Marshalls Priora Permeable Block Paving a Sustainable Urban Drainage (SUDS) System

Priora Permeable Paving, a Sustainable Urban Drainage (SUDS) System for driveways. It's a Block Paving driveway paving system that enables rainfall to soak into the subsoil where it can drain harmlessly away rather than into hard pressed drains.


 


Priora Permeable Block Paving


Priora Permeable Paving, a Sustainable Urban Drainage (SUDS) System for driveways

The unique patented Priora block allows surface water to pass
through into a specially calculated sub base material without
compromising the structural performance of the driveway

The use of SUDS can reduce the risks of flooding and pollution of
the public sewer system especially in times of heavy rainfall

Priora block paving is available in six colours from our popular
Driveline 50 block paving range. Tegula Priora is a more rustic
version available in the three Drivesett Tegula colours

IMPORTANT Installation Note:
The Priora System should not be attempted by the DIY enthusiast
or untrained installer. It requires the careful calculation of a soil
permeability test and appropriate use of specially graded sub-base
aggregates.

Marshalls domestic Priora system must be laid on a sub-grade which has previously had an established and adequate existing driveway and an area which has a sub-grade soil strength greater than 5% and should be laid with a 20mm and 6mm washed, graded, angular aggregate to BSEN12620, to ensure compliance.

Marshalls domestic Priora system must be laid on a sub-grade which has previously had an established and adequate existing driveway


Priora Permeable Paving is available in 9 different colours, six colours are from the popular Driveline 50 block paving range and the Tegula Priora is a more rustic version available in the three Drivesett Tegula colours

Priora Permeable Bracken Block Paving
Priora Permeable Brindle Block Paving
Priora Bracken
Priora Brindle
Priora Permeable Buff Block Paving
Priora Permeable Burnt Ochre Block Paving
Priora Buff
Priora Burnt ochre
Priora Permeable Red Block Paving
Priora Permeable Charcoal Block Paving
Priora Red
Priora Charcoal
Priora Permeable harvest Block Paving
Priora Permeable Traditional Block Paving
Priora Harvest
Priora Traditional

Priora Pennant Grey

Conditions required for Priora

The grade of Priora featured in this brochure is only intended for normal domestic vehicles and pedestrian traffic, though occasional delivery vehicles over 3.5tonnes gross weight can be tolerated.

The domestic Priora System is only intended for driveways or paths where infiltration is required only in the immediate Priora paved area and not from other surrounding paved or roofed areas (see rain water catchment area guideline below)

In some parts of the country there are ground conditions where infiltration could adversely affect foundations to houses, therefore, if in doubt seek advice from a specialist or the local authority building control department.

Properties constructed pre 1920 may not have been built on traditional concrete foundation, therefore, if this is proved to be correct during excavation then Marshalls Domestic Priora system should not be installed.
Check for services, Priora must not be installed if gas or electric services run through intended Priora areas.

Guidelines for Installing Marshalls Priora Permeable Block Paving

Surface Gradient
The intended Priora area must fall away from the owner’s house and any other buildings in the immediate vicinity.
If the driveway exceeds 20m in length and/or has a gradient greater than 1 in 100 then please contact Marshalls Technical Advisory Service.

The top surface of the driveway should finish at least 150mm below any adjoining wall DPC level.

Existing Foundations
If your house lies adjacent to or less than 600mm from the proposed Domestic Priora driveway area, establish depth of house foundation before undertaking any soil test/Priora installation.

The house foundation top surface must be 600mm (minimum) below the finished level of the top of the proposed Priora driveway.

Soil Strength and Permeability
Marshalls Domestic Priora system must be laid on a subgrade which has previously had an established and adequate existing driveway and an area which has a subgrade soil strength greater than 5%.

The Domestic Priora system is only suitable for soil areas where infiltration applies and the test criteria have been met as per the standard permeability test.

For the standard permeability a test hole should be dug for every 20m2 of driveway. There should be a minimum of two holes. Holes/pits should be spaced evenly in relation to the proposed Priora area.

Discharge onto Roadway
The Domestic Priora area must not discharge onto surrounding public roadway and pathways and towards any buildings.

Rain Water Catchment Area

No adjoining surface areas (rainwater pipes, roof areas etc) must drain onto and into the proposed Domestic Priora driveway area, however, small areas such as door steps and garage areas are acceptable providing they do not exceed 5% of the driveway area.
Guideline: Catchment area = driveway area
Catchment area = drained surface area

Aggregates
Priora must be laid with 20mm and 6mm washed graded angular
aggregate to BS EN12620 to ensure compliance.

Trees
When installing in close proximity to existing trees, tree roots smaller than 25mm diameter may be pruned back, preferably to a side branch, using a suitable pair of secateurs or hand saw.

Roots
larger than 25mm should only be severed following consultation with an arboriculturist, as they may be essential to the tree’s health and stability.

Protection of the pavement will also be required, hence the requirement of a permeable root barrier system such as the Geoweb bio barrier system or similar which is non surface protruding, and therefore, does not present a trip hazard once installed.

Health and Safety
It is possible that more excavation for a Priora driveway may be required than that of a driveway constructed of traditional block paving, therefore, care must be taken when excavating ground to a deeper level.

Particular care must be taken to protect the sites from children and partially sighted persons and for collapse of adjoining features such as boundary walls/fences.

Check for services, Priora must not be installed if gas or electric services run through intended Priora areas.

Care must be taken when constructing over Sewer, rainwater pipes and water pipes to ensure that the services remain supported for their full length by undisturbed material and are surrounded on the remaining sides by a minimum of 150mm of 6mm material to protect the service.


We install the full range of block paving and landscaping products manufactured and supplied by Marshalls if you can't see what your looking for please do not hesitate to contact us