Masonry materials
Type S vs Type N Mortar: Which One Should You Use?
Type S and Type N mortar have different strength and workability profiles. The correct selection depends on the masonry unit, wall location, exposure, structural design, and local requirements—not on choosing the strongest product by default.
Updated 2026-10-10
Quick comparison
| Factor | Option A | Option B |
|---|---|---|
| Strength profile | Moderate strength with good workability for many general uses | Higher strength and often selected for more demanding conditions |
| Typical location | Above-grade walls and general masonry where specified | Some below-grade, retaining, or higher-load applications when designed |
| Flexibility | Can be more forgiving for compatible general masonry | Higher strength is not automatically better for every older or softer unit |
| Selection | Follow the masonry design and unit compatibility | Follow the masonry design, exposure, and required strength |
| Quantity | Depends on joint size, unit size, and wall area | Depends on joint size, unit size, and wall area |
Option A is best for
Many above-grade applications where a balanced, workable mortar is specified.
Option B is best for
Applications needing higher compressive strength, such as some below-grade or higher-load masonry conditions when specified.
Match mortar to the masonry unit
Mortar must be compatible with the brick or block. A stronger mortar is not automatically safer; a mismatch can contribute to cracking, damage, or difficult future repairs. For historic masonry, preservation guidance and a qualified professional are especially important.
Confirm the required mortar type, joint profile, exposure, and curing conditions before ordering. Product bags and local terminology can vary, so read the technical data rather than relying on a color or brand name.
Estimate mortar from wall geometry
Mortar quantity is affected by wall area, unit dimensions, joint thickness, openings, and workmanship. A brick wall with small units and more joints generally uses more mortar than a wall with large blocks covering the same area.
Use the Brick Wall Calculator for an initial estimate, then add an allowance for waste and verify the result against the unit manufacturer or supplier guidance. The calculator does not select a structural masonry design.
Control weather and curing conditions
Cold, hot, windy, or rainy conditions can change masonry workability and curing. Protect fresh work and follow the product instructions for mixing, placement, tooling, and cleaning.
Before comparing bag prices, include delivery, sand if required, mixer or tools, labor, scaffolding, and site protection. The lowest material price may not be the lowest installed cost.
Ready to estimate your project?
Use the related calculator to estimate quantities and plan a material order. Verify final specifications and site requirements before purchasing.
Open the Brick Wall CalculatorFrequently asked questions
Is Type S mortar stronger than Type N?
Type S is generally the higher-strength option, but the correct type depends on the masonry unit, location, design, and exposure. Stronger is not automatically better for every wall.
Can I use Type S mortar for any brick wall?
Do not select mortar by strength alone. Confirm compatibility with the brick, block, design, local code, and any preservation requirements.
Does the Brick Wall Calculator choose the mortar type?
No. It estimates wall-related quantities. Mortar selection should come from the project requirements, product data, local code, or a qualified masonry professional.