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What are jointing systems? A broad choice of materials for all types of joint, with application methods including slurrying, pouring mortars for wide joints and gun-injected mortars.What is Cork jointing? Cork joints naturally accompanies the movement of concrete structures without causing deterioration, due to cork's high compressibility, recovery capacity and resilience. ... Cork-filled expansion joints do not expand beyond the joint, even when subjected to heavy traffic or high compression.What is the difference between a control joint and a construction joint? Control joints focus the cracking so that it's not ugly or dangerous. Construction joints are interruptions in the slab between different pours of concrete. Since you can't pour concrete non-stop, there is a break between sections of the pour. Each time you stop the pour, you get a construction joint.