Common issues and queries you can face
Use polymer-modified cement-based adhesives
A cement-based adhesive must be used for exterior work. Whilst standard cement-based tile adhesives are suitable for exterior use, highly polymer-modified adhesives offer enhanced bond strength, reduced porosity and therefore better resistance to frost & greater resistance to movement (thermally induced movement is inevitable particularly for walls). Tiles recommended for exterior use will often be fully vitrified and these also require a higher specification for the adhesive.