How To Maintain Clay Pavers Technical Guide For Contractors And Designers
Minimal Maintenance Needed For Clay Pavers
Generally, clay paving requires no or minimal maintenance providing the paving has been laid in accordance with “BS 7533 – Pavements constructed with clay, natural stone or concrete pavers”, the Code of Practice for laying precast concrete paving blocks and clay pavers for flexible pavements.
Resistant Clay Pavers
One of the advantages of clay paving is its ability to resist discolouration from dirt/oil/fats etc., having a low water absorption and high durability preventing stains penetrating and becoming ingrained into the surface. Oil/diesel etc. tend to lay on the surface of clay pavers and are dispersed naturally. Any stubborn build up can be removed by off the shelf de-greasers followed by rinsing down with clean water.
How To Maintain Paving Joints
It is important to ensure sanded joints remain completely full and following completion of the construction process it is imperative not to carry out suction street cleaning for at least 6-8 weeks which will allow general dirt and detritus to naturally seal the sand in the joints. Should there be a high incidence of street cleaning required, for instance outside fast food outlets where the use of high pressure water jetting or mechanical sweeping is used, this will remove sand between joints and may weaken the integrity of the surface. If joints between pavers are void of sand these must be re-sanded using fine dried silica sand. In any situation where a flexible/unbound construction method is used, whereupon jointing sand may be regularly removed by pressure washing or scouring, it may be beneficial to apply a joint stabiliser/paver sealant which will prevent jointing sand erosion. RESIBLOCK ‘22’ is a specialist jointing sand stabiliser designed for heavy duty small element flexibly laid clay paving , or similar approved. Please be aware that some general sealants may alter the colour of any surface they are applied to and as such we would strongly recommend a trial area is determined. For further advise email [email protected]
Maintaining A Pristine Appearance For Contractors And Designers
To maintain a pristine appearance, particularly in north facing sheltered areas receiving little or no natural sunlight which may be overhung with trees or vegetation and very little footfall, algae may appear in the sand joints and paver surface. This can easily be removed by applying a soap-based product, such as Armillatox Outdoor Cleaner, which also inhibits the further growth of algae. Any stubborn stains and detritus can be removed by a pressure washer ensuring any jointing sand removed by this process is replaced as detailed above. This will return the paved area to ‘as new’ appearance.
Following the cleansing operation as described above it may also be beneficial to stabilise the joints and seal the surface which will inhibit future algal growth in specific problem areas.
To prevent the establishment of algae please ensure paved areas are laid to falls directing surface water into a drainage channel. Areas laid flat or have insufficient cross fall may retain moisture and detritus encouraging algae to gain hold and staining from dirt. In areas with a low footfall preventing the natural dispersion of dirt from the paving surface, it may be necessary to sweep these areas more regularly. Persistent moss/algae growth can be removed by the application of a product called Sapphire available from Agrigem. Continued use of Sapphire will inhibit the further growth of moss and algae.
Graffiti Or Paint
Should any graffiti or accidental damage be caused by spilt paint etc., lifting of existing pavers and turning them over followed by re-compaction and sanding of the joints should fix this problem.