Trying to keep natural stone paving clean is a task that requires thought because there are so many variables which can affect the result. People also have very different tastes. One person might like rustic looking , mossy stone while the next person could devote hours to keeping their patio as clean as a pharmacy. When considering how to keep your new natural stone paving clean it is important to bear in mind the following:
One of the biggest factors in determining the cleanliness of your garden paving are the physical surroundings. If the garden is North facing then the chances are that your garden will be damp and these damp conditions are a haven for algae which causes discoloration to garden patios. Also look around and see how many trees are in the close vicinity. Leaves can make a real mess of natural stone, leaving behind prominent stains (these stains can be removed but can cause irritation to people who like things to look neat and tidy)
This is also a key decision which will have a big impact on the level of maintenance your garden patio will need. If you want a low maintenance garden patio it is important to choose a dark coloured stone which will not show up dirt, or choose a really hard wearing stone with low porosity. Harder stones are much less porous and while they will still absorb water and dirt, they will absorb it more slowly than softer natural stones. I have always found kota blue and kota brown limestone to be low maintenance. Indian Sandstone which originates from Kota is also very hardy. Softer stones will require more maintenance although Yorkstone paving seems to be an exception to this rule.
Take professional advice
For more specific information on the maintenance of natural stone it is always a good idea to take specialist advice from your stone merchant. A good stone merchant will be able to give you really good practical advice on the best type of natural stone for your garden and help you to avoid the major pitfalls.