We visited a flagstone border job that we did next to concrete.
They forgot to do it and we noticed something very interesting.
Where the water ran over the flagstone, the joints started to crack.
You can see, from the above graphic, that there are cracks exactly where the water is draining off.
Where it is dry, there aren't any cracks.
That is why we always suggest to people to put Siloxane Sealer on their flagstone.
You see the cracks from the water running down.
So, always make sure you put a sealer over your stone work.
I will be on the look out for new ideas and products to keep your stone and flagstone looking great. Make sure to sign up for our free newsletter below, so I can pass along any new info!