• The Marshalls Shop house building walling range consists of two distinct types: Reconstituted walling made from Yorkstone aggregates with the characteristics of natural stone and the consistency of modern production methods. The second type is Blue Pennant sand stone walling from our Gwryhd sandstone quarries in West Wales. Both types can be used in stone walls that enhance any setting. Unlike many other e-commerce sites, all of Marshalls house building wall stone is eligible for FREE mainland UK DELIVERY on a day that suits you, and comes with a one year guarantee.