parquet preparation

[joe.t]

Hi, am about to lay reclaimed mosaic parquet blocks and would appreciate some advice.I'm laying them onto a concrete floor with vinyl tiles on top, which are soundly fixed.
Firstly, can i glue them straight on top of the tiles or do i need to screed or lay a plywood base onto the tiles.
Secondly the blocks have some bitumen on ,does this have to be removed. I have been told this can be left as long as its not thick and isn't lose.
thanks Joe

 

[mattysupra]

uplift the tiles. If concrete use levelling compound. If its wooden subfloor then plywood over it. And you should really remove any old glue from the blocks.

 

[joe.t]

Cheers, so do the vinyl tiles definately have to go ?
Do i need a expansion gap? Joe