionally, the impermeable nature of Type M masonry helps prevent water from penetrating, which is particularly important in below-ground applications where water can be an issue.

In contrast, while Type M can be used in above-ground structures and exterior walls, those applications do not fully utilize its superior strength characteristics as specifically as in below-ground contexts. Decorative work typically does not require the high strength provided by Type M, making it less appropriate for such applications.