An energy-conserving building covering material includes a building panel, such as a roofing panel or siding panel, coated with a thermomorphic material that can change its energy reflectance. The thermomorphic coating material can be combined with a carrier material., or it can be encapsulated with a solvent and optionally a color former in a microcapsule suspended in the carrier material. Alternatively, the building panel can include an electrophoretic material sandwiched between two transparent panels acting as electrodes. The building panel, when covered with said coating material and carrier material combination, can reflect radiant energy during warmer temperatures and can absorb radiant energy during cooler temperatures and re-radiate said absorbed energy into an interior of a building.