AZEK Pavers - Manual (Page 19)

Page 19
Installation Instructions -
Permeable
Landscape
Each permeable application is different, and there are multiple
considerations that must be taken into account (e.g. amount of rainwater,
runoff water from hills and downspouts, soil type, the infiltration rate of the
pavers).
A permeable base is typically comprised of multiple layers of different
sized fractured-face stones. The base material should be an open-graded
aggregate, free from sands and other small particles. Please refer to local
requirements and specifications, or visit ICPI.org for more information.
Here is a generic permeable base found on the ICPI website.
The base material needs to be compacted every 2" as it is spread out. This
will reduce any chance of the base material settling over time making the
installation uneven. Additional resources for base design can be found at
www.icpi.org
Slope:
It is very important to slope the sub base (ground beneath the permeable
base material) away from any building structures or foundations. The typical
slope is approximately 1 inch over 6 feet.
PERMEABLE BASE MATERIAL
1
IMPORTANT:
A civil engineer,
landscape
professional,
or local
municipality, is
recommended
to design the
appropriate
permeable base.
2
INSTALL BASE MATERIALS
Install and Compact Base:
• Add base material 2" at a time.
• Compact each layer completely with a plate compactor or hand tamper.
• Compact to 95% proctor density (ASTM D 698).
• Be sure to compact all edges and corners thoroughly as these are at the
most risk to degradation.
• Limit any undulations to under 1/4" to limit any dips or humps in the final
installation.
Install, Compact, and Level Bedding Layer:
• Add a 1-1/2" to 2" layer of chip rock (3/8" clean, fractured-face rock or
No.8 stone)
• Level the bedding layer appropriately and tamp with a hand tamper or
vibratory plate compactor.
• Add chip rock to areas that are uneven and smooth them out.
• Refer back to page 7 for laying of AZEK Pavers.
Top Layer (3/8" chip rock or No. 8 stone) 2 inches
Middle Layer (1" stone or No. 57 stone) 4 inches
Bottom Layer (2.5" stone or No. 2 stone) 6+ inches
* Geotextile fabric optional between sub-base and bottom layer