Upon making contact with us, we will arrange for a convenient time that suits you to conduct a full site survey of the existing driveway and surrounding grounds.
Our driveway expert will discuss in detail your requirements to ensure your vision is realised. We’ll discuss design details and help you to consider the various types of block paving that will enhance your property and its surroundings.
We’ll also look at technical things such as falls and levels and assess whether drainage will be required to ensure it is compliant with regulations.
A full written no obligation quotation and works schedule will be provided.
The first stage of the construction process is to carefully excavate the existing driveway. Depending upon the thickness of the chosen block paving, this typically means excavating to a depth of 230mm below the finished height of the new driveway. This allows for 150mm of MOT Type 1 to form the sub-base, followed by a 30mm compacted sharp sand laying course onto which block paving is laid.
Excavated materials are usually removed from the site using a grab lorry. The HIAB crane of a grab lorry can quickly and easily remove large amounts of excavated material quickly and efficiently. The material is often recycled to create crushed concrete or topsoil to prevent the unnecessary filling of landfill sites.
A weed membrane is employed to stabilise the ground and prevent the contamination of the existing sub-grade. As the name suggests, the weed membrane also prevents weeds from growing through your driveway whilst allowing water to pass through the membrane to the sub-grade below.
A sub-base consisting of MOT Type 1 granite is installed to a minimum depth of 150mm. Layers of no more than 75mm are individually laid, compacted and levelled to ensure proper compaction of the sub-base.
For large areas or where heavy vehicular access is required, a vibrating roller is used to ensure adequate compaction.
Edge restraints act as a frame for your driveway and are set on a bed of concrete to prevent lateral movement or the rotation of the blocks under load. The edge restraint also provides a retaining edge for the compacted sharp sand laying course.
To ensure that your driveway complies with the SUDS (sustainable drainage system) legislation, linear drainage systems and/or soakaways may need to be installed depending upon site conditions. A properly designed drainage system will provide effective management of surface water run-off.
Where necessary, existing manholes are replaced with galvanised recessed manhole covers. These covers allow for block paving to be installed directly into the manhole cover continuing the pattern of the surrounding paving. This helps the manholes to blend seamlessly into the driveway whilst still allowing access using the concealed lifting handles.
The laying course material will consist of 30mm of well-graded sharp (grit) sand to comply with the grading given in BS7533:Part 3:2005. The laying course is screeded and then compacted to create a smooth, even and flowing surface on which to lay the blocks.
Once the laying course has been prepared, the block paving can be laid to the chosen pattern directly onto the compacted sand. If you have had multiple packs delivered to site, it’s vital that you take blocks evenly from all packs as you go. This ensures that the colours of the blocks blend in seamlessly as it is possible for slight variations in colour from pack to pack.
Necessary cuts are carried out using a cut-off saw or grinder.
Once the driveway has been laid, a vibrating plate compactor is run over the entire area to compact the driveway.
Once all the cutting-in has been completed, and the compliance checks carried out, a fine dry sand, known as ‘kiln-dried sand is used to fill the joints. The sand locks together the blocks of the driveway. We recommend using weed-free joining sand as it helps to prevent weed growth on your new driveway.
The blocks are then compacted a final time using a vibration plate to complete the installation.
The jointing sand may settle over the first few weeks and should be topped up as soon as this becomes apparent. A supply of jointing sand will be supplied for your convenience.
A final tidy of the site is carried out and your new driveway can be used immediately.