I bought a house built in the 1930s in Canada, and I'm using this video as a reference to fix the stairs from squeaking.
As seen in the pictures I'll attach, there's a third piece of wood that seems to join the X Y wood planes. I'm wondering how I should go about drilling the screw in, given this extra piece of wood?
I appreciate your help. Its a miracle I could afford any house, so I'm trying to make this place as livable as possible. Cheers m8s