How to renovate a facade with big cracks

Repair of facade with cracks > 0.5 mm

In the case of cracks with a width of more than 0.5 mm, it is imperative to act immediately because the penetration of moisture can lead to a large damage to the facade.

3 steps to a new facade

A facade with cracks with a width greater than 0.5 mm should be completely rendered and the a new facade finish should be applied.

Step 1

Oprava fasády s trhlinami

Remove the loose parts from the surface.

Step 2

Oprava fasády s trhlinami

Render the facade using Baumit MultiWhite and insert the glass fiber net.

Step 3

Nová fasádna farba

We apply a new facade paint or plaster.

Step by step working instructions

1. Assess the condition of the facade

Fasáda s trhlinami

We check the crack width by means of a calibrated tool and remove the peeling parts from the surface using a spatula. Brush or pressure wash the dusty and dirty facade. If the facade still has other deficiencies, it is necessary to remove them first.
See: Render preparation

2. What do we need?

Oprava fasády s trhlinami

Prepare tools or Baumit MultiWhite renovation render for a complete repair of a facade with inactive cracks wider than 0.5 mm.

3. Renovation render

Renovačná stierka Baumit MultiWhite

Put the content of the Baumit MultiWhite into about 6.0 L of clean water. Stir well with a hand-held electric stirrer for homogeneous mass without lumps. After 5 minutes of rest, stir again. Processing time: approx. 1.5 hours.

4. Facade rendering

Prestierkovanie fasády

Apply Baumit MultiWhite to the surface of the facade using a toothed smoothing tool. Place a fiber glass lattice onto the fresh render, e.g. Baumit StarTex with 10 cm of overlapping. Subsequently, wipe the surface of the render so that the reinforcement is not visible. Reinforcement layer thickness 3 - 5 mm.

5. Render smoothing

Renovačná stierka BAumit MultiWhite

Before finishing the facade, apply the coat in two layers. After slight drying of the first layer, apply the second thin layer and after sufficient drying, treat the surface structure by a polystyrene, felt or foam smoother.

6. New surface finish

Striekanie fasádnej farby

No soon than after 3 days we apply a uniformly mixed facade paint to the surface of the render, e.g. Baumit StarColor, NanoporColor. Baumit facade paint may also be applied using airless spraying. It allows fast and even application of the facade paint in a short time even on large uniform surfaces.

Baumit products

Instructional video