The following information
is principally designed to address issues that arise when
specifying and working with granite work surfaces.
1. STONES ARE POROUS. In general granite
is the least porous, then slate, then marble. As a rule of
thumb it is not unreasonable to expect differing performance
per surface. Even granite surfaces are not impervious to staining
and damage. For lasting results they must be properly cared
for.
2. All UK Marble work surfaces are treated
with a water repellent sealant before dispatch, this means
that a treatment has penetrated the surface of the material
in order to help repel liquids, it can only help and does
not protect the surface, the only real protection offered
is by the polished surface itself. Stones cannot be rendered
impervious to all marking and staining.
3. Granite and Marble surfaces should be
CLEANED, resealed and wax polished at regular intervals with
“Lithofin” or a similar sealant and a non-yellowing
stone wax. UK Marble will offer to return to re-seal your
surfaces, but will charge for doing so.
4. HONED, acid etched, flame textured or
bush hammered surfaces or any treatment whereby the polished
surface has been removed by abrasion are generally less suitable
for work-surfaces. The stone is no longer protected by a polished
surface and will become more susceptible to marking and particularly
absorption of oils, water and alcohol. (UK Marble does not
generally recommend these finishes other than in circumstances
where durability is of secondary importance). Treatments such
as honing may reveal mica and quartz elements in the surface
of the stone which retain their gloss, cannot be honed and
frequently present as marks in the material.
5. Stone varies in its STRENGTH and make-up.
In simple terms granite is generally stronger and more scratch,
stain and chip resistant. Slate, limestone and marble offer
less resistance in this respect. It is always advisable to
use chopping boards in heavy-use areas. (UK Marble would be
happy to make up a small matching sacrificial chopping board
for you, but Nylon or timber boards are more suitable).
6. As a rule of thumb, marble and slate may
be more susceptible to STAINING by certain substances. The
porous nature of some stones means that some substances may
leave marks. The conventional list of ‘things to look
out for’ includes hot oil, cigarettes, lemon juice or
other acid/alkaline substances, red wine, detergents and alcohol.
These substances should be wiped from the surface immediately
as they will generally mark if left standing for some time.
7. STONE IS A NATURAL MATERIAL. This is the
most quoted phrase used by granite or stone suppliers responding
to customer queries and this is so for a good reason. Small
samples must not be considered as other than broadly representative
of the material described by the same name. UK Marble samples
in showrooms or sent through the post cannot represent the
appearance of a large sheet of material in all circumstances
but can in most. We are unable to guarantee the colouring
or character of stone and our sales are not by sample. You
can request to inspect the actual scants to be used prior
to cutting and finishing.
8. HANDLING and LIFTING. Granite work surfaces manufactured
by UK Marble are frequently very large, 30mm material will
weigh as much as 90 kilos per square metre. Please ensure
that sufficient care is taken when attempting to move or lift
granite. Consideration must be given to floor and carcass
loading as well as access. Think carefully before insisting
upon 40mm or thicker materials in large sizes. Unsupported
joints are likely to open with time and will need to be repaired.
UK Marble reserves the right to make joints in work surfaces
wherever they consider necessary commensurate with guidelines
on weights, handling, access and safety.
9. Ensure that any carcass and cabinet work
is properly fitted, level and firm, strong enough to support
the heavy Granite. Under no circumstances should carcasses
be moved after the template has been made. Standing on stone
kitchen surfaces is never a good idea and is a common cause
of broken joints. Broken joints can be repaired, but such
a visit is chargeable at an hourly rate including travel time.
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