Tinned copper wire (TCW) has a layer of tin plating placed on its surface area which safeguards from corrosion. Tinned copper wire is coated in a thin layer of tin to avoid oxidation (the method by which oxygen attaches itself to metal). A single skin reliable wall is definitely recognized https://bookmarkspring.com/story12976591/5-tips-about-cavity-wall-ties-you-can-use-today