Treatment of screed not connected with the substrate

Treatment of screed not connected with the substrate

The base for the screed should be clean, dry and even. We put an insulating layer on it. If there is a risk of damp from below, an additional layer of bitumen or foil should be placed under the insulation. The insulating layer is covered with another insulating layer made of polyethylene foil (ON) or from oil paper, which is to prevent the penetration of moisture from the screed into the insulation layer and damage it. The foil against the wall can be pulled up a few centimeters, and after the screed has hardened, cut it off. A tight strip of insulating material is placed along the walls, which does not have to be the same, like the material of the insulating layer. So that the strip of insulating material does not slide over the edge, it can be attached to it with one concrete screed cake. Now we can lay screed concrete. A template is needed to obtain a level and even floor with an even thickness, along which we strip the surface. One solution is to lay wooden strips of the desired thickness of the screed layer along the walls. The upper edge of these slats will serve as a plane for drawing together with a long wooden board. Another option is to create screed concrete templates along the walls. These templates are carefully wiped and smoothed with a screed board and checked for correct height. The level is checked by means of a straight long board and a spirit level. A long spirit level is also ideal for screed processing 2 meters. Fill the space between the templates with concrete. Use a long board to trim it along the patterns. When the entire surface is flattened evenly and horizontally, Rub the surface of the screed with a wooden trowel until water appears on it. As a result, the screed is compacted, and its surface is smoothed. Finally, rub the surface with a metal trowel, thanks to which it becomes completely smooth and is already suitable for laying a floor covering. If then tiles are to be laid, preliminary work is no longer necessary. The screed must first harden well, before it is put under a load. While setting the cement, the room should not be heated and should be protected against drafts. Cross the room if necessary, after a week, the walking boards can be placed on the screed. The screed can only be loaded normally after a hardening period of more than 3 weeks. After that time, if it is possible to work in this room again, Use a sharp knife to cut off the protruding separating foil and a strip of insulating material at the edge of the wall.