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Westlake Royal SwiftGuard Synthetic Underlayment 10 Square Roll with Nail Gasketing Technology
Regular price $291.50Orders start at $399 — combine any items to reach the minimum. Learn more
Westlake Royal SwiftGuard Synthetic Underlayment 10 Square Roll with Nail Gasketing Technology
Westlake Royal SwiftGuard is a high-performance, four-layer synthetic roof underlayment for all steep-slope coverings including tile, steel, shingles, and natural or composite slates and shakes. One roll covers about 1,000 sq. ft. (10 squares), weighs roughly 35 lb, and features patented nail gasketing for superior moisture resistance.
Key Features:
- Nail gasketing: Patented gasketing technology in two of its four layers guards against leaks at fastener locations.
- Four-layer build: Constructed of four layers for durable, high-performance moisture resistance.
- Light roll: Each 1,000 sq. ft. roll weighs approximately 35 lb, making it easy to load and install on the roof.
- High grip backing: A high grip backing and non-woven, thermally embossed facer provide increased deck grab and superior walkability.
- All-season: Helps withstand the elements in all climates and seasons.
- Easy layout: Clearly identifiable lay lines and fastening marks speed accurate installation.
Specifications Table:
| Specification | Details |
|---|---|
| Brand | Westlake Royal |
| Sell unit | 1 roll, 10 square |
| Product line | SwiftGuard Synthetic Underlayment |
| Dimensions | 10 square per roll (approx. 1,000 sq. ft.) |
| Coverage per unit | Approximately 1,000 sq. ft. per roll |
| Weight | Approximately 35 lb per roll |
| Material | Four-layer synthetic underlayment |
| Construction | Patented nail gasketing in two layers; non-woven, thermally embossed facer; high grip backing |
| Intended use | Underlayment for steep-slope tile, steel, shingles, slates and shakes |
| Feature | Lay lines and fastening marks for accurate installation |
Coverage & How Much You Need:
One roll covers about 1,000 sq. ft. (10 squares) before laps; follow the manufacturer's lap and exposure requirements for the roof covering to calculate net coverage.
Fit and Compatibility:
Suitable under all steep-slope roofing materials including tile, steel, shingles, and natural and composite slates and shakes. Fasteners and primary roof covering are sold separately.
Frequently Asked Questions (FAQ):
Q: What is included?
A: One roll of SwiftGuard synthetic underlayment covering approximately 1,000 sq. ft. (10 squares).
Q: How heavy is a roll?
A: Each 1,000 sq. ft. roll weighs approximately 35 lb, much lighter than traditional asphalt underlayment.
Q: What roofing can it go under?
A: All steep-slope materials: tile, steel, shingles, and natural or composite slates and shakes.
Q: How do fasteners stay sealed?
A: Patented gasketing technology in two of the four layers helps guard against leaks at underlayment and roof covering fastener locations.
Q: Is it safe to walk on?
A: Yes, the high grip backing and thermally embossed facer provide superior walkability.
Q: How do I keep courses straight?
A: The roll has clearly identifiable lay lines and fastening marks to guide installation.
Expert Verdict — Reviewed by the SuperArbor Pro Desk
SwiftGuard's light 35 lb roll is easier to stage on steep roofs than 10-square asphalt rolls and its gasketing layers add real protection at fastener penetrations. Use the printed lay lines to hold laps consistent and keep walkability high on steep pitches. Match the underlayment to your covering manufacturer's requirements for exposure time before the finished roof goes on.
Synthetic underlayment can be slippery when wet or dusty; wear appropriate footwear and use fall protection while installing.
Order Westlake Royal SwiftGuard Synthetic Underlayment for lightweight, gasketed protection on your next steep-slope roof.
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