Choosing the right mortar is essential for any masonry project, and many people often wonder whether to use Type N or Type S mortar. Types of mortar vary in strength and application, and selecting the wrong mix can affect durability and appearance. Amerimix pre-blended mortar offers consistent quality, solving common field-mixing issues. Masonry cement combined with Portland cement and lime creates reliable bonding for bricks and stones. Proper mortar compressive strength ensures walls and structures remain stable under load. Understanding these factors helps builders, DIY enthusiasts, and masons achieve long-lasting results while avoiding costly mistakes in construction or repair projects.
Type N or Type S Mortar – Quick Answer
Type N mortar is a medium-strength mortar with 750-psi compressive strength. It works best for exterior, above-grade brick or soft stone applications. Type S mortar, on the other hand, is stronger with 1,800-psi compressive strength and is ideal for load-bearing walls, patios, retaining walls, or masonry foundations. Both mortars can be purchased as pre-blended construction materials to save time and ensure consistency. Use a mortar calculator to estimate how much you need for your project.
The Origin of Type N or Type S Mortar
Mortars were classified into Type N, S, M, and O under standardized building codes to guide builders in selecting the correct mortar. Builders chose Type N mortar for non-structural work and decorative stone because of its mortar compressive strength and workability. Engineers developed Type S to meet the demands of structural and below-grade masonry that requires heavy-duty mortar able to withstand lateral loads and environmental stress. Using the right type improves masonry performance and longevity.
British English vs American English Spelling
Mortar terms like Type N and Type S are consistent in both British and American English. However, sometimes confusion arises with regional names or specifications.
| Term | British English | American English |
|---|---|---|
| Type N Mortar | Type N mortar | Type N mortar |
| Type S Mortar | Type S mortar | Type S mortar |
| Load-bearing mortar | Load-bearing mortar | Load-bearing mortar |
The technical terms remain unchanged, ensuring masonry foundation mortar and retaining wall mortar specifications are clear worldwide.
Which Spelling Should You Use?
Since Type N and Type S are standard codes, you should stick to the official spelling. In construction documents in the US, always write Type N or Type S. In UK/Commonwealth countries, these classifications are also used in professional masonry specifications. Using the official names ensures that contractors and suppliers understand the ideal applications for each mortar type.
Common Mistakes with Type N or Type S Mortar
A frequent mistake is using Type N mortar for below-grade or load-bearing walls where Type S is required. Another error is misjudging the effects of sand moisture on mortar mix, which can alter the mortar compressive strength. Field-mixed mortar may also suffer from inconsistencies, so many professionals recommend pre-blended mortar. Using the wrong mortar type can lead to cracking, reduced structural integrity, or costly repairs.
Type N or Type S Mortar in Everyday Examples
Type N mortar is ideal for creating ornamental stone facades, indoor fireplaces, and garden walls. For masonry foundations, patios, and retaining walls, type S mortar works best. Professional masons often prefer Amerimix pre-blended mortar to reduce mixing errors and ensure proper bonding. You might see these mortars mentioned in construction emails, project specifications, social media tutorials, or home improvement blogs, emphasizing their mortar mixing techniques and curing time for different mortar types.
Type N or Type S Mortar – Google Trends & Usage Data
Search trends show that “type N or type S mortar” is most popular in the US and Canada, where residential and commercial masonry projects are frequent. Interest peaks during spring and summer months when outdoor construction projects start. Online searches often include variations like “best mortar for soft stone or brick” or “masonry repair using Type O mortar,” highlighting the need for precise selection.
Comparison Table: Type N vs Type S Mortar
| Feature | Type N Mortar | Type S Mortar |
|---|---|---|
| Compressive Strength | 750 PSI | 1,800 PSI |
| Best for | Above-grade brick, soft stone | Load-bearing walls, patios, retaining walls |
| Workability | High | Medium |
| Drying Time | 28 days | 28 days |
| Common Use | Non-structural, decorative masonry | Structural, below-grade masonry |
| Pre-Blended Option | Yes | Yes |
FAQs
What is Type N mortar mix used for?
Type N mortar is used for above-grade brick, soft stone, and general-purpose, non-load-bearing masonry work.
What is the difference between N and S concrete?
Type N is medium-strength for above-grade work, while Type S is stronger and suitable for load-bearing or below-grade applications.
Can type S mortar be used for concrete?
Type S mortar is not designed as structural concrete but can be used for masonry applications needing high strength.
Can I use type S mortar for repointing?
Yes, Type S can be used for repointing stronger or load-bearing walls, but Type N is often preferred for softer, decorative masonry.
Is type N mortar better than type S?
Neither is “better”; Type N is for above-grade, non-structural work, and Type S is for structural and below-grade applications.
What is the best mortar mix for pointing?
Type N or Type O mortar is best for pointing, depending on wall strength and masonry type.
Can I put new mortar over old mortar?
Yes, old mortar can be removed and new mortar applied, ensuring proper adhesion and matching strength.
Conclusion
Choosing between Type N or Type S mortar depends on your project requirements and load-bearing needs. Type N mortar suits above-grade brick or soft stone work, while Type S is perfect for foundations, patios, and retaining walls. Always consider mortar strength comparison, curing time for different mortar types, and effects of sand moisture on mortar mix to ensure long-lasting masonry. Using pre-blended construction materials like Amerimix mortar helps prevent common mistakes, optimize construction durability, and simplify masonry repair. By understanding the ideal applications for each mortar type, both professionals and DIYers can achieve safe, strong, and visually appealing results.
