Revisions log for question
How to get rid of a creaky floor?

The wood floors are creaky and make me and the neighbors nervous. So far, I've opened up the floor in the alcove.There is basically nothing under the floor, just a slab. I measured the thickness with a ruler.

I'm thinking of putting extruded polystyrene foam on the slab and screed on top. Is this the right decision?

• floor