Abstract: A five-layer window shade fabric 100 especially useful in forming a Roman shade which will substantially increase the insulating factor (R) for a glass windowpane has a moisture-, light-, and mildew-resistant exterior layer 10; an insulation layer 12 adjacent the exterior layer; a vapor barrier 14 adjacent the insulation layer to reduce condensation and to trap a layer of air between the barrier and the window; a reflective sheet adjacent the barrier to reflect heat back into the room; and an interior cover fabric 18 adjacent the reflective sheet and chosen to complement the room decor.