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 ?
Dry lining or adding sheets of insulating plasterboard is the best option for solid wall houses.
Insulating plasterboard, or thermal board as it is also called, is thicker than normal plasterboard as it incorporates a layer of polystyrene insulation.