bedding mix for flagstones - have I messed up?

[goosebump]

Yesterday I finished laying a new hearth, using slate flagstones reclaimed from other bits of the house. The flags are on a base of 1 part NHL 3.5 lime, 6 parts sand. Its a deep bed - between 30 and 60mm depending on the depth of stone on top. I used building sand, and have since found out its a no-no for this kind of work.
I would prefer not to lift and relay the flags, whats the verdict on whether my efforts are adequate? The stones have a free edge facing the room - is all the sand going to squidge out over time? The hearth will have a multifuel stove on top, perhaps a cat as well

 

[gregers]

think youve answered your own question,with

I used building sand, and have since found out its a no-no for this kind of work.

 

[stuart45]

goosebump,
I wouldn't worry, it's not like you are going to be walking over it all day.
As long as it's gone off OK it will be fine.