Abstract: Method for erecting walls, in particular exterior walls, of a building, by means of form elements with insulating inlays. The interior of the form blocks or of form elements is thereby divided in the longitudinal direction of the walls into two regions by a layer of heat-insulating material. A layer of readily heat-conducting material is inserted in the region towards the exterior surface of the wall and a layer of heat-retaining material is inserted in the region towards the interior of the wall. A pipe is disposed in the layer of heat-retaining material for conducting a carrier medium for selectively heating and cooling. Another pipe may be placed in the layer of heat-conducting material.