Prep works

Prep works

1.1. Surface examination.

Primarily, the project surfaces are subject to examination, to see if there are any reasons for painting and to estimate the necessary prep works.

Surfaces should not be painted if the following is in place:

А). Efflorescence, frost;

B). Damaged plaster (loosely adherent particles, layer separation, cracks);

C). No rainwater disposal;

D). Biological deterioration (fungus, dry-rot fungus, mildew);

E). Wet surfaces;

F). Other.

First, the above should be removed and prevented in future.

 

1.2. Surface preparation.

Once the surfaces are examined, come up with the following:

А). Works to complete;

Removal of efflorescence and rust, degreasing of surfaces, filling with putty, priming, removal of old coatings from painted substrates, and painting itself.

Rust on steel surfaces can be removed with Kompozit® Rust Modifier.

Surfaces can be degreased with Kompozit® Solvent.

Old coatings can be removed with Kompozit® Paint Remover.

B). Materials to be required;

Putty, primer, paint.

Before applying any coating materials, surfaces have to be prepared.

Smooth the surfaces, plaster the existing cracks and apply a priming coat.

First, the surface is primed for the initial putty; it is recommended to apply acrylic putty for coating materials. Then, a layer of initial putty is again primed for the finish putty layer. After the finish layer is polished, remove the dust (vacuum clean or wash with a wet tissue) and again apply a priming coat. Only after the surface is primed for coating materials, start the coating material works.

Priming is needed to improve the adhesion of paint and surface, to reinforce substrates, to smooth the surface color and remove/prevent the dust.

For heavily absorbing surfaces, primers are not diluted. If required, dilution is allowed subject to primer application instructions.

Surface

Dilution

Weak plaster or plaster with loosely adherent particles, porous concrete

No dilution

Strong plaster

20-30%

Concrete surface

25-35%

Plasterboards

30-40%

To measure the degree of priming, try it on a small surface area. Primers are applied using a wet-on-wet method – 2-3 applications as each absorbed, while every prior layer applied is still wet.

Once the primer is dried, the surface can be painted after 6 hours.

After the surface is treated like this, no gloss should arise. If it does arise (glazing), polish the surface until it is matt.

C). Surface size;

Measure the surface areas considering their properties: bends, niches and other shapes, as well as the surface materials:

Concrete, plaster, wood, steel coatings – they are all specific about painting, since there are no all-around coating materials applicable to any and all substrates at a time.

D). Types and quantities of required materials;

Mind that glossy coating materials can accentuate the surface defects (like irregularities etc.), while matt coating materials hide them. It is especially seen on walls and ceilings with sidelight.

As you measure the surface areas, you can then estimate the quantity of materials required.

To make your estimations more accurate, use a calculator at Kompozit.ua  

Sample calculator estimation

http://kompozit.ua/kraski/kraska-inter-ernaja-interior-3.html?options=cart

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1.3. Requirements to work with coating materials.

Works with coating materials should not be started in dusty premises, in a draught, in direct sunlight, or in outside moisture.

Most appropriate conditions: the temperature of coating materials, air and surfaces should vary between +50C and +350C; air humidity under 80%; humidity of masonry surfaces subject for painting under 8%. Humidity is measured with a contact moisture meter. Should you have none, make a condensation test with a polyethylene film bonded to the surface. There should not be any condensation under the film.

1.4. Essential tools to work with coating materials.

А). Working tools to prepare the surface for painting and putty application – steel spatulas.

B). Working tools to prime surfaces – brushes, rollers, sprayers.

C). Working tools for painting – brushes, rollers, sprayers.

For solvent-borne paints, brushes and rollers with natural pile are required.

For water-borne paints, brushes and rollers with synthetic pile are required.

When using sprayers, mind the sprayer nozzle diameter – you may find the required size in the paint specifications.

D). To decorate coating materials, you may use brushes, rollers, spatulas – normal and texture, sponges, depending on your expectations.

E). Working tools require proper treatment.

If you worked with solvent-borne coating materials, wash the working tools with Kompozit® Solvent.

If you worked with water-borne coating materials, wash the working tools with water.

If you cannot wash the working tools immediately after work, wrap them with polyethylene to slow the drying of the material fragments left on the tools.

 

1.5. Treatment of painted surfaces.

The treatment instructions for painted surfaces are provided in paint specifications.

It should be noted that after drying, coating materials need time (about 1 month) to reach their critical solidity and durability. If the surface needs cleaning before this time, make for dry cleaning or clean it with a slightly wet tissue.

Do not use abrasive and chlorine detergents to clean the surfaces covered with coating materials.