Intertape Polymer Group (IPG) UMBRA - Manual

REINFORCED CONSTRUCTION PAPER
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SPECIFICATIONS
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FOR USE ONLY UNDER ASPHALT SHINGLES
MEETS: ASTM D226/D226-09 FOR TYPE II; ASTM D4869 FOR TYPE I, II, III, IV; CSA A123.3 FOR TYPE 1, 2, 3
INSTALLATION INSTRUCTIONS
• Umbra ™ Synthetic Roof Underlayment must be installed above properly ventilated spaces per local building codes, and is considered
to be a vapor barrier.
• The roof deck should be swept clean of dirt and debris and be smooth and dry prior to installation. Umbra ™ Synthetic Roof
Underlayment is limited to use with asphalt shingles.
• A sharp, straight edge cutting blade is recommended for cutting Umbra ™ Synthetic Roof Underlayment.
• Umbra ™ Synthetic Roof Underlayment should be installed when the ambient air and substrate temperatures, at the time of installation,
are above 40°F (4°C).
• Umbra ™ Synthetic Roof Underlayment is laid horizontally (parallel to the eave) with the print side up with 4 inch (10 cm) horizontal laps
and 6 inch (15 cm) side laps. Align head laps with the expected direction of flow of water in a shingling fashion.
• Umbra ™ Synthetic Roof Underlayment should generally be used at slopes of 2:12 or greater.
• In normal wind zones, Umbra ™ Synthetic Roof Underlayment is attached to the roof with roofing nails (ring shank preferred) having a 1
inch (2.5 cm) diameter plastic cap spaced at 6 inches (15 cm) on center on both head and end laps, and 12 inches (30 cm) on center in
the field area in the middle of the roll.
• Nails may be hand or machine applied, but should be driven squarely into the deck to secure caps flush to the underlayment.
• If installed using staples, use 18 gauge stainless steel with a minimum
7 ∕
16
" (1 cm) crown. Material must be covered in 24 hours.
• In high wind zones or coastal applications, decrease the spacing to 4 inches (10 cm) on center on both head and end laps with 12
inches (30 cm) on center in the field area.
• In areas subject to wind speeds in excess of 90 miles per hour (145 km/h) (UBC), or wind speeds in excess of 110 miles per hour
(177 km/h) (IBC and IRC), Umbra ™ Synthetic Roof Underlayment should be applied per Sections 1507.2.8.1 of the IBC and Section
R905.3.3.3 of the IRC.
• For roofs required to have an ice barrier under the IBC or IRC, or a severe climate underlayment under the UBC, a self-adhered
polymer modified bitumen sheet, complying with ASTM D1970 or the ICC-ES Acceptance Criteria for Severe Climate Underlayments
(AC 48) shall be applied. The severe climate underlayment shall be applied over the solid substrate in sufficient courses that the
underlayment extends up the roof a distance equal to the distance inside the exterior wall line of the building that is specified in the
appropriate section of the applicable code. Umbra
™ Synthetic Roof Underlayment shall overlap the severe climate underlayment.
• Umbra ™ Synthetic Roof Underlayment should be covered by the final roof covering as soon as possible as it not designed for indefinite
outdoor exposure. It is recommended that the final roof covering should be installed no later than 30 days after the installation of
Umbra
™ Synthetic Roof Underlayment.
• The procedures for new construction also apply for re-roofing applications after removal of the old roof covering and underlayments to
expose the roof deck.
SAFETY PRECAUTIONS
Read before use. Refer to MSDS for additional information.
• CAUTION! Umbra ™ roof underlayment may be slippery when wet or covered with mud, dust, frost, ice or snow.
• Comply with all OSHA or other standards and codes for roof work.
• Always use a Fall Protection System when working on roofs.
• Use roof jacks with planks, toe boards or storage platforms secured to the substrate to prevent slippage of stored material.
• Stay away from power lines, do not contact with body or equipment.
• On steep pitched surfaces, roof jacks with planks should be used for standing.
• Follow all ladder safety standards and codes.
• Never leave scraps, wrappers or other debris on the roof surface.
• Dispose of waste in accordance with local regulations.
Umbra ™
INSTALLATION INSTRUCTIONS