5 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?
Make sure you know the 5 points listed: they are essential to obtain satisfying, long-lasting results in harmony with the surrounding landscape!
- What is the best time to paint
- What are the color regulations in force
- Tax deductions 2018
- The indispensable conditions of the walls
- Choosing the best paint
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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
State tax deductions for 2022
This year’s renovation bonus offers a tax deduction of 50%, to be divided into 10 annual installments of the same amount, for ordinary maintenance work (therefore also the painting of external walls), but only if performed on the common parts of residential buildings.
For further information, consult SCS Group ask for a quote with no obligation
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What are the conditions 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 some conditions.
Absence of cracks
It is essential to intervene promptly since 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 risk of collapse).
In the event 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 a 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, moistening the bare parts with a wet sponge, and applying a mixture based on cement, lime, sand, and water, which must be kept wet for a couple of hours and, 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 the 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.
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The choice of the most suitable exterior paint
The market offers various types of paints, each suitable for a particular condition of the facade.
Among these, there are:
suitable for walls in good condition, where 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).
they can be applied to all types of façades and offer excellent performance over time.