Norcros Adhesives #TopTips
❗️ Why is my Grout cracking? ❗️
Our Senior Technical Advisor Mike answers some frequently asked questions in our Top Tips series.
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The most common reason for grout cracking is due to background movement exceeding the flexural strength of the grout.
Cracking will generally follow the line of the tile and in some installations, the grout will begin to lift out of the joint. This is generally the first indication that there is excessive background movement within the installation and in worst-case scenarios tiles may begin to crack and de-bond.
The most common cause of background movement is drying shrinkage within the substrate; deflection or thermal movement.
Ladder cracking or grout pulling away from the sides of the tiles are indicative of drying shrinkage within the grout itself and is generally caused by either excessive water being used when mixing the grout or during the cleaning-off process, or the joint width exceeding the limitations of the grout
For technical advice on any of our products call our helpline on 01782 524140
www.nxadh.co.uk
#Grout #GroutCracking #Tiles #Tiling #NorcorsAdhesives
