Can I mix type N mortar mix and type M mortar mix or does this have any adverse effects?

There is no specific purpose, I want to use up remainders.


1 Answer 1


The fundamental difference is in the proportion of portland cement. Type M has a higher amount, and is therefore better suited for below-grade and high-strength applications. Type N is appropriate for lighter duty.

If you don't need to meet the requirements of foundation walls, for example, go ahead and mix it up.

More information

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.