I have just finished pointing my patio, I used ready mixed mortar and wickes red cement dye.
Its been down for a week or so and is crumbling, when i dig a bit out it snaps just like a biscuit.
Other pointing i have done with this ready mixed mortar has been fine and sets really hard.
Should i be using something else for pointing a patio ? or is it the cement dye causing the problem ?
TIA for your help