In reply to The New NickB: The first hit on Google has a photo of what I'd term a flag wall so I suspect it's whatever the local term for a dressed slab of stone is. Maybe pigstone comes from them being used for flooring in pig styes. I've seen them made from gritstone in Saddleworth - my mother-in-law's house has them as boundary stones for the back yard - these are big being about 8' x 4' x 4" and have the advantage that they don't take up much space.
They do exist elsewhere - there's a lot around Hawkshead using slate rather than gritstone and I think I've seen shots of similar walls in the States. See some of the shots at the bottom of this page http://www.keswick.u-net.com/90331.htm for the Hawkshead style.
Nick, I had to look that up but couldn't find the image you referred to. I'm assuming you mean walls from large upright slabs like the pics Bob has posted? I've never built them but I do know someone who has and he's from the SW Lakes I've taken the liberty of copying his contact profile off the Drystone Walling Association forum:- http://forum.dswa.org.uk/memberlist.php?mode=viewprofile&u=11
If you don't get anywhere with Gerry could do no worse than either posting a request on the 'work wanted/offered' section of the forum or searching the appropriate area on the 'professional members' map and contacting a waller that way.
They shouldn't be too difficult to fix provided they are not broken. As you'd expect the main construction technique is sitting them upright in the soil and close together. Some of the slate ones I've seen have little nicks in them which the next stone just slightly rests in and so on, thus the whole 'wall' is slightly but cleverly connected.
> They shouldn't be too difficult to fix provided they are not broken. As you'd expect the main construction technique is sitting them upright in the soil and close together. Some of the slate ones I've seen have little nicks in them which the next stone just slightly rests in and so on, thus the whole 'wall' is slightly but cleverly connected.
Some probably need re-sitting, but it will mainly be a reinstatement job, will need about 50 appropriate gritstone slabs sourcing and laying (probably not the right term). Quite a big job, but I'm not personally paying for it. They tend to be fixed together with two diamond shaped metal plates on a bolt.
Contact the stone museum, not sure of it's proper name, at Wirksworth. They have examples of many different types of 'walls' and who built them. They may have a list or know of a source of suitably qualified people. Will find it's name on Monday when I am in Wirksworth.
I'd call it a flag fence and if I had any experience with them, I'd do you a quote. Sadly I haven't yet worked on that type of wall but I will pm you with the details of some local wallers who should be able to help you out.
The list you'e been given contains all the members of the DSWA operating in Lancashire.
Just a couple of points to consider when choosing someone:-
I don't think there is a great deal of conventional drystone walling skill in building/repairing these - but if I was picking someone I'd choose some one who'd done it before (OK, so I'm a bit contrary!!).
They appear rather uncommon around your area but they are relatively common in some areas of the lake district.
One practical problem you or the guy/girl you use may be finding a quarry still open which can obtain the slabs in the right thickness and size.
The cost might be eye watering. Rough stone for a conventional drystone wall is around £30/tonne delivered. 1 tonne is enough for roughly 1 running metre of wall. Then there's the cost of labour to build the wall: £25-£30 per running metre.
Just costed some reclaimed Yorkstone slabs - not sure of the thickness but I think they are around 60-70mm, Delivered cost is £90 per square metre. The slabs at my mother-in-laws are around 6ft6" x 4ft so 2.4m^2, they are a bit thicker as well so each one would be over £200!