On 23/08/2014 16:48, curious wrote:
I have been quoted £950 to clean and seal 35 sq metres of back yard 15 years old. Has anyone had this done and if so is it a good lasting job afterwords. Wife wants the slabs replaced and was wondering if cleaning does bring the slabs back to life.

String, length of?

I put down the (cheapest available) slabs 25 years ago and now they are
knackered, a significant proportion have major frost damage and good for
nothing except hardcore.

*Sounds like* a cowboy quote, but it could be a good tradesman who has
budgeted for a significant amount of "making good". Did they say how
long it would take?