Clean stone for drainage - what are you paying per tonne? And should I avoid limestone?

[DIYNotIan]

Hi all

I've got various land drainage projects I'll be starting soon... The going price for clean drainage stone here in South Wales is £37 per bulk bag / tonne. I wondered what kind of prices other people are paying? I've read in other forums people paying a lot less than that, but maybe it has gone up in recent years?

Also, many of the drainage websites advise against the use of limestone for drainage because it is porous and isn't inert. One site says: "Limestone can precipitate calcium carbonate in wet conditions, depositing minerals that can clog up the drain." At the same time other sites say it IS good for drainage. In fact, this one lists a whole bunch of uses for it:

https://www.stamfordstone.co.uk/2018/08/09/limestone-aggregate/

And it seems to be all that is available around here from the aggregate suppliers, so I'm guessing a lot of people are using it.

I wondered what you guys think?

Cheers

 

[scbk]

How much are you after? Cheapest is on a lorry from the quarry, 6 or 8 wheeler. Or if you have a means to collect small loads from the quarry yourself (hire a trailer/3.5t tipper?)