A cavity wall comprising a first wall leaf, a second wall leaf, a wall cavity arranged between the first wall leaf and the second wall leaf of the cavity wall and a wall tie connecting the first wall leaf and the second wall leaf, wherein the wall tie comprises a first fixation system fixing the wall tie to the first wall leaf, wherein the first fixation system comprises; - an elongated first installation element arranged inside the first wall leaf, so as to install the wall tie to the first wall leaf by fixing the first fixation system relative to the first wall leaf, - an elongated first cavity element fixed to the first installation element and extending from the first installation element towards the second wall leaf and terminating at a first location beyond an inner major wall surface of the first wall leaf facing the wall cavity, - a retainer part for retention of one or more cables and/or pipes inside the wall cavity, wherein the retainer part is arranged inside the wall cavity and fixed to the first cavity element, and wherein the retainer part comprises a hook arrangement having one or more hooks retaining the one or more cables and/or pipes; wherein the wall tie further comprises a second fixation system for fixing the wall tie to the second wall leaf, wherein the second fixation system comprises: - a second installation element configured to be arranged inside the second wall leaf so as to install the wall tie to the second wall leaf by fixing the second fixation system relative to the second wall leaf, and - a second cavity element fixed to the second installation element and configured to extend from the second installation element towards the first wall leaf and to terminate at a second location beyond the inner major surface of the second wall leaf facing a wall cavity arranged between the first wall leaf and the second wall leaf of a wall, when the second fixation system is installed by the second installation element; wherein the second fixation system is an elongated part, with the second installation element at a first end and the second cavity element at a second end of the elongated second fixation system, characterized in that at least a longitudinal section of the second fixation system is made of a material beinp of lower thermal conductivity than the material of the first fixation system. - an elongated first installation element arranged inside the first wall leaf, so as to install the wall tie to the first wall leaf by fixing the first fixation system relative to the first wall leaf, - an elongated first cavity element fixed to the first installation element and extending from the first installation element towards the second wall leaf and terminating at a first location beyond an inner major wall surface of the first wall leaf facing the wall cavity, - a retainer part for retention of one or more cables and/or pipes inside the wall cavity, wherein the retainer part is arranged inside the wall cavity and fixed to the first cavity element, and wherein the retainer part comprises a hook arrangement having one or more hooks retaining the one or more cables and/or pipes; wherein the wall tie further comprises a second fixation system for fixing the wall tie to the second wall leaf, wherein the second fixation system comprises: - a second installation element configured to be arranged inside the second wall leaf so as to install the wall tie to the second wall leaf by fixing the second fixation system relative to the second wall leaf, and - a second cavity element fixed to the second installation element and configured to extend from the second installation element towards the first wall leaf and to terminate at a second location beyond the inner major surface of the second wall leaf facing a wall cavity arranged between the first wall leaf and the second wall leaf of a wall, when the second fixation system is installed by the second installation element; - a second installation element configured to be arranged inside the second wall leaf so as to install the wall tie to the second wall leaf by fixing the second fixation system relative to the second wall leaf, and - a second cavity element fixed to the second installation element and configured to extend from the second installation element towards the first wall leaf and to terminate at a second location beyond the inner major surface of the second wall leaf facing a wall cavity arranged between the first wall leaf and the second wall leaf of a wall, when the second fixation system is installed by the second installation element; wherein the second fixation system is an elongated part, with the second installation element at a first end and the second cavity element at a second end of the elongated second fixation system, characterized in that at least a longitudinal section of the second fixation system is made of a material beinp of lower thermal conductivity than the material of the first fixation system.