Insulating gap between plasterboard and floor

[gambo]

What's the best way to insulate these gaps? We put insulated plasterboard on the walls so don't want to loose the whole benefit of the insulation through these gaps. This particular place will be covered with skirting but it's the same behind kitchen cabinets and no plan for skirting there at the moment (we used to have fridge-like temperature in winter in corner cabinet before renovation).

[saveasteading]

what is the floor construction?

[gambo]

It's open kitchen with concrete floor (late 80s house so none or every little insulation).

Tiles on one side and engineered floor (glued) on. the other.

Floor on the picture is temporary .

Edited 6 hours ago by gambo

[nod]

Fill it with airtight expanding foam (Blue)

Cut it off in line with the wall once dry 

Edited 3 hours ago by nod

[gambo]

1 hour ago, nod said:

Fill it with airtight expanding foam (Blue)

Cut it off in line with the wall once dry 

e.g illbruck? That was the plan but i wasn't sure if it will not let moisture/damp transfer up to the wall.

[nod]

1 hour ago, gambo said:

e.g illbruck? That was the plan but i wasn't sure if it will not let moisture/damp transfer up to the wall.

It’s fine we used to use it all the time on new housing sites That was when Air tests where actually carried out 😁