Royal Grip Syntactic

Royal Grip – NW™ is 100% synthetic roofing underlayment designed for 15lb asphalt felt replacement.

Offering: traction for working surface on roofs, high tear strength as compare to 15Lb felt, can be used for commercial and residential installations, using recommended fasteners and is an ideal underlayment for asphalt shingles.

It is also easy to install having a helpful pre-printed layout for fasteners and overlap lines. Royal Grip – NW™ is designed for value added performance to compete with 15lb felt which is the best choice for next asphalt shingle roof.

  • 25 Times Stronger than regular Type 15 felt, when installed as directed in the installation instructions.
  • Resistant to tearing and stretching around fasteners; during high winds or in high-traffic areas.
  • Skid-resistant polymer coating provides traction and a safer working surface
  • Wider offering greater coverage
  • 100% recyclable material, manufactured from recyclable material
  • More effective and lighter in comparison to regular Type 15lb felt
  • Won’t crack, buckle or warp: Royal Grip – NW™ with its lay-flat and water repellent keeps Royal Grip – NW™ from warping, wrinkling and cracking in cold weather.
  • Royal Grip – NW™ is a synthetic product that will support no – mold, no oil leaching and has no hazardous properties
  • Enhanced UV Resistant
  • Pre-printed nailing pattern and overlap lines for speedy installation

Before you install Royal Grip – NW™:

Ensure strapping or roof deck is fastened in accordance with local Building Code requirements and all preparatory work has been completed and is safe;

Confirm the support structure is clean, smooth and free of obstructions, that there is no bowing, warps, delamination, or separation from rafters, trusses, or support structure. Royal Grip – NW™ shall be installed using only compatible materials and as specified in these instructions;

Royal Grip – NW™ is an underlayment and is intended to be a second layer of protection; for use with Asphalt Shingles.

Should you have any questions or concerns regarding the installation of Royal Grip – NW™ contact your supplier or local sales representative;

Royal Grip – NW™ shall be installed by qualified, experienced installers adhering to WSBC and OSHA regulations; Synthetic underlayment may become slippery due to moisture, dust, debris or other conditions, which affect the level of surface friction. Always use caution and proper safety equipment when installing Royal Grip – NW™; failure to comply with safety regulations can result in serious injury or death.

Installation Instructions:

Royal Grip – NW™ Synthetic Roofing Underlayment is a high performance, secondary layer, approved for installation beneath asphalt shingles and concrete tile steep-slope roofing systems.

Proper roof ventilation, as specified in local building codes and roof-system warranty guides is required as part of the installation of Royal Grip – NW™.

Royal Grip – NW™ is installed horizontally, parallel to the eaves, with the printed side showing and overlapped to shed water. Minimum Overlaps: 6” for vertical overlaps and 4” for horizontal overlaps.

For use on low slope roofs defined as slopes pitched at (Inches Vertical: Inches Horizontal) 2:12 – 4:12 or 17% – 33%: Royal Grip – NW™ Underlayment must be half lapped.

Royal Grip – NW™ shall be securely fastened with corrosion resistant ring shanked roofing nails with a minimum 1”diameter plastic cap. DO NOT USE STAPLES.

Fastening patterns are indicated on the underlayment. Fasteners shall be driven perpendicular to the roof deck. Ensure fasteners are not over or under driven. Fasteners shall be spaced @ 12” o.c. (on center) in the center of the vertical and horizontal overlaps. The remaining area shall be fastened @ 12” o.c. vertically and @ 24” o.c. horizontally.

Corrosion resistant roofing nails with a 3/8” head diameter may be used to fasten the final roof covering.

Royal Grip – NW™ should not be exposed to ultra violet radiation for an indefinite period of time; the final roof system should be installed within 30 days.

For expected prolonged exposure or in areas having high winds overlapping and fastening shall be doubled. Overlap shall be increased to 8” horizontal and 12” vertical. Underlayment shall be fastened @ 6” o.c. vertical and center laps and @ 12” horizontal throughout the field. Alternatively an approved sealant may be used between the lap and overlapping segments or two-sided adhesive seam tape.


Direct Metal Roll Forming is committed to manufacturing and supplying high-quality metal roofing, siding and cladding. Resulting in superior products that are backed by a 50-year Warranty. Each system is unique and innovative giving projects a distinctive look. Options include Direct-Lok Roofing Panel and Standing Seam. Direct Metal Roll Forming proudly manufactures metal roofing and cladding in Greater Vancouver, Okanagan Valley and Vancouver Island Canada.

We share our industry knowledge and expertise to the benefits of customer retailers and installers. Providing them with support and training to supply complete roofing, siding and cladding systems. Direct Metal Roll Forming’s strength relies on our ability to know which materials will look good and function best in various building applications and climate conditions. We are also assisting architects and engineers in finding the right products for their specific building requirements.

How to contact us

If you’ve got questions or ideas you would like to share, send a message. For anything more specific, please use one of the addresses listed below.

Our Location

30694 Simpson Rd Unit A, Abbotsford, BC V2T 6C7
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Phone Number

+1 (778) 552-7663

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