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Basic Mortar Information

Mortar Types, Strengths and Uses:

Type 'M' has a 2,500 psi compressive strength. Used for:

  • below grade
  • load bearing masonry work
  • chimneys
  • brick manholes

Type 'S' has a 1,800 psi compressive strength. Used for:

  • below grade
  • above grade
  • foundation walls
  • brick manholes
  • retaining walls
  • sewers
  • brick walkways
  • patios


Type 'N' has a 750 psi compressive strength. Used as:

  • general purpose mortar
  • above grade work (exterior and interior)
  • load bearing installations


Type 'O' has a 350 psi compressive strength. Used for:

  • tuckpointing


*The Type 'S' Spec Mix mortar is a good, general purpose mortar.  This type is used on nearly all of the commercial sites due to its versatility.

ABC AGC AIA E AWCI CSI International Concrete Repair Institute Iowa Roofing Contractors Association MBI MICA NSC IRMCA
Stetson Building Products, LLC
2205 Bell Avenue
Des Moines, IA 50321
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Stetson is dedicated to serving construction industry professionals throughout the Midwest by distributing a complete line of commercial building products and providing exceptional customer service. Our five divisions work with only top quality product lines and manufacturers who stand behind their products and offer technical assistance whenever needed.
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