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Full
Taper Systems
Ideal for roofs without a structural slope. Full Taper Systems can
be designed to offer varying degrees of drainage. Most often used
in retrofit applications and for roofs in new construction where structural
slope is not possible. Key considerations for Full Taper Systems are
reduced life cycle costs, R-value and perimeter height restrictions.
Common slopes used are 1% and 2%.
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Perimeter
Taper Systems
Economical method to shed water away from critical areas at parapets,
walls, mechanical units, etc. The majority of roof leak problems occur
at vertical penetrations of the roof system so it is vital to shed
water from these zones. Consider widths between 4' and 16' with minimum
slope of 2%, for Perimeter Taper Systems.
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Backslope
Taper Systems
Used in conjunction with 1 way structural slopes to create a backslope
to divert water back to drains from the low side of the structural
framing. This use allows for simplified structural framing layouts
and methods. Design with consideration of doubling the structural
deck slope for the backslope insulation slope. Consider keeping the
roof drains closer to low side of structure - ideally 4" to 8"
out.
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Cricket
Taper Systems
Used to complement tapered insulation and structural slope systems.
Placement in common valleys between drains is an effective use of
crickets. Other uses include locating crickets at high side of all
roof top units, etc - to divert water around obstructions (i.e. chimney
crickets). Also, custom designed crickets can be used to correct differential
heights of adjacent roof decks- common with core-slab systems or with
additions to existing buildings. Common slope is 4% or double the
deck slope.
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Drain
Sumps
Key component of any roof drainage strategy.
Roof drains often sit a bit higher than the adjacent roof area due
to the flange and plies of membrane. Sumps lower the elevation of
the drain and eliminate ponding due to high drain location. Sumps
alone in a flat roof can dramatically reduce the amount of standing
water on a roof. Common sumps sizes are 4'x4', 8'x8'and 16'x16'. The
sump thickness should match the baselayer thickness and then allow
for a slope of at least 1" fall. |
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Torchable
Cant Stripping
Well suited for roofing specs which require torching
of the perimeter flashing over a 45-degree transition. Cants are available
in 3"x3", 4"x4" and 6"x6"sizes. |
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Deck
Deflection Leveler Systems
Custom designed to meet specific needs. Many
steel, concrete and wood roof decks exhibit some degree of deck
deflection over their spans which leads to standing water. The roof
is checked for level and areas of deflection. Solutions can vary
from simple backslope taper systems to components integrated with
a full taper system to level out any deflections.
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