All paving should be laid on a firm, well drained base to ensure
long term stability and usage.
It is essential for preparatory groundwork to be correct and the
use of hardcore as a sub-base to ensure adequate site drainage for
your paved area. Poor drainage may result in water retention which
will affect the stability of the natural stone. All vegetation and
top soil should be removed to an approximate depth of 165mm ensuring
that allowance is made for a fall of 1:60 away from any buildings
and walls for surface drainage.
Then lay a 100mm sub-base (150mm
for vehicular traffic) of compacted hardcore.
All Natural Stone Paving should be laid on a full, wet bed of 25mm
thick mortar (5 parts building sand to 1 part cement).
It is usually preferable to start with full slabs laid adjacent
to a fixed point such as the house or boundary wall and work towards
an edge which may be adjustable.
When laying, we advise ‘buttering’ the underside of
each slab using waterproof tile adhesive or cement slurry to help
the stone bond to the mortar. Ensure enough mortar is spread into
each joint, and with a trowel, draw and butter this mortar to the
side of the slab, thus minimizing pointing afterwards. Tap each
slab down to the correct level using a rubber mallet. Continually
check levels and falls during the laying process across the top
surface profile of a number of slabs. It is important to
equalize the slab joints as you progress by gently using your trowel
as a lever.
Information based on 10mm joint
Do not walk on the paving for at least 24 hours.
Important Note: The largest face should be used uppermost, as shown
If your project involves cutting, the use of a powered disc cutter
is necessary. A diamond tipped blade is recommended for natural
stone to ensure clean and accurate cutting. Always wear appropriate
personal protective equipment, i.e. goggles. (Useful tip: To
help maintain the ‘hand-dressed edge’ appearance,
it is advisable to cut from the back face to within 5mm of the
front face and then carefully break the slab over a straight