Permeable Pavers at Hort Park

In this post, we are highlighting the latest in our product range, permeable pavers.

For normal pavers, water runs on top of the paver, similar to a bitumen or tile installation. For permeable paving, the pavers are porous such that the water can flow directly into the sub base. Typically, there is a water retention tank or subsoil pipes to redirect the water into the drains. The pavers thus act as a second holding area for the water to prevent water ponding and secondary storage during the rainy season.

The link to the relevant brochure is here. It showcases the different types of permeable paving systems to ensure that the desired outcome is achieved.

We also have a fun video that highlights the effectiveness of the product compared to the typical paving installation.

Alternatively, a good resource for the latest news in permeable paving is via Interpave, the precast concrete paving and kerb association in the UK.

Permeable Pavers at Hort Park Dropoff Point 3

 


The installation for this project would have been fairly challenging for the following factors:

  • Uneven terrain
  • Weight of product (approximately 33kg per piece!)
  • Large size of product that requires special tools for cutting
  • The winding footpaths require constant adjustment to ensure that the installation remains straight.

The permeable pavers were chosen for this project to act as a secondary water storage for the several large storm drains directly outside the job site.

The design intent for this particular project was to use the large format pavers, which is only manufactured in 60mm thickness. Further, there is sufficient vehicular access as the driveways are right next to the footpaths so there is little to no possibility of vehicular access.

For most footpath installations, 60mm thickness is sufficient, especially if it is 99% unlikely to have vehicular traffic. For plazas and key hubs where there is a >10% chance of vehicular traffic (e.g. food trucks, dentist vans, popup shops), our recommendation is to use the 80mm thickness.

Typically, we use the small format permeable pavers in either Quadpave 100x200mm or Unipave 223x115mm for installations in Singapore. This ensures a much faster installation process as the individual pieces are much lighter (4-5kg). The installation is also more secure as the joints are not too large.  There is also opportunity for design flexibility either with use of different colours or with a cohesive design that flows through to the carparks and driveways as these sizes are available in 80mm and 100mm thickness.

Product Information
Product Name: Neupave
Product Shape: Prime Paver 60mm
Product Dimensions: 400x600mm
Product Weight: approximately 33kg per peice
Colours: Grey only

Interlocking Paving Dropoff Point and Driveway at Hotel

For the first post in 2017, we are reviewing a unique interlocking paving installation at a hotel in central Singapore!

We used a mix of Quadpave 200×100 in a rectangular shape and Prime Pave 200×200 in a square shape to create a tessellation or repeating pattern. The two main colours used here is grey and black. This is typical of installations looking to mimic the look of granite.

close-up-of-interlocking-paving-pattern

The picture above is a close up of the design using the grey Quadpave and the black Prime Paver.

driveway-with-grasspave-interlocking-paving-pattern

We also included the grasspave by the side of the driveway. This product is slightly different from the typical grass pavers seen at the carpark lot. Nevertheless, the functionality of the product remains the same, providing aeration to the ground below and a touch of green.

dropoff-porch-interlocking-paving-pattern-singapore

Interlocking Pavers at Sembawang HDB

We’re highlighting a unique HDB project with supply and install of interlocking pavers for the driveway, drop off points and pedestrian footpaths.

At BA Contracts, we provide supply and install for multiple HDB projects. Typically, these are the ones showcased in the main image, using Unipave 80mm in the standard colours of red, grey and black, . For larger projects, we provide design services to the client as well.

As the specialists in this segment, we are familiar with the typical HDB installation details such as the termination patterns at the kerb and manhole as well as carpark lot designs.

interlocking-paver-for-hdb-driveway

Details such as the linkway hump can be constructed using interlocking pavers as well. Usually, this requires the use of yellow interlocking pavers to provide the necessary contrasts. Based on the shop drawing, we will do the necessary works to create the linkway hump to match the overhead shelter. This can be constructed straight across or can be at an angle, depending on the direction of the overhead shelter.

interlocking-paver-for-linkway-hump

For this HDB project, we also provided the pavers for the sheltered walkways and external footpaths as per the consultant’s design specifications.

A mixture of grey and black square pavers was used for the foot paths and sheltered walkways. This provided a clean and coherent look, while differentiating the design from the vehicular driveways.

For walkways, 60mm thickness is sufficient to withstand the human traffic. As such the range of products available is wider, allowing consultants to create a unique feel for each project. For example, in the open area, we used the boomerang profile to create more texture in the design.

interlocking-paver-for-pedestrian-path square-paver-for-footpathboomerang-paver-for-footpathsquare-paver-for-sheltered-walkway

Interlocking Paver for School Project at Bukit Timah

We’re highlighting a recent school project where we provided rectification work for the interlocking paver due to the addition of a new building. During the construction process of the new building, the heavy vehicles damaged the existing interlocking blocks and required a new installation of the interlocking pavers.

The products used are Unipave 80mm, which is the most common interlocking paving shape found in Singapore. This is due to its ridges which provide the strongest interlocking properties. It is installed in a herringbone pattern to provide some visual interest in the design with grey and black outlines.

Typically, the pavers used for driveways are 80mm thick in order to withstand the load from the vehicular traffic. However, once installed, heavy vehicles such as skid loaders, boom lifts etc, should not enter the driveway. The 80mm interlocking paver is not made to withstand such heavy loads which will result in cracks and sunken areas. These heavy vehicles are also prone to oil spills, creating irreversible stains.

For carpark lots, we typically use the 100mm product to provide better support for the parked vehicle.

The products used in this project is the Unipave 80mm in the standard colours of Red, Grey and Black. The supporting photo highlights the termination pattern for the herringbone installation.

interlocking-paver-termination-to-drain

Permeable Paving Video

This is a great illustration of the benefits of permeable paving!

Permeable Paving is a great product for Sustainable Drainage Systems (SuDS). It addresses quantity by reducing and controlling the amount of runoff as well as quality by removing pollutants.

The video showcases the difference in the rate of runoff for the different types of pavers.

NeuPave vs Standard Paving – BA Contracts from Valerie on Vimeo.

This technology has been in use in the UK and Europe for the past decade and has enjoyed tremendous success in township developments and various educational institutes. It manages surface water close to where rainfall hits the ground, which is known as source control and is fundamental to SUDS philosophy. It helps to replicate green-field run-off characteristics from development sites as well as requiring no additional land take, which is particularly relevant for high density developments. Specifically, it can handle runoff from roof drainage and adjacent impermeable surfaces as well as rain falling on the permeable surface itself.

It minimizes potential water ponding issues regardless of the sub base used. Further, the different finishes allows for greater design flexibility in creating a built environment that looks natural.

Based on the CIRIA C609, 2004, the percentage removal of pollutants for permeable paving are:

  • total suspended solids: 60-95%
  • hydrocarbons: 70-90%
  • phosphorus: 50-80%
  • nitrogen: 65-80%
  • heavy metals: 60-95%

Further, based on the CIRIA C697, 2007, the water quality treatment potential

  • removal of total suspended solids: high
  • removal of heavy metals: high
  • removal of nutrients: high
  • removal of bacteria: high
  • treatment of suspended sediments & dissolved pollutants: high

As with most other interlocking paving installations, the maintenance requirements are very low. For permeable paving, there is minimal maintenance required. Experts project that there will be none for at least 5 years. Even if there is localised clogging, it is obvious and easily resolved by power washing.

For more information, please refer to our brochure here.