ISOTEC restoration plaster

Even if the cause of the damage is dealt with, time must still pass before the damp masonry has fully dried out. The ISOTEC restoration plaster creates the conditions so that salts can crystallise during the drying phase of a building component, without doing damage (various salts can be stored in liquid form in the masonry).

The individual steps of ISOTEC restoration plaster processing

The problem: Crumbling plaster due to salts

Various salts can be stored in liquid form in the masonry. These are transported by capillary moisture into the old plaster. When the moisture evaporates, the salts form crystals whose bursting pressure can lead to crumbling of the plaster. The ISOTEC restoration plaster solves this problem.

ISOTEC system solution

: Removal of the old plaster

1. Removal of the old plaster

First, old paint, old plaster and any other hindering materials are removed from the masonry. This removes the greater part of the salts that can be stored in liquid form in the masonry and damage the building. Then the masonry is prepared to take on the machine-applied plaster.

: Injection inner

2. Machine-applied plaster

For the restoration to succeed, it is important that the restoration plaster has optimum adhesion to the masonry. Therefore, before the ISOTEC restoration plaster, machine-applied plaster is applied to optimise the adhesion. This is done like a net, to ensure excellent anchoring of the restoration plaster.

: Application of ISOTEC repair plaster

3. Applying the ISOTEC restoration plaster

Finally, the ISOTEC restoration plaster is applied to the wall. Depending on how salty it is, it can be in one layer or two. Its water-resistant characteristics prevent the capillary transport of the remaining water to the plaster’s surface.

An overview of your benefits:

Damage-free drying out of the salty masonry
Restored rooms are able to be used again quickly
Better living climate
Real estate increases in value

The active principle of the restoration plaster

: Restoration cleaning principle

The high permeability of the restoration plaster promotes the drying of the restored masonry. Its extremely high proportion of air pores is important - over 40% of the volume. Because of this, the damaging salts present in the masonry can be drawn out into the air pores. In the pores they can crystallise and stretch - without the possibility of damage. Therefore, it reliably prevents the plaster from crumbling.

Crystalline bursting power - Salts as the enemy of buildings

: Crystalline bursting power

Natural salts from the earth are dissolved in water and enter the masonry by capillary transport, where they can be stored in liquid form. When they dry out, the dissolved salts form into salt crystals. During crystallisation they enlarge in volume and can burst mortar and plaster as they do so, even destroying the construction material’s consistency. In extreme cases this can lead to a weakening of the masonry’s static structure.

WTA: Tested and found good

: WTA-Logo

At ISOTEC we only use systems that pass the strictest tests and fulfil all criteria. The WTA (scientific and technical workgroup for the preservation of buildings and historic monuments) also certifies that the ISOTEC restoration plaster has passed the testing criteria in the WTA info sheet “Restoration plaster systems”.