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Can You Lay Block Paving On Top Of Concrete?

The replacement or improvement of your driveway is unarguably one of the most expensive projects you can undertake in the exterior of your home. When done by a true professional the results can be impressive and visually appealing, however you’d have to pay huge bucks to have this done. This is exactly the situation with block paving as it is not only time consuming, but also a lot more expensive when compared to other types of driveway.

A large chuck of this cost is associated with the removal of the existing driveway. So assuming your old driveway is concrete, can you simply pave over the existing concrete? If yes, will it save you money? The simple and short answer is yes. It’s in fact advisable to pave over concrete as this will not only add around 20% to your home’s value, but also make it look a lot more attractive and pleasing to the eye.

However, there are some problems associated with block paving over concrete. It may be better to remove the concrete in situations whereby the base is substandard. For instance, if the ground underneath the concrete is failing, there’ll most definitely be problems.

Also, there’ll be some issues with settling (not even the cracks). If your concrete is dropping little amounts every year, these can affect the blocks and ultimately lead to dropping of some sections of the block paving in such a way that they’ll no longer be on the same level as the other blocks. Giving a rise to the possibility of drainage issues, tripping hazard and lots more.

Other issues that may crop up can be triggered as a result of using the wrong size block height as well as totally ignoring or overlooking the undulations of the concrete.

How To Lay Block Paving

Do you wish to know how to install block paving? We’ve got you covered! Here, you’ll find a useful step by step guide that’ll provide you with all the necessary information to lay a wide range of block paving products available in the market today. You must, however, note that the installation of block paving can be a tricky affair and should not be attempted unless you have undergone a proper training or have a good experience in the field. If otherwise, we’d advise you to leave the task for a reliable block laying professional to guarantee the best results and also avoid making costly mistakes.

lDesign

• Draw up a design to perfectly suits your needs.

• Decide on the type of block as well as colour.

lExcavation

• Use a mini excavator or a JCB ( depending on the size of the job) to excavate the driveway.

• Identify and mark out the area to be excavated.

• Dug out the area until you reach a suitable level

• Ensure that the proposed finish level is 150mm underneath the damp proof course in any of the adjoining building’s brick.

lEdge Restraints

• Build a 100mm depth-thick concrete foundation with the help of a concrete mixer, 1 part cement and 6 parts ballast.

• Position the kerb unit on top of the level with a string line and spirit level.

• Use a trowel and rubber mallet to mortar the kerb unit to the foundation.

• Haunch the back of the kerb units in such a way that the concrete reach half way up the kerb’s rear.

lSubbase

• Put the crushed concrete in the edge restraints and ensure it’s at the desired level of 50mm.

• Use a vibrating plate to compact and level

lScreeding

• Apply a layer of sharp sand (to 50mm depth) and campact it using a vibrating plate.

• Apply second layer of sharp sand (to 20mm depth) on top of the first layer.

• Level the second layer to the correct falls.

lInstallation Of Paving

• Lay the block paving starting from the bottom of a slope.

• Ensure the blocks are placed at about 10mm to 15mm above the required finish level.

• Make sure the blocks used are between 3-5 packs as you proceed with your desired pattern. You may need to cut smaller block pieces to fill smaller gaps.

lFinishing Touches

• Clear out the area to ensure no debris is left on the blocks.

• Put kiln dried sand and brush across the whole of the area, ensuring the sands falls between the blocks’ joints.

• Compact the drive with the vibrating plate.

• Brush more kiln dried sand over the area and compact again

• Repeat the process until the joints are full of sand.

Clearing snow from a gravel driveway can be tricky – you need to remove the snow without taking the gravel with it.

If the snow’s quite light and dry, try using a leaf blower. You might find that this is enough to get the snow out the way. If it isn’t, start by using a shovel. Use this to clear the top layer of snow off your driveway, leaving about an inch behind. Then, use a rake to remove most of the remaining snow. This won’t take away 100% of the snow or leave all of your gravel in place, but it’s still pretty effective. You can then lay salt to melt away the rest of the snow and stop it turning into ice.

A resin bound driveway is made from resin and aggregates that are mixed together to create a smooth, flat surface. They’re often called ‘stone carpets’ because they offer a decorative finish that is durable and requires very little maintenance. It has lots of little gaps that allow water to drain into the ground, which means that you won’t get pooling or flooding around your property.

You can choose from lots of different colours and types of aggregate (stones) so that your resin bound driveway complements your property. Most contractors recommend choosing a darker aggregate because they are more resistant to the sun, but if you choose a good UV-resistant resin you should be able to have a lighter stone that doesn’t get too bleached by the sun.

To lay a resin bound driveway, resin and aggregates are mixed in a forced action mixer to create a mixture that a tradesperson will then pour and trowel onto a prepared base. It will become smooth once it’s cured, and the stones will all be contained, so you won’t have to spend time sweeping gravel back onto your driveway. The only maintenance that’s needed is to wash it with soapy water every now and again and sweep away any debris. Just make sure you don’t use chemicals or oils, as this might damage the coating.

Slab paving is a great material to use to create a sturdy shed base.

Start by measuring out the area where your shed is going to be. This needs to be the size of your shed, plus about 10-20cm extra each way. Mark it out with string and pegs, make sure it’s square, and dig it down to about 6cm deep.

Then create a sand and cement mixture and put a layer down, followed by your paving slabs. Make sure you start in one corner and use a rubber mallet and spirit level to make sure they’re as level as possible. Leave this to set and you’re ready to use your shed base.

Is Block Paving Permeable?

Back in 2008, there was a regulation introduced which comes with a requirement guiding the pavement of front gardens. It requires homeowners to incorporate the conventional impermeable driveways which makes for an uncontrolled run off of rainwater into sewers, roadways, local watercourses etc. However since then, new systems have been established which complies with the legislation and permit driveway laying of block paving without requiring planning permission while still providing the same visually appealing features as the conventional systems. Therefore, a short and simple answer to whether block paving is permeable is yes.

A permeable paving driveway (unlike the conventional ones which quickly diverts rainwater towards the edges to local drains) purposefully diverts rainwater into the built paving structure which oversees a controlled release of the rainwater into the environment. Permeable block paving comes with a wide range of benefits which includes the following:

• No Planning Permission Required

Unlike the traditional system, permeable block paving requires no planning permission as it oversees the driveway draining by ensuring that the surface water passes directly through the joints which makes sure the drains are not over worked and minimizing the risk of flood.

• Puddles Reduction By Natural Drainage

A permeable block paving minimizes puddles as well as standing water which helps to boost natural drainage. This is due to the laying process which features little voids that permits the passage of water.

• Natural Filtration

A natural filtration occurs when water is allowed to return to the ground by permeable block paving which helps assists in getting rid of any pollutants from the rain water.

• Flood Prevention

Permeable paving can help to prevent flooding as it absorbs water rather than directing it to the local drains or leaving it to build up on the surface’s top.

• Natural & Sustainable Materials

Natural and recyclable materials can be incorporated in producing permeable paving which is an excellent choice especially if you’re seeking a more sustainable driveway.

Weeds growing on your gravel can look unsightly, so it’s worth taking steps to stop them sprouting up.

When you lay your driveway, make sure you use a weed proof membrane. This will help to stop most growth, although it won’t totally prevent weeds occurring. For any other growth, dig the weed out or use a weed killer.

No, pattern imprinted concrete shouldn’t be slippery. Most good driveway installers will add a special anti-slip agent to the sealant before they brush it onto your driveway, so it will stop it from being slippery.

It’s important to ask a driveway company how they will seal your driveway when you get a quote from them. If an untrustworthy company seals your driveway badly, it can cause a thick and extremely slippery surface, so it’s vital that you ask any contractor what their procedure is before you engage them.

It’s also important to remember that pattern imprinted concrete isn’t a ‘non-slip’ surface – it’s just not slippery. You could still slip over on a concrete driveway, just like you could on tarmac or a block paved driveway. Also, once you’ve walked and driven over your driveway for a few months, its skid and slip resistance will increase as it weathers and builds up tiny specs of dirt on it. Pattern imprinted concrete is often used in high footfall areas in places like shops, fast food restaurants and theme parks, so if there was a significant slip risk these businesses wouldn’t use it.

You might think that you could ask your contractor not to seal the driveway to make it less slippery, but it could actually do the opposite. By sealing pattern imprinted concrete, it means that moss and algae is much less likely to grow, which can be extremely slippery to walk on if it’s left to its own devices. If moss does form on your driveway, the sealed surface is much easier to clean as you can simply pressure wash it away; this is not as easy to do on a non-sealed surface.