The painting of an outer wall

Do-it-yourselfers are taking over more and more work on their homes. For example, activities on the façade have long since been included, including the painting of an exterior wall. You will then receive detailed instructions for painting such an exterior wall.

The testing of the exterior wall is preceded by numerous tests

Exterior walls can be painted in the same way as conventional interior walls. However, the products are different and the investigations from the underground have to be done accurately. To determine the quality of the plaster, perform various tests.

  • visual inspection
  • tap test
  • wicking
  • scratch test
  • wipe test

The visual inspection of the outer wall

During visual inspection, look for impurities and severe damage such as chipping and cracks. These must be removed before painting with the appropriate repair plaster.

The painting of an outer wall: painting

The knock test on the exterior plaster

During the knock test, tap the façade with a hammer and test whether the plaster tends to flake off or even crumble. These damaged areas must also be widely exposed and re-plastered.

Perform the suction test on the facade

The suction test will tell you how much the plaster will later absorb the facade paint. If infused water quickly penetrates, you need to apply a deep foundation.

Scratch test on the plaster

With a screwdriver, a wire brush or a nail you can perform the scratch test. Thereby you find out, whether the plaster sanded. If so, a depth reason is also necessary. Maybe also a removal of the plaster with subsequent re-plastering.

The wipe test on the facade color

When wiping, pass your hand over the old paint on the outside wall. If there is a lot of abrasion on your hand, the surface is chalking and must also be prepared accordingly. If everything is ok so far, you can start painting the outside wall.

Step-by-step guide to painting an exterior wall

  • possibly depth reason
  • exterior paint
  • possibly repair plaster
  • cover
  • duct tape
  • Tassel (brush)
  • paint roller
  • brush
  • framework
  • possibly high-pressure cleaner

1. Preparatory work

Glue all doors and windows with a hard-wearing masking tape.

First you have to subject the outer wall to a thorough cleaning. If the pollution is also caused by mosses and lichens, you should preferably use a high-pressure cleaner. After cleaning, however, you must wait until the wall is completely dry.

2. Pre-painting of the outer wall

The conventional procedure is now a first primer or a primer (if necessary). If a primer is sufficient, you can dilute the regular facade paint with 10 to a maximum of 15 percent water. The primer is applied to the outside wall with the quast.

3. Painting the outer wall

After priming or priming you can start painting the façade wall. Always paint continuous surfaces in one pass. Make sure that you evenly stroke the respective surface. Since you can use a paint roller here, you should paint each section of the facade in the cloister, so first up and down, then left and right (cross).

Tips & Tricks

On many old exterior walls is still lime paint, as it is no longer used today. If your exterior wall is also painted with lime paint, you must first roughen it with a wire brush or a similar tool. Then a quartz flour-containing primer (primer) is applied. Now you can paint with today's commonly used dispersion facade paints.

If the plaster sanded on a large wall on an outer wall, it may happen that you have to remove the entire plaster by a few inches and then plaster again.

Video Board: How to prepare an external wall for painting