RhinoRoof ® Granulated


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RhinoRoof Granulated

A waterproof barrier for use under Asphalt Shingles, Synthetic Shingles, Residential Roofing and Cedar Shakes

A waterproof barrier for use under Asphalt Shingles, Synthetic Shingles, Residential Roofing and Cedar Shakes

RhinoRoof Granulated

Features & Benefits

  • Excellent Adhesion – Tested at 40º F and 75º F adhesion to the deck exceeds ASTM D1970 standards*
  • Flexible Installation – Even at cold temperatures
  • Lap adhesion – Constructed with a taped selvage edge for 3 inches of edge lap protection
  • Walkable Surface – Provides a slip-resistant surface with minimal loose granules for excellent traction and safe installation
  • Easy to install – Split backer sheet for easy application and positioning on the roof deck
  • Extended UV Exposure – Can be left exposed up to 30 days

* Product tested as manufactured. Test data is based on average taken over several production runs and should not be considered or interpreted as minimum or maximum values. Values are typical data as manufactured and not limiting specifications. All values = 10%. See www.InterWrap.com/RhinoRoof for complete coverage and restrictions.

More reasons to choose RhinoRoof Granulated


The self-adhered layer in a roof deck protection system provides a waterproof barrier for vulnerable areas on a roof. Whether the building is faced with wind-driven rain or the potential for ice damming, having a waterproof barrier will help provide protection for a long-lasting roof.

RhinoRoof Granulated self-adhered underlayment provides that essential waterproof barrier as a second line of defense against water mitigation. RhinoRoof Granulated combined with a synthetic underlayment, such as RhinoRoof U20 creates an underlayment system to protect the roof deck from eave to peak.

Roofing Contractor Customer Loyalty Program


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Installation Instructions

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RhinoRoof Granulated is a waterproof barrier and therefore must be installed above a properly ventilated space(s). Follow ALL building codes applicable to your geographical region and structure type as it is considered a vapor barrier.


  • RhinoRoof Granulated should be stored at room temperature, upright in the original cardboard packaging in a dry properly ventilated area. Keep product sheltered from the elements.
  • Only rolls destined for same-day use should be removed from their storage area.
  • For best results store in temperatures between 40°F (4.4°C) and 90°F (32°C). If room temperature storage is not available and product is at a temperature of 40°F (4.4°C) or less, move the product to a warm area prior to application. If product has been stored in temperatures above 90°F (32°C) it may become difficult to remove the release backing. If this situation should occur, move product into a shaded area until the product is cool. Once cooled, the release backing can be easily removed.


  • Sweep the deck to remove dirt, debris, and any damaged or rotten wood must be replaced.
  • RhinoRoof Granulated must be applied directly to minimum 3/8 inch-thick plywood, 7/16 inch-thick OSB decking, or minimum 6 inch-wide deck boards (gaps no greater than 1/4 inch) on roofs with a slope of 2:12 or greater.
  • For re-roofing projects replace any water damaged sheathing and sweep roof deck thoroughly removing dust, dirt and loose nails. Do not install over old roof covering.


  • For best results RhinoRoof Granulated must be installed over a clean, smooth and dry roof deck.
  • For cold weather applications 40°F (4.4°C) or below, a primer should be used and the laps blind nailed (see note 5 under application). The primer should be solvent or water based and meet ASTM D41 for asphalt based self-adhering membranes.
  • For steep slope applications (3:12 or greater) or when installing at temperatures greater than 100°F (38°C) it is recommended to blind nail the selvage edge area as per note 5 below under application.
  • RhinoRoof Granulated is to be laid out horizontally (parallel) to the eaves with the printed side up, using 3 inch horizontal laps and 6 inch vertical laps with the lower edge of the RhinoRoof Granulated flush with the outside of the drip edge. The lower edge of the underlayment is the edge that does not have a film selvage edge. End laps should be offset a minimum of 6 feet on adjacent courses.
  • On slopes greater than 6:12 after installation of each piece, overlap the 3 inch film selvage edge and, if necessary, secure with nails installed in the selvage edge spaced 12 inches on center. Blind nail with 3/8 inch head roofing nails of 1 inch or longer in the 3 inch selvage edge area. Consult local building codes for fastener requirements.
  • Always work from the low point to the high point of the roof. Apply the membrane in valleys before the membrane is applied to the eaves.
  • Cut the membrane into 15 foot to 20 foot lengths. Peel back 1-2 feet of release liner, align the membrane, and continue to peel the release liner from the membrane. Hand press or walk on, then follow with a 40 lb. or heavier weighted roller to smooth and secure the membrane. Hand rolling over the selvage edge and directly above the selvage edge using a minimum 4 inch-wide, 10 lb. roller is recommended. If a roller is not available or not considered safe, walk on all laps, and as much of the field area as possible to push the adhesive into the pours of the roof deck and overlap.
  • RhinoRoof Granulated should be applied over the metal drip edge at the eaves unless otherwise specified by local codes. Along rakes, apply RhinoRoof Granulated underlayment first, and install drip edge over the underlayment. Do not fold RhinoRoof Granulated over the roof edge unless the edge is subsequently covered over by a drip edge or other flashing material.
  • In areas where ice damming can occur, install RhinoRoof Granulated from the eave up the roof to a point not less than 24 inches inside the exterior wall. Consult your local building code for specific requirements.
  • For valley applications, peel the release liner; center the sheet over the valley and hand press in place from the center of the valley outward. Note: It is very important RhinoRoof Granulated stay in contact with the roof deck into and out of the valley area. RhinoRoof Granulated should never be suspended or bridge a valley. It is recommended to follow up with a weighted roller or by walking on the surface. Give special attention to ALL perimeter edge areas.
  • If fasteners are removed leaving holes in the membrane or other penetrations are accidentally produced, they must also be patched.
  • Do not install fasteners through membrane over any unsupported areas of the structural deck, such as over joints between adjacent structural panels.
  • For geographies with high elevation, high wind or wind driven rain it is recommended to cover the entire roof deck with RhinoRoof Granulated.

FASTENERS: For same day coverage with primary roofing RhinoRoof Granulated can be anchored with corrosive resistant 3/8” head x 1“ leg roofing nails (ring shank preferred, smooth leg acceptable). The use of every other anchoring location printed on the product is also acceptable. If RhinoRoof Granulated will be left exposed for up to 60 days the product must be anchored with 1" plastic or metal cap smooth or ring shank roofing nails and anchored in all locations printed on the facer. DO NOT USE STAPLES: the use of staples to penetrate RhinoRoof Granulated will void warranty.

ANCHORING: All anchoring nails must be flush, 90 degrees to the roof deck, and tight with the underlayment surface and the structural roof deck. Where seams and joints require sealant or adhesive use a low solvent plastic roofing cement meeting ASTM D-4586 Type 1, or Federal Spec SS-153 Type 1 such as Karnak, Henry, DAP, MB, Geocel or equivalent. Acceptable alternatives are butyl rubber, urethane, and EDPM based caulk or tape sealant.

EXTENDED EXPOSURE: If RhinoRoof Granulated product will be exposed longer than 24 hours and up to 60 days then product must be attached to the structural roof deck using a minimum 1” diameter plastic or metal cap roofing nails (ring shank preferred but smooth leg acceptable). Miami Dade approved tin tags/metal caps are also acceptable, and it is recommended for best performance to use with the rough edge facing up. For extended exposure it is always recommended to anchor on every printed position on the facer. RhinoRoof Granulated is not designed for indefinite outdoor exposure.

For extended exposure conditions where driving rain or strong winds are expected it is recommended to take additional precautions such as doubling the lap widths. Alternately or in addition to a compatible sealant could be used between the laps or a peel and stick tape could be applied to the overlaps.

Good safety practices should be followed on steep slope roofs, such as use of tie-offs, toe boards, ladders and/or safety ropes and personal body harnesses. Follow OSHA guidelines. Slip resistance may vary with surface conditions from debris that accumulates, weather, footwear and roof pitch. Failure to use proper safety gear can result in serious injury. Depending on roof pitch and surface conditions, blocking may be required to support materials on the roof and is good safety practice. Remember to seal the nail holes after removing blocking.

RhinoRoof Granulated Technical Data

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RhinoRoof Granulated Roll/Pallet Specs
LENGTH PER ROLL: 65’ / 19.8 m
WIDTH PER ROLL: 36” / 91 cm
ROLL SIZE: 1.95 sq / 18 m²

This product is manufactured in accordance with national standards which allow for non-critical variances in weights and measures. Values are typical data and not limiting specifications. All values ± 10%

Test & Standard RhinoRoof Granulated Typical Value
Permeability ASTM E96 Granulated
Release Liner Silicone treated poly split release
Nail Sealability ASTM D1970 Pass
Permeability ASTM E96 <0.1 perms
Tensile Strength ASTM D1970 > MD 25 lbf (4.4kN/M) / CD 25 (4.4kN/M)
Low Temp Flexibility ASTM D1970 Pass
Tear Resistance ASTM D1970 > MD 20 lbf (89N) / CD 20 (89N)
Adhesion to Plywood ASTM D1970 40°F (>2 lb/ft) / 75°F (>12 lb/ft)
Waterproofing Integrity After LowTemperature Flex ASTM D1970 Pass
Waterproofing Integrity of LapASTM D1970 Pass
Florida Product Approved

MD = Machine Direction CD = Cross Direction
Test data is based on an average taken over several production runs and should not be considered or interpreted as minimum or maximum values. Values are typical data and not limiting specifications. All values ± 10%.

RhinoRoof Granulated Building Codes

  • ASTM D1970
  • ASTM E108/UL 790, Class A Fire Resistance
  • Florida Product Approval

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