What do you use to grout facade stones?
When grouting graywacke facade stones, a special natural stone joint mortar is usually used. This is tailored to the specific properties of natural stones and prevents discoloration or damage. The flexible adhesive mentioned in the installation instructions for facade stones is suitable for securing the stones, but is not suitable as joint material.
It is important to choose a joint mortar that is suitable for outdoor use and can withstand weather conditions. Additionally, it should be flexible to accommodate movements in the masonry. Many manufacturers offer special joint mortars for natural stones that can also be color-matched to the stones.
I recommend asking a specialist retailer or manufacturer for a suitable natural stone joint mortar that is suitable for facade stones.
Here is a top 3 list of natural stone joint mortars, prioritized by quality
PCI Carraflex
A high-quality, flexible joint mortar specifically for natural stones. PCI Carraflex prevents discoloration and is suitable for both indoor and outdoor use. It is characterized by high load-bearing capacity and color stability.
Ardex MG
This fast-setting joint mortar is ideal for sensitive natural stones. Ardex MG offers a fine, smooth surface and effectively prevents discoloration. It is available in various shades to match the stone perfectly.
Sopro NFM
Sopro Natural Stone Joint Flex Marble is a flexible, water-repellent joint mortar specifically designed for discoloration-sensitive natural stones. It is suitable for both indoor and outdoor use and offers high color fastness as well as smooth processing.
The above-mentioned products are known for their excellent quality and reliability and are often recommended by professionals for grouting natural stones.
If you have any further questions, we are happy to assist you.
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Disclaimer
Please note that the establishment, implementation, compliance, and control of laws, regulations, and official requirements are your responsibility. As a supplier of natural stones from quarries, we cannot be held liable for non-compliance with legal regulations or construction requirements. Due to the natural characteristics of our products, it is neither practical nor possible to subject each individual stone to an elaborate inspection.
We strongly recommend that you review all relevant legal regulations before using our products and seek expert advice if necessary.
