Mortar Types

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Michael Ermann

February 04, 2022 20:26

The mortar types from strongest (least workable) to weakest (most workable) are: Type M, Type S, Type N, Type O and Type K. To help remember this, think about MaSoN wOrK. Mortar should be weaker than the brick, so in renovation of old (weak) brick, use Type O mortar (K isn’t used anymore). Vee and concave mortar joints are acceptable for outdoors. Stripped, flush, weathered, extruded and struck hold puddles of water or are not sufficiently compacted. --Michael Ermann, Amber Book

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  Joseph Petrarca October 19, 2022 20:26

  Remember, there's mortar this than meets the eye.

  Int the field, it's a process of trowel and error.

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