In message , Glen
writes
I have various squeaky floorbaords (chipboard) in my house.

Is this an older house you live in? If so I would definately lift the boards
before screwing down. Providing the boards aren't T&G this is dead easy to
do.

As you quoted, the OP said:

'I have various squeaky floorboards (chipboard)'
^^^^^^^^^^^^^
--
Chris French, Leeds