Laying Flag Paving

Site Preparation

Paving should be laid on a firm, level and well-drained base. To guarantee long-term service and stability, it is essential to get the groundwork right.
Remove all weeds and other unwanted organic matter to a depth of 200mm across the area to be paved. Mark out the area and adjust the markings with the height to the required finished surface levels, ensuring that you allow a fall of 1:60 away from any buildings and walls for surface drainage. Make sure that the finished paving surface level is at least 150mm below the level of any damp proof course.
After excavation, rake level to ensure an even depth. Compact the area using a garden roller. Then lay at least a 75mm deep sub-base of crushed stone and compact well. If there are any hollows after compacting the sub-base, rake in sand and compact again. Spread a layer of sand across the sub-base, to a compacted depth of 35mm.

Which side of the Paving goes up?

The top surface should always have square edges, and a finished surface. The sides of a flagstone are usually tapered inwards so the top surface is slightly larger than the back of the flag. The underside of a flag is usually rough and has poorly defined edges.

When laid with suitable pointing gaps the edges of the adjacent paving will provide a wedge shaped gap, which considerably increases the durability of the finished joints.








We recommend starting with full flags, laying them next to a fixed point such as a house or a boundary wall. Alternatively start from a corner on the longest straight edge.

If you are laying more than one size of paving, particularly if you are using a random pattern, or if you are laying a circle or other feature, we advise that you dry lay the flags first to check the fit to make sure you are happy with the pattern.
We suggest that at the beginning of a project you should take the paving from a number of packs. In order to ensure consistent colouring throughout your finished patio even if you are using just one size.
For best stability the paving should be laid on a full mortar bed, using a wet mortar mix of 5 parts building sand to 1 part cement.
Lay each paving stone down to the required level, keeping a piece of softwood between the hammer / mallet and flag. Continually check levels and falls during the laying process across the top surface profile of a number of flags at a time.
It is essential to ensure that there is correct spacing between the flags, please note that when using random patterns the joint widths can vary.


We recommend that you use Jointex Pavement Fixing Mortar for pointing.

Available in 3 Colours:
• Neutral
• Stone Grey
• Basalt

Available in 15kg buckets

• Easy Joint is a Single Component, Air Oxygen hardening pavement fixing mortar, ready mixed and packed for immediate use.
• Easy Joint is permanently water permeable, resistant to high pressure cleaners and prevents weeds from sprouting.
• Ideal for the Jointing of Natural and Concrete Stone Paving as well as slabs and clinkered surfaces outdoors.
• Easy Joint is suitable for pedestrian traffic and for vehicle traffic, if the Paving Stones are solidly set in a mortar foundation.