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CONSTRUCTION VARIATIONS
 Applications and Accessories
Fig. 1010
Drain set in poured roof deck slab. Flashing is secured by a non-puncturing flashing clamp.

Fig. 1010 (-C)
Drain with underdeck clamp -C used where roof drain openings are presleeved in the slab. Underdeck clamp provides positive anchoring of the drain body. May be used in any slab or deck. NOTE: Drain flange rests in a recessed portion of the deck, eliminating sump receiver.
Fig. 1015 (-R-C)
Drain with adjustable extension sleeve, sump receiver -R and underdeck clamp -C. Extension sleeve adjusts for any specified thickness of insulation required above the roof slab or deck. Removal of the extension sleeve permits roof drainage during construction.		 Fig. 1410
Promenade deck drain set in finished roof deck. The construction provides for waterproof flashing at the roof slab and topping of tile or any finished roof deck material.

Typical Roof Coupling Installation with Vandal Proof Vent Caps

 

IRMA SYSTEMS
(INSULATED ROOF MEMBRANE ASSEMBLY)
The "Insulated Roof Membrane Assembly" design turns conventional roofing upside down.

Conventional Roofing has the waterproof membrane (built-up felts and asphalt) as the top layer, exposed to all outside weather conditions. Insulation, when used, is installed under the membrane (directly on deck or structural slab). Thus, the membrane is continuously exposed to extremes of weather which severely test its performance and durability.

"Insulated Roof Membrane Assembly" (sometimes called "Inverted Membrane") places the waterproofing membrane directly on the structural deck. Rigid foam type insulation from 1" to 3" thick is placed over the membrane layer. A layer of crushed stone or a finished traffic deck is then installed over the insulation. The insulation, placed in this manner, insulates the building roof and also protects the membrane layer from weather and temperature extremes. Proponents state that the insulated roof membrane assembly prolongs roof life practically eliminating membrane failures.

Some insulated membrane systems use a liquid membrane instead of the built-up felt and asphalt type membrane. Since either of these two membrane materials may be specified, Smith offers a separate body design for each type.


Drain Figure Numbers and Application--For insulated membrane systems:
Built-Up Membrane Type

Uses conventional hot asphalt and felt layers which are clamped to the drain body with our conventional roof drain flashing clamp.

Smith figure numbers are:
Roof Drain - Fig. 1011 - This is similar to the regular Fig. 1010 drain and is regularly furnished with a 4" high perforated stainless steel gravel stop. (Also Fig. 1017)

Deck Drain - Fig. 1409 - This is similar to Fig. 1410 (-E) except a secondary clamping device and extension perforated with seepage holes, are regularly furnished.		 Liquid Membrane Type

A liquid membrane is a self-adhering liquid polymer which cures to a flexible rubber like seamless blanket. This material is not clamped to the drain body, but is bonded to a wide flange drain body.

Smith figure numbers are:
Roof Drain - Fig. 1019 - Body has a 20" diameter integral bonding flange to bond the liquid membrane. Drain is regularly furnished with a 4" perforated stainless steel gravel stop. (Also Fig. 1018)

Deck Drain - Fig. 1419 - Body has a 20" diameter integral bonding flange and is regularly furnished with a perforated extension with rows of seepage holes.
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