Most of the stone plates can be attached instead of mortar. Only thick and heavy plates in the soil laying should be better laid in the mortar bed. When sticking, it depends next to the nature of the natural stone back on the adhesive surface. For each material combination, there are efficient and durable adhesives.
Adhesive mortar or pure adhesives
The differentiation between mortar (7.79 € at Amazon *) and glue is fluent in some mixtures. For the horizontal installation on the ground provide additives in the mortar for adhesive properties. If natural stone plates are glued to the wall, pure adhesives are required.
- Also read - Natural stone slabs Lose Lay without mortar or glue
- Also read - Stick natural stone slabs partially or fully glued to a wall
- Also read - Grouting natural stone slabs open or closed
In addition to the material properties of the materials that are connected to one another, their "preparation " is important. Soft rocks such as sandstone and marble should be pretreated with primer. Grid-shaped fabrics are also possible, which are attached to the back of the natural stone slabs with special adhesive.
Types of glue and substrates
The different natural stone slabs are glued to the following substrates with the appropriate adhesives:
- Natural stone can be glued to wood with polyurethane glue
- Thin bed tile mortar is the best choice for natural stone that will be laid or glued onto concrete
- Light-colored adhesives and mortar mixes for light-colored natural stone types
- For outdoor use, frost-resistant adhesives
- Construction adhesives for bricks and substrates containing lime sand
- Polymer adhesive for hard and smooth surfaces
- Tile adhesives must be expressly identified for natural stone surfaces
- The softer the natural stone, the thicker the adhesive layer (middle instead of thin bed)
Glue together in a buttering and floating manner
When bonding natural stone, especially outdoors, preventing cavitation is an important goal. In order to achieve an optimal distribution of the glue, the so-called "buttering " and "floating " are used when gluing:
1. The adhesive surfaces are brushed, watered and brushed again
2. The adhesive is applied to the back of natural stone and the wall or floor substrate.
3. The natural stone is gently moved back and forth when it is pressed on.
4th. Any adhesive that oozes out is removed or wiped off immediately.
5. According to the manufacturer's instructions, the plate is held or supported during a drying phase