During a particularly broke period I moved into a '50's wood frame house,
built on cinderblock foundation, roaches could come up thru the foundation into the house.
I woke up in bed, 2am, big ol' La Cucaracha fell off the ceiling on my face.
I tried setting off those roach bombs with the house all closed up.
Roaches flip, kick, squirm, hide in the walls, die....and LAY THEIR EGG CASES!
30 days later you've got roaches all over again.
I finally got rid of them with those little cardboard box contraptions,
about 3" square with fly paper glue on the inside.
I spread those all around and checked them every week.
At first they were filthy full of dead roaches stuck to the glue,
but at least when they died they didn't lay any eggs.
It took about 2 months but I finally got them all cleared out.