Red Seal Bricklayer Practice Exam

The main distinction between Type S and Type N mortar lies in their composition, strength, and intended applications. Type S mortar is formulated to be stronger than Type N, making it suitable for load-bearing walls and areas that require greater structural integrity. This higher compressive strength allows it to support heavier loads and withstand higher pressures, which is essential in structural masonry applications.

On the other hand, Type N mortar has a lower strength compared to Type S and is primarily used for above-grade applications such as non-load-bearing walls, interior partitions, and veneer work. Its composition makes it more flexible and workable, providing sufficient strength for situations where huge loads are not a concern, such as in residential construction.

This understanding informs why Type S is recommended for structural purposes, while Type N serves more decorative and less load-bearing purposes. Therefore, the correct response accurately captures the critical differences in the strength and typical usage scenarios of these two types of mortar.