Which type of grout is typically recommended for exterior applications?

Polymer-modified grout is the recommended option for exterior applications due to its enhanced durability and resistance to environmental conditions. This type of grout incorporates polymers, which improve the adhesion and flexibility of the grout once cured. Such characteristics are crucial when it comes to exterior applications, as they allow the grout to better withstand changes in temperature, moisture exposure, and other conditions that can lead to cracking or deterioration.

Polymer-modified grout is also less permeable than traditional grouts, which helps prevent water infiltration that could cause damage over time. Additionally, this type of grout can accommodate slight movements in the substrate, which is beneficial in outdoor settings where the ground may shift or settle. Therefore, using polymer-modified grout is a best practice in tiling for exterior projects to ensure long-lasting performance and resilience against the elements.