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Before the first shovel of dirt is turned, you need to estimate
the amount of materials needed for your Willow Creek Paving
Stones project. Five components are required: Paving stones,
aggregate base material, bedding sand, joint sand and edge restraints.
Please read all instructions to identify any optional components
you desire. Click
here for the full printable PDF Installation and Estimating
Guidelines document.
WILLOW CREEK PAVING STONES
Layout your plan on a worksheet grid and calculate
the square footage of the project area to be covered
with pavers. Use the estimating guides for the appropriate
pattern to determine how many paving stones are needed.
Brickstone Estimating
Guide, Cobblestone
Estimating Guide,
Circlestone
Estimating Guide,
Bullnose
Estimating Guide. Ledgestone Estimating
Guide is included in the
Ledgestone Installation Guide.
AGGREGATE BASE
The base is the most critical factor in establishing
a long-lasting paver surface. Base material should
be 3/4-inch crushed stone (including finer
particles) typically used for road base. The amount
of base material needed depends on the intended use
of the project area. Pedestrian and light vehicular
traffic requires 4-8 inches of base; heavy vehicular
traffic requires 8-12 inches. Do not use less base
than is required for the intended use of the paved
area. Insufficient base may cause irregularities in
your paved surface over the long term.
To calculate the volume of base needed, extend the
project area boundaries by a distance equal to the
depth of base required. For example, if 6 inches of
base is required for a pedestrian only sidewalk,
extend the project area by 6 inches in all
directions.
BEDDING SAND
A 1-inch layer of bedding sand provides the
final leveling surface into which the pavers will be
partially embedded. Bedding sand should be coarse,
washed sand suitable for masonry.
JOINT SAND
Joint sand is swept and compacted into paver
joints to securely interlock pavers. Joint sand
should be dry, washed sand, free of large aggregate
that would prevent it from flowing freely into
joints. The amount of joint sand required depends on
the shape of the pavers and the width of the joints.
In general, 1 cubic yard of joint sand will cover
3,600 square feet of paver
surface; a 66-pound bag of polymeric sand will cover
approximately 72 square feet of paver surface.
EDGE RESTRAINTS
Edge restraints prevent lateral movement of the
pavers and help ensure the structural integrity of
the paved surface. To calculate the number of 8-foot
edge restraints needed, measure
the perimeter of the project area in feet, subtract
any existing edge (foundation, curbs, stairs) and
divide by 8 feet. A minimum of one 3/8" x 10"
landscaping spike also is required for every 12
inches of edge restraint.
CALCULATIONS
AGGREGATE BASE
Cubic yards of aggregate base
Total extended project area (s.f.) =___ x base
thickness (feet) =___ ÷27 =___cubic yards.
BEDDING SAND
Total project area (s.f.) x .08 ft (1") =___ ÷ 27
=____ cubic yards.
JOINT SAND
Cubic yards of joint sand: Project area (square
feet) ÷ 3,600 =____ cubic yards.
EDGE RESTRAINTS
Project perimeter (feet) ÷ 8 ft. =____ pieces.
UNDERLAYMENT FABRIC
Total extended project area (s.f.) + enough fabric
to cover all vertical sides of the excavated area.
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