Should I seal my outside patio?
Stone patios can often be the most neglected stone floor in terms of sealing, but arguably the most important. With your patio experiencing heavy traffic flows, rain water and lots of outside muck and dirt it is advisable to make it as strong as possible.
What happens if I don’t seal my patio?
A common method of patio maintenance is to simply jet wash in the summer. Unfortunately you are only tackling the problem at surface level, which means all the dirty rain water and now jet wash water lurks in the structure of the stone. This will cause the stone to mould and then over time erode away.
What are the benefits of sealing my patio?
Sealing will not only protect your patio from rainfall but also dirt, which will ensure your exterior looks cleaner for longer. Your patio will keep the water and dirt at surface level allowing dirt to be simply wiped away, instead of penetrating the stone.
What sealer should I be using?
A water repellent penetrator is the perfect choice for a garden patio. A coater will discolour with light, can be easily worn away, will only protect the surface of the stone which will allow water the infiltrate from below and will potentially leave your patio with a glossy finish. An oil repellent impregnator will provide a stronger internal seal than necessary, blocking the stones inability to breathe. Then when stagnant water inevitably penetrates the stone over time, it cannot escape with evaporation, which will cause internal mould and erosion.
A water repellent impregnator will bond tiny crystals to the pores. These crystals will prevent rain water and dirt from penetrating the stone but because the stone retains the ability to breathe it can still evaporate any stagnant liquid. High quality water repellent sealers can last up to 15 years and because the bond is strong it can stand up to the strength of a jet wash too.
For advice about how to apply your sealer check out our How to guide.