insulating plasterboard

foil-backed gypsum board, insulating plaster-board

Gypsum board having an aluminum foil on one of its surfaces providing a vapor-resistant membrane and increased resistance to heat flow.
References in periodicals archive ?
Insulating plasterboard, or thermal board as it is also called, is thicker than normal plasterboard as it incorporates a layer of polystyrene insulation.
Dry lining or adding sheets of insulating plasterboard is the best option for solid wall houses.