Description:
This roofing assembly consist of EPDM (ethylene propylene diene terpolymer) single-ply rubber membrane fully bonded with bonding adhesives over Polyiso insulation foam board fixed over sloped concrete deck or over metal deck with cover boards.
Features and Benefits:
■ EPDM Characteristics contributes to this superior overall system performance include;
- Cyclical membrane fatigue resistance.
- High resistance to ozone, weathering and abrasion.
- High flexibility.
- Superior resistance to extreme heat and fire.
- Thermal shock durability.
- Ultraviolet radiation resistance.
■ The Polyiso insulation foam board provides the highest Rvalue per inch.
The Polyiso insulation foam board is environmentally friendly.
Installation Guidelines:
Insulation, Underlayment, Placement and Attachment:
Clean the substrate from loose debris. Make sure that substrate conforms to the project requirements.
Do not install more insulation/underlayment that cannot be covered by membrane in the same day.
Install insulation board's underlayment over the concrete deck, insulation boards must be staggered and butted tightly together with no joints or gaps greater than1/4 inch.
Secure all insulation boards to the metal deck or concrete deck using Adhesives or Fasteners & Insulation Fastening Plates ensuring that fasteners are secured to the concrete deck in accordance with the manufacturer's requirements and approved shop drawings.
Membrane Placement and Bonding:
Unroll and position with stretching. Allow the membrane to relax for approximately hour before bonding. Fold the sheet back onto itself so half the underside of the membrane is exposed.
Apply the bonding adhesive to both the underside of the membrane and the substrate. Allow the adhesive to dry until it is tacky but will not string or stick to a dry finger touch.
Roll the coated membrane into the coated substrate while avoiding wrinkles. Brush down the bonded half of the membrane sheet with a soft bristle push broom to achieve maximum contact.
Fold back the unbonded half of the membrane sheet and repeat the bonding procedure.
Install adjoining membrane sheets in the same manner, overlapping edges approximately 4 inches. Do not apply bonding adhesive to the splice area.
Membrane Splicing:
Position membrane sheet to allow for required splice overlap. Mark the bottom sheets with an indelible marker approximately %” to f4” from the top sheet edge.
Apply EPDM primer to splice area and permit to flash off.
For end laps, apply sealing tape to the primed surface, remove the poly backing and roll the top sheet onto the mating surface.
Tape splices must be a minimum of 2-1/2” wide using 3” wide sealing tape extending 1/8” minimum to 1A” maximum beyond the splice edge.
Immediately roll the splice using positive pressure when using a 2” wide steel roller. Roll across the splice edge, not parallel to it.
This operation is repeated until the entire surface is covered/waterproofed.
Membrane Termination:
Upper ends of membrane shall be terminated above roof finishing level (minimum 150mm) using extruded aluminum termination pressure bar, mechanically fastened at 300 O.C., and completely sealed with mastic sealant.
Storage Conditions:
Products must be stored in their original packaging under cool and dry conditions. They must be protected from direct sunlight & rain.
Adhesives, primers and sealants should be stored in a cool shaded storage or in air-conditioned containers
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Criteria
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System Property
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Substrates
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Substrate Options
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Concrete Deck / Metal Deck
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Insulation
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Insulation Type
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Polyisocyanurate Foam Insulation Board
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Application Options
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Mechanically Attached / Fully Adhered
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Board Sizes Options
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4’ x 4’ / 4’ x 8’
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Thickness (inches)
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1.0” / 1.5” / 1.75” / 1.8” / 2.0” / 2.5” / 2.6” /
3.0” / 3.5” / 3.8” / 4.0” / 4.3” / 4.5”
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Membrane
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Membrane Type
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Single-Ply Synthetic Rubber
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Application Type
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Fully Bonded
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Thickness Options
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45mils / 60mils / 75mils / 90mils
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Color Options
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Black / White
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Roll Size (W x L)
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10-50ft x 200ft
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