Exterior painting

Exterior painting

Before painting the surfaces, make for all prep works specified in para. 1. Prep works. Estimate the types and quantities of the required materials, clean the surface, remove old coatings from painted substrates, smooth the surface, plaster cracks and prime the surface.

Mix paints and enamels before you start the works. If you mix with a drill, use a low speed mode. If the speed is high, the paint gets gassy and loses its aesthetic value. Varnishes should wait for 15 minutes after mixing, to prevent air bubbles on the varnished surface.

In case of biological deterioration of masonry surfaces and regular outside moisture, treat the surfaces with Kompozit® Antiseptic Masonry Prep.

To protect wooden facades against biological deterioration, it is recommended to use Kompozit® W3 Water-Resistant Antiseptic.

In case of ground interaction, use Kompozit® W4 Antiseptic for Enhanced Protection.

If a wooden surface has changed its initial look (for example, discolored to grey), treat it with Kompozit® W1 Whitener for Wood.

3.1. Wooden facades, windows, doors.

Prepare the surface.

Do not paint frosty wood.

Painting cannot hide or remove the facade surface defects. Old coating and resin need to be removed.

After prep works, wooden facades can be painted.

Use brushes, rollers and sprayers to paint the wood.

Do not paint and varnish the wood when exposed to strong wind, dust, direct sunlight and high humidity. Treat the wooden exterior surfaces regularly affected by outdoor moisture with gloss-rich coating materials. Glossy coating is more weatherproof. Paints and varnishes need to be applied in 2-3 layers.

To paint doors and windows with no blocking risks, better use the coating materials with anti-blocking effect – for example, Kompozit® PROFI Acrylic Enamel.

Pay special attention to butts, as the wood shear perpendicular to the grain is heavily moisture-absorbing.

Paints and varnishes for wooden exterior surfaces:

Kompozit® Yacht Polyurethane Varnish

PROFI Acrylic Enamel

METALLIQ® Acrylic Enamel

Kompozit® Alkyd Snow-White Enamel

Kompozit® PF-115 Enamel.

 

3.2. Masonry exterior surfaces and basements.

The paints intended for masonry exterior surfaces are subject to severe requirements, as they should make the facade weatherproof and protect it against direct sunlight. At the same time, these paints should have a relatively porous structure to not prevent the humidity from going outside (vapor permeability). New concrete foundations should wait for at least 1 month before painting.

First, make for all prep works specified in para. 1. Prep works.

Plaster the cracks with the solution structurally similar to the painted surface. Prime the surface with Kompozit® UNIVERSAL Acrylic Primer or Kompozit® Brilliant Acrylic Primer. Use Kompozit® UNIVERSAL Acrylic Primer-Bio for the facades facing the north or regularly exposed to moisture. For plastering, use Kompozit® QUARTZ-GRUNT Adhesive Primer.

The works should be done at the temperature varying from +50C to +350C, with humidity under 80%. The works cannot be done when exposed to strong wind and direct sunlight.

For brick facades, it is recommended to use Kompozit® Facade Paint FACADE Latex, which is particular for its strong vapor permeability.

In basements and places exposed to heavy mechanical loads (construction joints like joints between panels), it is recommended to use Kompozit® ELASTOMER 15 Stone Elastomeric Plaster particular for its high elasticity.

Plaster for facades:

Name

Basement/ Construction joints

Façade

Indoor premises

Acryl Plast 15 Stone Plaster

+

+

Acryl Plast 20 Stone Plaster

+

+

ELASTOMER 15 Stone Elastomeric Plaster

+

+

+

STRUCTURE S130 (Structural/Textured) Paint

+

+

Coating materials for masonry exterior surfaces:

Kompozit® Facade Paint FACADE Latex

Kompozit® STRUCTURE S130 (Structural/Textured) Paint

Kompozit® Acryl Plast 15 Stone Plaster

Kompozit® Acryl Plast 20 Stone Plaster

Kompozit® ELASTOMER 15 Stone Elastomeric Plaster

Kompozit® STRONG Primer

Kompozit® AK-11 Paint for Concrete Flooring

3.3. Steel surfaces.

First, make for all prep works specified in para. 1. Prep works.

Remove dirt and rust with Kompozit® Rust Modifier and old coating with Kompozit® Paint Remover, and degrease the surface with Kompozit® Solvent.

For ferrous metal surfaces, it is recommended to apply the priming coat Kompozit® GF-021 Primer, Kompozit® EXPRESS Anticorrosive Primer or Kompozit® ANTIKOR Primer for Metal.

For surfaces of non-ferrous metal, stainless steel or galvanized metal, only Kompozit® ANTIKOR Primer for Metal is applicable. Before you paint the galvanized metal, take it outside for a couple of months, to stimulate the natural oxidation processes; then wash it with an alkaline solution; after that, you can apply a priming coat and paint the surface.

Paint with a roller, brush or sprayer.

Paints for steel surfaces:

Kompozit® Roof Paint

Kompozit® PF-115 Enamel

Kompozit® Alkyd Snow-White Enamel

Kompozit® 3 in 1 Anticorrosive Enamel (no prior priming required)

PROFI Acrylic Enamel

METALLIQ® Acrylic Enamel

AK-11 Paint for Concrete Flooring

3.4. Useful tips to work with coating materials

Surface preparation.

Poor surface preparation deteriorates the coating quality and affects adversely its look.

Requirements to work with coating materials.

Most appropriate conditions: the temperature of coating materials, air and surfaces should vary between +5C and +35C; air humidity under 80%; no strong wind and direct sunlight. A dry, cloudy day is the best time to work with coating materials. The freshly painted surface should not be affected by the morning dew, so finish all the works well in advance.

Working tools.

For protruding (relief) roofs, better use brushes, which will ensure smooth painting all over the surface.

For wooden surfaces, it is also better to use brushes, especially when working with butts (shears perpendicular to the grain).

To paint windows, use a masking tape, which you should remove before the paint is dry.

Use safety facilities to protect yourself.

Priming.

A required process aimed to enhance the adhesion of coating materials and the surface.

Tinting.

Allows selecting the necessary color. Mind that it is recommended to choose light colors for facades, because they are light-resistant and better harmonize with the environment.

Paint estimation.

You can estimate the paint quantity using a calculator at кompozit.ua

Working tool treatment.

Wash the working tools immediately after works, while the coating materials are still fresh. During breaks, wrap your rollers and brushes with polyethylene to prevent their drying.

3.5. Possible problems during works with coating materials.     

 

  1. Air bubbles in paint.

Reason:

Painting is done in hot weather or in direct sunlight.

Paint is gassy.

 

  1. Cracking and peel-off.

Reason:

The paint is diluted too much, or it was applied too thick.

Poor surface preparation – for example, the surface was not primed or was dusty.

High strength capacities of paint make the film more solid yet less elastic, which eventually may lead to cracking

Paint was applied in windy weather or in high humidity.

If the paint is being peeled off and changing its color, it was likely to be applied to wet plaster.

 

  1. Efflorescence.

Reason:

Poor surface preparation. Efflorescence was not removed before painting.

Exudation of moisture from the surface – damaged waterproofing capacities of filter elements.

Painting in wet weather.

 

  1. Mildew.

Reason:

Continuous façade moistening. No prep works.

 

  1. Paint wrinkling.

Reason:

Paint is applied too thick.

Painting is done at a too high temperature or in direct sunlight. The second paint layer is applied before the first one is dry. The upper paint layer is already dry, while the lower one is still wet.

The second paint layer is applied over the first one that is still wet.

 

  1. Visible joints and gloss difference (tint variance is observable).

Reason:

The same surface (visually inseparable) was painted with breaks.

Coating materials were all from different production lines, with no prior mixing.

Paint was applied unevenly.