How to fix the "wall crack"
To repair worn
plaster on the walls, removing it is neither the best nor the cheapest method.
In most cases, it is recommended to apply a new plaster over the old one. One
of the best ways for foundation repair is to cover
it, instead of removing it. It's not just more
natural, but it's even more logical.
Why do they appear?
We all affect
the environment regularly. We give it
shape, we change it and adapt it according to our needs. As a result: some rising pollutants that affect the facades
of buildings. Some contaminants,
especially organic contaminants and dust, are deposited on the facades of the
houses. This encourages the development
of mold, algae, and fungi - resulting in
a phenomenon called microbiological corrosion. How can you recognize it? When you notice a brown-gray film on the surface of
the building. These are colonies of microorganisms in a developmental state. In later stages, they can
permanently damage the facade.
If you fail to
stop this process from time to time, sometimes needing to remove and replace
the plaster, the damage may extend further, especially if there are favorable
atmospheric conditions. For example, this problem affects the North-facing
walls. Also, when the house is in the vicinity of vegetation or the environment
is wet, microorganisms thrive.
Clean the old plaster
First of all, it
is necessary to clean the surface of the old plaster, especially in the damaged
and contained areas: you must get rid of dust, traces of smoke or any other
contaminants. The best method is to use the CT 98 cleaning solution and then
wash it with water under pressure. A too heavy water jet can worsen the
integrity of the places where the plaster needs repair. If the facade is contaminated with algae or fungi, it is
recommended to use a unique concentrate
that can remove these harmful factors. Click
here.
Applying a fungicide concentrate
In places where
a so-called biological attack (mold or algae) took place, use a fungicide concentrate with a brush or
spray on the freshly washed facade.
It is necessary
to repair the parts of the wall where the thermal insulation has been mechanically damaged, and the continuity of the reinforcement mesh
has been interrupted. You must remove this part of the facade using an angle
grinder or another suitable tool. Also, remove the reinforcement mesh around the
affected section. Next, remove a section of the thermal insulation material and
stick it to the affected area.
Apply adhesive
After the mortar
or polyurethane adhesive has hardened, apply mortar
to the place where you removed the plaster. Then use the curing net to the fresh mortar. This mesh must be more significant than the distant section to
overlap with the already existing part
with approx. 10 cm.
After cleaning
the plastered surface and making insulation and curing repairs, it is time for
a new layer of plaster. Applying it directly to
the old layer can cause problems, and on the other hand, it is not economical. To solve rough areas, you should smooth the surface of the old plaster with
an adhesive and mortar for hardening. This method is much more comfortable and
convenient than the snoring way.
After the base
coat dries, it is essential to apply a primer - a
significant step when applying thin layers
of plaster. Using a substrate improves the adhesion strength of the plaster and
reduces the possibility of surface stains due to the properties of the
substrate or inadequate preparation.
Apply the thin
layer of plaster after 4 hours after the primer has dried completely. If you
use mineral plaster for subsequent painting, it is essential to apply a paint
coat before to ensure that the plaster has the necessary resistance to
atmospheric conditions. Using a stainless steel trowel, apply a uniform coating of plaster on the prepared substrate.
Collect excess material and add it to the bucket of the product. The remaining
area should be smoothed with a plastic
spatula.
Check out this
useful site: http://www.nipponpaint.com.sg/resources/painting-articles/fix-wall-cracks-with-paint/
The plaster will
dry in 12-48 hours, depending on substrate, temperature, and humidity. While the loads continue and the
plaster dries, the substrate temperature of the ambient environment must be
between + 5 ° C and + 25 ° C and the humidity is below 80%.