Things You Need To Know Before Painting Exterior Walls

Do you want to paint the exterior walls of your home, because they are damaged, discolored or to give them a new look? waukesha painting company

What is the best time to paint the exterior?

It is preferable to carry out the painting work in spring and autumn , on days when the temperature is not below 5 ° C and in the absence of rain and wind .

Excessive exposure to the sun’s rays could cause problems ; therefore, we recommend that you proceed by painting: the west wall early in the morning, the north in the late morning, the east in the early afternoon and the south in the evening.

In addition to this, you should pay attention to the temperature of the substrate (which can be very different from the external one) and to the drying time (which varies according to the climatic conditions) and to the limit temperatures shown on the technical sheet of the paint.

What are the color regulations in force in your municipality

Most Italian municipalities have adopted their own Color Plan (or equivalent regulation) which limits the range of colors that can be used for building facades (homes and commercial buildings).

Before starting to paint the external walls, then go to the Unified Building Desk , or to the Technical Office : there you can get all the information you need

What are the condition of the walls?

Everything seems to be ready to start painting, if not for a final check, that of the surface on which you are going to operate; to proceed with the painting and obtain good results, the walls must necessarily meet certain conditions.

Absence of cracks

It is essential to intervene promptly, as even a small crack can expand and cause damage to the building (such as infiltration of water and humidity) and weaken the load-bearing structures (with the risk of collapse).

In case of cracks, repair them , apply a skim coat reinforced with glue and mesh and finish with a thick coating, or finish off and paint after applying fixative .

This is a solution that you can successfully adopt in minor cases ; in the presence of deep and serious injuries, it is always better to request professional intervention, in order not to compromise the safety of the entire building.

Absence of peeling

In case of peeling, it is advisable to intervene by removing the damaged plaster , moisten the bare parts with a wet sponge and apply a mixture based on cement, lime, sand and water, which must be kept wet for a couple of hours and, once once adhered and dried, sanded to align with the old plaster still intact.

Only then can you start painting the wall.

Before working on the plaster make sure you have good dexterity and the necessary equipment, otherwise the damage could be greater than the benefits.

Getting professional help can save you time and effort.

Absence of humidity

Before you start painting, you also need to make sure your walls are free from mold, algae and moss .

To protect the health of the inhabitants and prevent the signs of humidity from returning even after painting, we recommend that you rely on a professional diagnosis of the thermal insulation of your home.

The choice of the most suitable exterior paint

The market offers various types of paints, each suitable for a particular condition of the facade.

These include:

Acrylic paints:

suitable for walls in good condition, in which only the paint has aged


recommended for porous, floury walls or those exposed to a particularly humid climate

Siloxane paints :

ideal in cases where atmospheric conditions are particularly aggressive (very hot and cold periods alternate).

Quartz paints:

they can be applied on all types of façades and offer excellent performance over time.

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