spec mix masonry mortar

SPEC MIX mortar strength varies by type. Type S, commonly used for structural masonry and concrete block, achieves a compressive strength of approximately 1,800 psi. Type M, used for below-grade structural applications, reaches around 2,500 psi. Type N, suitable for above-grade bricklaying, offers roughly 750 psi. Each type is engineered to meet ASTM C270 standards for predictable, consistent performance.

SPEC MIX mortar typically reaches initial set within 1–2 hours and achieves workable strength within 24–48 hours under normal temperature and humidity conditions. Full cure and design strength are generally reached within 28 days. Cold or wet weather can slow curing; mortar accelerators are available through The Brickyard to help maintain performance in low-temperature conditions.

Mortar type selection depends on your application. Type O is recommended for tuck pointing and non-structural repairs. Type N is ideal for above-grade bricklaying on exterior walls. Type S is used for concrete block and structural masonry. Type M is specified for below-grade structural applications such as foundations. The Brickyard's staff can help you select the correct type for your specific project requirements.

Yes, The Brickyard offers local and statewide delivery throughout Milwaukee and Southeastern Wisconsin, with rates that vary by location. Whether you need a small quantity for a residential repair or bulk supply for a large commercial project, delivery options are available. Contact our team at (414) 481-9600 to arrange delivery and confirm current availability.

Standard SPEC MIX mortar types are suitable for chimney construction above the roofline. However, for firebox interiors and areas exposed to direct flame, a refractory mortar such as HeatStop II — also available at The Brickyard — is required. Our staff can advise on the correct mortar for each zone of a chimney or fireplace installation.

In addition to SPEC MIX, The Brickyard stocks a comprehensive range of masonry accessories including Quikrete concrete, grout, wall ties, weeps, drip edge from Hohmann & Barnard, cleaners and sealers from SEK and Techniseal, bulk mason sand, and specialty tools from Probst. This makes it a one-stop source for complete masonry and hardscaping project supply needs.