Plastering concrete walls by " spraying "

Preparation

surface To begin with prepared surface - cleaned of dirt and dust, bitumen and grease.Always carried felling projections walls and concrete stains, as well as in the finishing of concrete sagging Usenkov and husks.If you place the speakers or the surface of the drops are too large, the base is required to be covered by a metal mesh.

Commonly used metal mesh "rod" or woven wire mesh.Anyway, it is attached to the tension on the dowel and tie wire.In this mesh cell must be not more than 10x10 mm dimeter and each rod should be about 6 - 10 mm.

Materials and tools

Like any building process, the plaster on the concrete by using specific tools and materials.The main instruments include: the right level, wooden slats, screws and a mixture of plaster, which may have a different composition.For example, often used lime-cement or polymer-plasticized mixture.

These or other formulations can be based on synthetic or based on the dry mixture.Typically, they are added organic plasticizers which are intended to improve the mobility of the solution.In areas with humidity up to 60% use two types of plaster: lime (done when the plaster walls and partitions) and lime with Portland cement or other cementitious components (when done exterior finishing of concrete walls and ceilings).

plaster concrete walls

A solution for plaster walls by prescription, indicated on the packaging.applying the solution method is the same as for finishing the brick walls (method «splash» ).The only difference is that you need to flatten sprayed on the concrete surface.The thickness of the plaster layer in this case must not be greater than 5 mm.However, just before the procedure is performed a number of other works.

As mentioned above, if the surface is uneven, then tighten the metal mesh.If the walls are smooth, then start to mount the rack, the distance between which should be no more than 1 meter.They are designed to divide the wall into sections, and simplify the process of plastering walls.Next, the wall is moistened with water (wet plaster) or lightly moistened (for synthetic).Then proceed directly to the "spraying".

Apply the solution is at the corners, and then move to the section.Regulation is carried out on the rails in the direction from top to bottom at the same time remove the excess solution.If somewhere on the contrary the solution is not enough, then it is added.So do all the sections of the wall.After the composition should cure and harden.Carefully remove the rack.Remaining after the rails fill the grooves and plaster solution.At the final stage is floating and smoothing.

Note! addition to finishing concrete walls with plaster for leveling the base, is also «decorative plaster under the concrete." And it is fundamentally different from the first.Its main function - no alignment of the walls, and the creation of decorative surfaces, simulating the texture and color of concrete.Such formulations are often used to create a "techno" design or decoration of the porch, basement, outbuildings.Plaster for concrete has different properties and performance.So be careful when buying and do not confuse it with a basic plaster mixture.