If waterproofing is applied, should, of course, must be done before re-filling. There are various methods that are used, depending largely on local conditions. While applying the coating to the walls, it is better to put it out.
Water thus prevented from entering the wall, and the water pressure tends to force the layer in tight contact. If the examination of water required for the bathroom, probably around a bathtub or other toiletry, this technique is a bit more complex.
This may consist of a layer of half-inch of Portland cement mortar (mixed in the proportion of 1 sack of Portland cement to 2 cubic feet of clean, sand graded, plus material is finely divided, such as hydrated lime or silica diatoms), or plastic cement is applied to the interior surface wall with a shovel to get waterproofing wall.
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For bathroom remodelling, walls that surround the Steam or steam must be completely scraped and cleaned with a sharp-edged instrument and a wire brush and then moistened before mortar is applied.
The best way is to cover the surface with a layer of bituminous if the condition is worse than the existing moisture. This may consist of a simple layer of coal-tar pitch or asphalt, or may be built-up that includes alternate layers of bituminous materials and tar paper.