Porous Paving Maintenance
Stormflow Surfacing is a unique material when compared to traditional surfacing materials such as Porous Concrete and Porous Asphalt. Stormflow Surfacing, because it is flexible, moves when walked on or driven on and makes for a crack resistant driveway. This movement helps to work the fine particles thru the material and into the substrate. It also has a much large void space than other similar materials. Stormflow Surfacing has a typical void space of 29% allowing fines to pass through or to be vacuumed out quite easy.
Since Stormflow Surfacing is made from recycled rubber granules and aggregate, it remains flexible in nature unlike the previously mentioned products which have a “fixed void” once they are cured. A “fixed void” is one that is hardened allowing pockets where sediment can become trapped and difficult to clean.
Low Pressure Water Application
In the event that Stormflow Surfacing material becomes clogged with silt or sand, large amounts of water can be applied at low pressure to wash the fines through the Stormflow Surfacing into the sub base material. This process ensures that the obstructing particles are seamlessly transported into the underlying sub-base material, restoring the optimal permeability and drainage performance of the surface.
Vacuuming or Sweeping
A common shop vac can be used for smaller areas up to a street sweeper for large areas to extract the fines. Testing has shown that the vacuum method can remove not only the sediment in the Stormflow Surfacing but actually remove fines from the sub base as well. It is recommended that method #2 is used consistently or at least periodically in conjunction with method #1 to prevent build up in the sub base.
Other regular maintenance includes blowing leaves, sticks, grass clippings and other debris from the surface of the Stormflow Surfacing. This will help prevent breakdown of this debris preventing it from becoming trapped within the Porous Pavement. This is most commonly done by traditional leaf blower type equipment.
Stormflow Surfacing that is installed adjacent to gravel drives or areas where stones will likely be carried onto the surface should have regular cleaning. Regular inspection and maintenance of the Stormflow Surfacing installations will help in prolonging both the porosity and the longevity of the installation.