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How To Repair Sunken Concrete Driveway

If you have concrete driveway that’s cracked, uneven and mostly especially sunken, you’d know how distasteful it can be just viewing it on your property. A sunken concrete driveway is most likely caused by rainwater erosion removing the soil under it or a big root under it which as rotted over time. Another possible cause of the sunken concrete is an improperly prepared base which implies that the soil beneath wasn’t fully compact when the concrete was poured on it. Later on the soil beneath will eventually settle and shift below the concrete driveway which weakens the integrity of the entire driveway, making it more vulnerable to cracks, unevenness and sunken.

Two ways in which you can fix this problem includes either demolishing the whole driveway, re-compact the soil underneath and fill with new concrete or repair the entire driveway using an easy process called slabjacking. In this article, we’re going to look at the slabjacking repair process as it’s significantly less expensive than the demolishing approach and will also cause minimal disruption to your lifestyle.

Also referred to as mudjacking or concrete lifting, slabjacking is simply a process used to float your existing concrete back to its original position. If you are not a competent DIYer or lack confidence to pull this off, we’d recommend reach out to a professional for help. If otherwise, then you can practice the slabjacking process given below.

✓ Drill holes through the slab.

✓ Pump grout mixture through the holes. This mixture will spread out beneath he driveway and raise it up.

✓ Lastly, fill the holes and level the concrete driveway surface.in such a way to hide the signs of the repair made.

This is a process that works to efficiently get your driveway back in a top condition relatively quickly.

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.

1. Prepare the sub-baseThe driveway company will excavate, or dig, the existing surface down to a depth of around 200mm. They will remove any debris from the area may place it in a skip or arrange for it to be removed in another way. When they dig down to the sub-base of your previous driveway, they will assess how much hardcore they need and arrange for that to be delivered to the site. They will then spread the hardcore across the sub-base to create a level surface to pour the concrete on. Most good contractors will apply a gel to any walls and doors to protect them from concrete splashes. They will also add any gulley tops, manhole covers or shuttering that’s required.
2. Installation and imprintingNext, the tradespeople will have the concrete either poured from a large mixer vehicle or barrow it in from a mixer and pour onto the surface. They level it with rakes, then add a colour surface hardener in a colour of your choice. This will give the driveway its permanent colour. They will then wait until the concrete has hardened to the correct consistency for imprinting the pattern, then will use special tools and stencils to make the pattern that you asked for. They will then spread a colour powder called a release agent over the surface, and leave to dry for 1 to 2 days depending on the weather conditions.
3. CleaningWhen the contractors return, they will add crack control cuts into the concrete. This is important because concrete expands and contracts in the heat, so there needs to be some give to stop any larger cracks from forming. Then everything is power washed clean, and a chemical wash is also used on the concrete to ensure it’s completely dust-free. The installers will ensure all your walls and doors are clean, which will hopefully be an easy job if they used wall gel.
4. SealingThe final step is to seal the driveway. There needs to have been at least two dry days before the tradespeople can do it, so you might find it’s best to have your pattern imprinted driveway installed in the summer. The contractors will blow any debris away from the surface and dry any damp areas where necessary. They will then add an anti-slip agent to the sealant and brush it on. It’s best to not walk or drive onto your new concrete driveway for about 4 days after sealing to allow everything to set. But after that, you’re ready to use your new driveway!

Cleaning block paving is a fairly straightforward task, although you’ll want to be careful to not use any chemicals that may cause damage to the surface. Use a simple household soap, mixed with water, and brush this across the paving with a stiff brush. Then, simply rinse off with clean water. Alternatively, use a pressure washer – but be careful not to use it on a powerful setting, as this may damage the joints and can cause slabs to come loose. Using the pressure washer on a medium setting and at a 45 degree angle is recommended.

The most commonly used driveway surfacing materials are gravel, asphalt, concrete and paving - which can be block, slabbed or patten imprinted. Take a look at our product information pages to help you decide which one to use and which one will look best for your driveway.

Patios use durable and hard wearing materials which will be able to withstand extreme weather. It’s important to consider the drainage of your patio, as heavy rain will need to drain away to an area that can absorb the water. A professional will be able to design and lay a patio to do this.

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.

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.