Understanding the Differences Between Type N and Type S Mortar

So you’ve decided to tackle that bricklaying or stone construction project you’ve been dreaming about. Now it’s time to choose the right mortar to hold it all together. The two most common mortar types are Type N and Type S, but how do you know which is the best choice for your specific needs?  This decision can seem complicated, but don’t worry – we’re here to walk you through the key factors to consider so you end up with mortar that’s strong, durable, and helps your project look as stunning as the vision in your head. Whether you’re building a backyard BBQ, repairing an historic home, or anything in between, the right mortar for the job depends on the type of masonry units, exposure conditions, and the level of flexibility and durability you need. Read on to discover the pros and cons of Type N vs Type S mortar so you can choose wisely and get building with confidence.

When to Use Type N vs Type S Mortar

When choosing mortar for your masonry project, you’ll need to decide between type N and type S mortar. The main difference comes down to strength and flexibility.

Type N mortar is most common for general masonry work. It offers a good balance of strength and flexibility, allowing for slight movement in the masonry. If you’re doing a typical brick or block wall, sidewalk, or planter, type N is a solid choice. 

Higher Strength

Type S mortar provides higher strength and durability. It’s a good option if you need mortar for structural elements like foundations or high-stress areas. The increased strength means less flexibility though, so it can be more prone to cracking. Type S is often used in commercial construction. 

Another factor to weigh is the weather exposure and climate. Type S mortar may be better suited for extremely hot or wet areas where you need maximum strength and weather resistance. Type N can work for most normal weather conditions.

In the end, for most basic DIY and home renovation projects, type N mortar should suit your needs just fine. But if you have any doubts or need a mortar for heavy-duty, high-stress or commercial use, check with your local building department for recommendations. The most important thing is choosing a mortar that will stand the test of time and suit the demands of your specific project.

Tips for Choosing the Right Mortar Type for Your Project

When choosing mortar for your masonry project, you’ll need to determine whether Type N or Type S mortar is right for the job.

Type N mortar is ideal for general purpose masonry construction where high flexibility and bond strength are not major concerns. It typically contains lime, portland cement, sand, and water. The large amount of lime gives Type N mortar a high degree of workability and plasticity, making it easy to spread and tool. However, it also results in lower bond strength.

Type S mortar, on the other hand, contains a lower lime content and a higher cement content than Type N. This produces higher bond strength and durability. Use Type S mortar for load-bearing walls or any area that requires high strength and low absorption. The higher cement content does make Type S mortar stiffer to work with, so you’ll need a heavier trowel and more time to properly spread and level it. 

In summary, choose Type N mortar if you want a highly workable, flexible mortar for general purpose masonry construction where high bond strength is not critical. Opt for Type S mortar if you need a durable, high-strength mortar for load-bearing walls or in areas where low absorption is important. 

The type of mortar you select can impact the structural integrity and longevity of your project, so consider how it will be used and choose wisely. When in doubt, check with your local building department for recommendations and building code requirements in your area. The few extra minutes it takes to choose the proper mortar can save you time, money, and headaches down the road.