Fixing a ceramic tile pavement on top of an old one

The social need for change, innovation, together with the wear and deterioration in ceramic pavements due to usage, have led to an increased trend in replacing these with other different formats and trends.

Ceramic pavements deteriorates with daily use.

Traditionally it was necessary to remove the old pavements to replace it with another new one.

Before the new fixing, the support must be prepared appropriately, which increases implementation times.

Current designs, with large sizes, leave the factory warped, and this hinders fixing.

These defects can make holes between the fixing material, the part and the support, and in time they can damage the tiles and sometimes, cause them to work loose.

For correct fixing without removing the old support and ensuring quick service, a very adherent, fluid adhesive has to be used like VAT® FLUID.

Solution

PREPARING THE SUPPORT

Clean the support well and open the pore with water and hydrochloric acid at 50%. Clean any remains with plenty of water.

APPLICATION

Mix VAT® FLUID with the amount of water needed for an even mixture, pour the material and brush with the help of a semi-circular notched trowel.

Fix the parts, applying firm pressure with a to-and-fro movement, until the grooves are fully flattened.

Leave a minimum 2 mm joint between tiles and then fill with the BORADA® joint mortar range by PROPAMSA®.

Recommendations

Apply the adhesion primer PROPAM® GRIP.
Any significant unevenness defects can be levelled to 10 mm with VAT® FLUID, between 3 and 6 hours before fixing the coating.
For applications where quick service is required, used VAT® FLEX RAPID.
Treat the movement joints appropriately, respecting the structural joints, perimeter joints (in spaces over 7 m²) and intermediate spaces (indoors every 40 m² and outdoors every 10 to 25 m²).