Limestone paving slabs: frequently asked questions

Limestone Restoration Repair London

Limestone is an entirely natural product, and an excellent choice as paving for driveways, patios and walkways. As a building material, it’s also a key component of cement. And while it may look quite similar to sandstone, it’s actually a very different substance.

Here we answer some questions people often ask us about this stone and its use in their properties.

Will my limestone paving slabs fade over time?

The rich, dark colour of this stuff does mean limestone can be prone to fading. (And all natural stones are the same.) So with time, UV rays and weather, this can happen.

Equally, limestone incorporates pyrite, a soluble iron sulphide. This can dissolve in water and air to create a discolouring sulphuric acid. But you can help prevent this loss of colour with sealants which stop water from getting in, and block the bleaching effects of UV rays.

Should I seal my limestone paving?

Sealing helps avoid damage from rain, as mentioned, as well as from salt. And it can help halt moss growth in its tracks as well. All in all, a good sealant can keep your paving slabs looking as they did when you bought them.

What about drainage and water absorption?

Limestone is porous. So it will need an effective drainage strategy if it is to cope with anything more than a light drizzle. That means it works best on a sloping gradient. And, actually, provided it’s fitted properly, you shouldn’t experience any significant issues.

Can this stone overheat?

While warm weather has not traditionally been a problem in the UK, clearly the summers are getting hotter. But the good news is your limestone paving should still remain comfortable to walk over all year round. However, you may want to consider grey or black jointing compounds, because lighter versions can turn green as a reaction to direct sunlight.

And, can it stain?

You do have to be a bit careful. Food and oil spillages can lead to staining. Plus this stone contains iron which can lead to staining over time due to rusting. Again, sealing will help by preventing liquid or dirt from penetrating the limestone and staining it. Additionally, a good upkeep regime helps stop moss or lichen stains.
If the worst does happen, clean with a water, bleach or detergent solution and use the right specialist cleaning products.

Here to help

Royal Stone Care can help keep your limestone paving in tip-top condition. And that’s the case wherever you are in the capital, and whether you’re a business or domestic customer. Talk to us today, whether you need limestone cleaning and repair in London.