Tuesday, October 28, 2014

Paver Installation

One of our most popular projects is pavers-- and for good reason! Pavers often come with a a lifetime warranty, they are durable and when installed correctly can last for a very long time. When we install pavers, we follow ICPI standards and this is the process we use:

01_install

PLANNING

Determine the area to be paved. Measure for square footage and sketch a diagram of the shape & pattern of paving stone desired.
02_install

PREPARING / EXCAVATING

Before beginning excavation, make sure there are no utility lines within the area to be paved. Excavate area to the proper depth depending on the type of traffic. Refer to cross section diagram.
03_install

ALLOW FOR DRAINAGE
 
Establish the finish grade and slope or pitch of pavement to allow for drainage. Lay out the lines and corners with string line and stakes. Compact sub-base with mechanical compactor.
04_install

BASE INSTALLATION

Spread aggregate base uniformly throughout the entire excavated area and 8 in. beyond perimeter lines. Base aggregate material should be processed 3/4” minus gravel or crushed concrete blend.
05_install

BASE COMPACTION

Compact the base aggregate evenly throughout the area with a mechanical plate compactor. Do not compact the base aggregate in more than 4” layers. The compacted base should conform to the contour of the finished paved area. The grade of the base aggregate should be 3” to 4” below the finished paving stone surface depending on the thickness of the paver.
06_install

SAND SCREEDING

Spread 1” of concrete sand evenly over the compacted base. Screed the bedding sand to a level, smooth surface using a screed board.  For areas wider than the width of the screed board, use 1” conduit pipe as screed guides 4’ apart. Screed sand, remove screed rails & fill in depressions with fresh sand. You should end up with a complete layer of smooth sand.  Do not disturb sand bed after it has been screeded.

07_install

EDGE RESTRAINTS

Install edge restraints as required. Pavers butting against curbs or foundations will not need an edge restraint. Various types of edging materials can be used. Nicolock recommends a Snap Edge edge restraint system since it is easy to install and will not rot or decay.

08_install
PAVER PLACEMENT.
Begin placing paving stones on the screeded sand bed in the desired pattern. Hand place the paving stones with a hand tight joint.  Work from the paving stone side of the installation as they are set. To achieve the best mixture of colors and blends, remove pavers from delivered bundles section by section, not layer by layer, and work from several bundles at a time. Cut pieces as needed to fill in the pattern.
FINISHING.
When all pavers are placed, sweep surface clean. Spread a fine jointing sand over the entire surface and broom sweep to fill all joints.  Leaving excess sand on the paving stone surface, tamp the paving stones into the setting bed with the mechanical plate compactor with a rubber pad. Broom sweep more sand to fill any open joints.  Backfill over the top edge restraint and grade. Your installation is complete and ready for use.
Note: Concrete dust created by saw cutting pavers can stain the surface. Be sure to cut pavers away from your installation. The use of an approved safety mask is recommended when cutting any concrete products.

Source: http://www.nicolock.com/homeowner-tools/installation/paving-stone-installation

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