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Placing polystyrene composite panels on frame: when I screw the plasterboard on the cleats the polystyrene compresses: result I can not push the head of the screw correctly because the polystyrene is the effect of a spring. How to do?

Composite panels of this type are not made to be screwed on a frame, especially in wood, but to be stuck vertically on a wall with a regular surface (see our sheet "ISOLER A WALL WITH DOUBLAGES DOUGLAGES"
Taken between the plasterboard and the rafter, the polystyrene can only be compressed by the tightening... Or you have to take very long screws (at least 30 mm longer than the thickness of your doubling) so that it is not necessary to screw them beyond this dimension to ensure sufficient anchoring of the insulating complex.

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