One of the best roof material
Among the many other chemical elements of the Mendeleev table, we remembered no more than twenty from the school bench. But faced with the practical use of roof installation, they remembered two very important and unique metal from the above table. This is zinc and copper. These metals in the table under numbers 30 and 29, respectively. If we make the same table of irreplaceable metals to perform roofing work, then we think that zinc would be mentioned at number “1”, and copper under the number “2”. It may be like a joke, but in real life these two metal, like a find for those who know a lot about roofing materials and the installation of a roof.