Frost Brochure Issue 03 - Catalog - Page 65
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Roof Drains - Design Considerations
Cold Roof Assembly
Membrane
clamping collar
Secured circular
grating
Body
Membrane
Roof slab
Spigot adaptor
Warm Roof Assembly
Membrane
clamping collar
Secured dome
Body
Membrane
The primary purpose of any roof
drainage system is to remove water
from roofs as quickly as possible in a
controlled and predictable way.
Factors including roof outlet size,
shape, appearance and anticipated
drainage requirements need to be
taken into account. Design is usually
the responsibility of consulting
engineers familiar with the roof
construction, piping systems and
additional functions intended for
particular roofs.
Insulation
Roof slab
Body
Membrane
clamping collar
Spigot adaptor
Inverted Roof Assembly
Membrane
clamping collar
Secured dome
Gravel guard
Body
International regulations and local
building codes must be observed for
all drainage installations. Local rainfall
rates should be taken into account.
Roof finish
Membrane
Insulation
Screed
Roof slab
Spigot adaptor
Parapet Roof Assembly
Membrane
Connecting
spigot
Grating
Membrane clamp
Downspout
nozzle
Deck
Body
BUILDING REGULATIONS /
STANDARDS
ROOF CONSTRUCTION
Roof outlets are not multi-purpose
and products are designed for
use with specific types of roof
construction (e.g. cold roof, warm
roof, inverted roof parapet roof and
balconies). The depth of structural
slab, thickness and location of
insulation and the type and location
of waterproof membrane are factors
to consider at the outset of any
drainage selection.
Parapet wall
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