When davening two shemoneh essreis one-after-the-other (usually that would happen when davening a tefilas tashlumin), one should say “ashrei” between them. The exception to this would be if davening two shemoneh essreis by maariv (say because of missing minchah), when you would just pause between the 2 tefillos the amount of time it takes to walk about 6-8 feet, since the mekubalim discourage the saying of “ashrei” at night.
Shabbos Bulletin Parshas Re’eh and Tefilla Halacha
About the Author: Lev Seltzer
Lev Seltzer has been a member of Beis Tefillah from just a short time after its founding. He currently manages the BTYA.org website, and can be found every morning in the BTYA "Vasikin Room" where he is the gabbai of the minyon.