Plastered walls in the garden are stressed over time by heat and frost, which can lead to cracks. A common method for closing these places is the introduction of joint filling profiles.
Cracks in the wall should be repaired promptly
crack types
Cracks in masonry have various causes that need to be discussed. This includes defects in the subsoil or in the foundation. There may also be weak points in the structure or design errors. Minor damage is often caused by extreme weather conditions.
This is how it's done
Measure the dimensions of the crack to define the required length of joint filler. In most cases, a diameter of five millimeters is sufficient for repairs, as most of the damage is no wider. If the crack is smaller than the filling strand, widen it with an angle grinder or joint cutter. Sweep the gap well with a brush so that the filling seals properly.
Repair damage:
- Fill the crack with PU foam
- Press the joint filling profile directly into the gap
- Cut off hardened foam residue after one hour
Rest of the procedure
Carefully tape the crack in the wall on both sides with masking tape and brush the repaired areas with primer. As a result, the later coat of paint and the sealing acrylic mass adhere better to the ground. Apply the substance until the substrate is saturated.
tips
A colored deep primer is suitable as a primer for highly absorbent materials such as plasterboard, lime and cement plaster. This strengthens the subsoil and reduces the suction behavior.
post processing
Using a squeezing gun, fill all cavities with acrylic mass. Level the substance with a spatula or joint smoother. Putty is an alternative to acrylic. After the filling has hardened, peel off the masking tape. The wall is now ready for a new coat of paint.
Special filling materials
Very small damage can be repaired with special fillings, so that no filling profile is necessary. Expodit resin seals and connects cracks up to 0.1 millimeters wide. If the gaps are less than 0.2 millimeters wide, cement suspensions provide a non-positive seal. Polyurethane resins are used for damage smaller than 0.3 millimeters. Experts often use cement slime for cavities with a crack width of less than 0.8 millimeters.