Find a Driveway Installer you can trust in Chalfont St Giles.

Tarmac is a material made up of broken stone and tar, used for surfacing roads, driveways and other outdoor areas. It’s actually a registered product trademark, but many people use ‘tarmac’ interchangeably with ‘asphalt’. Asphalt is similar to tarmac, but is now more commonly used, and is made from bitumen instead of tar.

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.

It’s up to you what size gravel you use for your driveway, but there are some guidelines that are worth following. If you go too small, your gravel will get displaced easily. But, if you go too big, you driveway might be quite tricky to walk on. Generally, it’s a good idea to go for a gravel size somewhere between 10-20mm.

Removing oil from block paving can be tricky, and a professional clean and re-point is often the best option. However, for small stains, especially recent ones, it’s worth attempting to clean it yourself. To do this, you can purchase oil remover or driveway cleaning solutions – although be careful, as some may stain or mark certain kinds of paving stones. In general, stay away from acid based cleaners.

To inexperienced people laying of paving slab isn’t much more than digging a little, purchasing little amount of mortar and pressing down the paving slabs. But how good would it have been if only it were that easy in real life? The truth is, in reality, laying paving slabs does not only require you to prepare your sub-base painstakingly and mix your mortar using the appropriate materials, but you’d also have to work with accurate and precise paver placements to guarantee the patio’s longevity. As a result, if you lack proper training or experience, we’d recommend you hire the services of a seasoned professional who can guarantee the best results and also save you time and extra cash that may result from possible costly errors. In this guide, you’d gain more insight into the paving slabs laying process.

To get started, you’ll need sharp sand, cement, shovel, wheelbarrow, pointing trowel, rubber mallet, spirit level, jointing compound, hard-bristled brush and tarpaulin.

• Mix a layer of mortar for each paver.

• Apply the mixed mortar onto the sub base by using the trowel.

• Slot the first flag in place and ensure not to stain the paver’s surface with the mixed mortar.

• Using a rubber mallet, carefully tap the paver to the mortar bed. Once done, ensure the surface is even with a spirit level.

• Take a measurement of the gap between the pavers

• Repeat the above steps until all pavers have been perfectly laid

• Leave the pavers to dry for about 1 to 2 days. You can protect it using a tarpaulin if concerned about rain.

• Use the jointing compound to fill up the paver gaps to bind together the pavers. Ensure to wipe off any excess compound using the hard bristled brush.

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.

Driveway work is usually done in the warmer half of the year. This is partly to avoid bad weather. If you want to get ahead and avoid waiting for a contractor to be free, you should try getting in touch with a professional in the early spring so a date can be booked for install as soon as practically possible.

Driveway surfacing materials like concrete, asphalt and clay brick usually crack because they’ve been exposed to extreme temperatures or put under high pressure. It’s important to repair driveway cracks before they get worse and cause damage to vehicles and perhaps others to trip on raised cracks.