Sandstone · Walling
Sandstone walling stone supplier to the UK trade.
Karpat supplies buff sandstone walling blocks to UK stone merchants and builders' merchants — coursed walling in the sizes the trade actually lays, produced to order and shipped by the container from Spain or India. Split face walling stone and tumbled walling stone, undyed or finished, in the buff and brown tones that read as weathered Yorkshire. We are the material supplier: we buy direct from the producer, disclose the origin and the transit, and land the container duty-paid.
Format 01
140mm coursed walling
140mm coursed walling on a 100mm bed, in random lengths of roughly 350–450mm, is the UK building-stone standard — the course height a bricklayer works to and the bed depth a cavity wall needs. It is worth being precise about this, because most sandstone exported for walling is 40–80mm, which is cladding pinned to a backing rather than stone bedded in mortar. We quote 100mm on the bed as a bed, not as a nominal figure, and we ask the producer to prove it on the loading calculation before we buy.
Format 02
Split face walling stone
The face is naturally split, so every block carries its own fracture rather than a machined pattern. Both beds are sawn — a course will not sit true on one flat face — and the ends can be sawn or left as split, depending on how tight you want the perpends. Most orders are split face walling stone straight off the cropper, supplied undyed for merchants who dye, tumble and age in their own yard, or finished where you would rather buy it ready.
Format 03
Tumbled and Victorian walling stone
Tumbling knocks the arrises back and gives the reclaimed, softened edge that reads as Victorian walling stone once it is laid and pointed. It is the choice where the softer, older look is wanted from day one rather than after twenty winters. Tumbling also exposes fresh stone at the edges, so the colour of a tumbled block can differ from a split one from the same bed — another reason we approve colour on samples.
Container economics
Walling is sold by the m², and bought by the tonne.
A wall face of 140mm coursed walling on a 100mm bed weighs roughly 240 kg per m². At a 26 tonne payload that is about 108 m² of wall face geometrically, and 90–100 m² once crating and breakage are allowed for. A 20ft container is the right box: the load is weight-limited long before it is volume-limited, so a 40ft carries barely more payload and buys nothing.
This matters when you compare quotations. A price per m² is a price per tonne wearing a disguise, and it moves with the bed depth. If a producer offers 200 m² in a container they have quietly reverted to thin cladding; if they offer 70, they are pricing a deeper block than the one you specified. We check the arithmetic on every offer before it reaches you.
What we supply — and what we don't
Material to spec, documented.
- We supply — sandstone walling produced to your course height, bed depth, length range, face and finish, with samples approved before the order is placed.
- We document — we obtain the producer's test data for the material offered: BS EN 771-6 (natural stone masonry units), BS EN 12371 freeze-thaw and BS EN 13755 water absorption, with a Declaration of Performance. Frost durability is the figure that matters in a UK wall, and we ask for it before quoting rather than after.
- We don't — hold stock, design the wall, or carry out the work. Supply is order-based, arranged with the producer once an order is placed.
Natural stone carries 0% import duty into the UK from any origin, so there is no duty line and no origin certificate to chase. We deliver duty-paid in GBP, or supply FOB/CFR for buyers running their own forwarders.
How we source
Two origins, stated on the quote.
Imported sandstone has supplied the UK walling trade for a generation, and we buy it from two places. From northern Spain, a buff sandstone split, pitched or tumbled at the quarry — cream to honey in tone, about 3 days by sea to UK ports. From Rajasthan, the established Indian colours: Autumn Brown, a creamy brown with darker and lighter tones through it, and Rippon Buff, the closest to Yorkshire buff, about 26 days in transit. Both are subject to stock availability, and we state the origin and the transit on every quotation. Send the course height, bed depth, length range, face, finish and quantity; we approach the producers on your behalf, check their loading arithmetic against the geometry, and come back with comparative offers and a delivered-UK estimate.
Quote on sandstone walling.
Send the course height, bed depth, length range and quantity. We come back with producer offers, the container yield, and a delivered-UK estimate.
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