Item Brochure
9
The Universal Barrier size allows 6" to 8" (152mm-203mm)
clearance between the root ball and the wall of the barrier.
Do not use fewer panels than recommended above. To do
so would reduce clearance and may impede backfill, creat-
ing air pockets and limiting the effectiveness of the product.
We have shown the smallest sizes which will still avoid
hazard to tree health and survival consistent with the proper
function of the barrier.
When planting a tree over 24" (61cm) trunk caliper at
maturity, consult your local arborist.
T R E E O P E N I N G C A L C U L A T I O N S
In some situations the number of panels may be limited by
the size of the planting area (for example, a sidewalk cutout
that is surrounded on all four sides by hardscape). If there is
no design alternative to this difficult planting situation, we
recommend providing the tree with the maximum available
soil volume possible by lining the perimeter of the planting
hole with the barrier. The following guide will help deter-
mine the maximum number of panels that can comfortably
fit in a square cutout.
TO CALCULATE ThE NUMBER OF PANELS NEEDED:
Perimeter in feet minus 2 feet (61cm), divided by 2
Example: A 4' x 4' sidewalk cutout has an outside perimeter
of 16' (4' + 4' + 4' + 4'). Subtracting 2' leaves 14', divided
by 2 equals 7. This is the maximum number of panels that
will comfortably fit in a 4' x 4' planting zone.
Seven (7) panels of DeepRoot UB 18-2 or UB 24-2 with
a circumference of 151" (383.5 cm) fit into the square hole
to form an oval.
PRODUCT SELECTION FOR SURROUND PLANTING
TREE SIZE AT PLANTING TIME UNIVERSAL BARRIER
Caliper at Planting Gallons Ball & Burlap Box UB 18-2 UB 24-2 Diameter
1½"-2"
(38mm-51mm)
5-15
20"-24"
(51-61cm)
20"
(50.8cm)
5 Panels 5 Panels
38"
(96.5cm)
2½"-3"
(64mm-76mm)
15
28"-32"
(71-81cm)
20" & 24"
(51 & 61cm)
6 Panels
45"
(114.5cm)
3½"
(89mm)
38"
(96.5cm)
30"
(76cm)
7 Panels
52"
(132cm)
4-4½"
(102mm-114mm)
42"-48"
(107-122cm)
36"
(91cm)
8 Panels
61"
(155cm)
DN
DN
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