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Modern Pergola Installation Guide
STEP 2 – INSTALL POST MOUNTS
a) Mount to Deck
(Figure 2a)
a.
Add blocking below
deck flooring under each
post mount. Minimum
blocking thickness of 3"
(this is two 2x10’s thick)
b.
Inset mount as necessary to
ensure the base of post does
not overhang edge of decking.
i.
For standard kits (no post
skirt), inset a minimum 1"
from deck edge to edge
of post mounting plate.
ii.
For kits with post skirt (10 ½"
square) – inset a minimum
3" from deck edge to edge
of post mounting plate.
c.
Detail on nailing blocking –
Minimum 4 nails on
each side of 2by block
d.
Mount Fasteners – Carriage
Bolts or ledger attachment
screws (5" or greater)
e.
Use composite shims as
necessary to plumb mount.
Tighten fasteners.
b) Mount to Concrete
Slab or Landscape
Column Top
(Figure 2b)
a.
NOTE:
For a poured concrete
slab or patio, make sure
concrete is in good repair
For a landscape column we
recommend a one-piece cap
of concrete or natural stone
(4000 psi or greater), minimum
thickness 2.25". It is important
that the post is constructed
on a sound foundation. For
a compacted gravel base,
this means a minimum two
courses below grade. For a
concrete base, be sure to attach
footing to base course with
the recommended amount
of landscape adhesive. For
construction of post, we
recommend either masonry
or a high-quality concrete
product installed with a quality
brand of landscape adhesive.
In the case of adhesive, follow
manufacturer’s instructions.
For added strength you
can also fill the pillar(s)
with concrete or mortar to
add weight and rigidity.
b.
Inset mount as necessary to
ensure the base of post does
not overhang edge of concrete.
i.
For standard kits (no post
skirt), inset a minimum 3"
from edge of mounting
surface to edge of post
mounting plate.
ii.
For kits with post skirt
(10 ½" square)– inset a
minimum 3" from edge of
mounting surface to edge
of post mounting plate.
Minimum
4 Nails
per Joist
2"x10" (TYP)
BLOCKING
JO
IS
T
JO
IS
T
7"sq. Vinyl Post
Aluminum Post Mount
Aluminum Plate
1/2"x6" sq.
Carriage Bolt or Ledger Screw (4)
(not included)
Post Mount Standoff
BLOCKING
FLOORING
Figure 2a
7"sq. Vinyl Post
Aluminum Post Mount
Aluminum Plate
½"x6" sq.
Concrete Anchor (4)
(not included)
CONCRETE SLAB OR
LANDSCAPE COLUMN TOP
Post Mount Standoff
Figure 2b
