Skip to content
TopShield 180 by Bigfoot Synthetic Roofing Underlayment, 48 in. x 250 ft Roll, Gray Anti-Slip Coated Woven
Regular price $98.00Orders start at $399 — combine any items to reach the minimum. Learn more
TopShield 180 by Bigfoot Synthetic Roofing Underlayment, 48 in. x 250 ft Roll, Gray Anti-Slip Coated Woven
TopShield 180 by Bigfoot is a coated woven synthetic roofing underlayment for sloped roofs, sold as one 48 in. x 250 ft white roll. Engineered to replace 15# and 30# felt, it is 35 times stronger and 8 times lighter than 30# felt with durable weather and tear resistance. A gray anti-slip top coating provides superior foot traction during installation.
Key Features:
- Replaces felt: Specifically manufactured to replace 15# and 30# organic felt underlayment on sloped roofs.
- 35x stronger: 35 times stronger than 30# felt, providing tough, durable weather and tear resistance.
- 8x lighter: 8 times lighter than 30# felt, making rolls easier to carry and handle on the roof.
- Anti-slip surface: The top surface has an added anti-slip coating that enhances skid resistance and helps protect against costly slips and falls.
- Gray traction surface: Unique gray surface offers superior foot traction and more friction and slip resistance than standard roofing felt.
- Mechanically attached: A highly engineered, mechanically attached, coated woven synthetic underlayment.
Specifications Table:
| Specification | Details |
|---|---|
| Brand | TopShield |
| Sell unit | 1 roll, 48 in. x 250 ft |
| Product line | TopShield 180 by Bigfoot |
| Available colors | ['White roll with gray anti-slip top surface'] |
| Available sizes | ['48 in. x 250 ft roll'] |
| Dimensions | 48 in. x 250 ft per roll |
| Material | Coated woven synthetic (mechanically attached) |
| Finish / texture | Anti-slip coated gray top surface |
| Nominal size | 48 in. x 250 ft |
| Replaces | 15# and 30# roofing felt |
| Strength | 35 times stronger than 30# felt (manufacturer stated) |
| Weight comparison | 8X lighter than 30# felt |
| Intended use | Underlayment for sloped roofs under shingles or other roof coverings |
Coverage & How Much You Need:
One 48 in. x 250 ft roll covers approximately 1,000 sq ft of roof at full width; allow for laps per your fastening pattern and local code when sizing the job.
Fit and Compatibility:
Designed as a mechanically attached underlayment for sloped residential roofs, installed beneath shingles or other roof coverings. Fasteners are per manufacturer's instructions; pair with appropriate drip edge and starter products for the roof assembly.
Frequently Asked Questions (FAQ):
Q: What is included?
A: One roll of TopShield 180 synthetic underlayment measuring 48 in. x 250 ft.
Q: How much area does one roll cover?
A: A 48 in. x 250 ft roll covers about 1,000 sq ft at full width before lap deductions.
Q: Can it replace 30# felt?
A: Yes, it is specifically manufactured to replace 15# and 30# felt and is stated to be 35 times stronger and 8 times lighter than 30# felt.
Q: Is it slippery to walk on?
A: No, the gray top surface has an added anti-slip coating for superior foot traction and greater slip resistance than standard felt.
Q: How is it attached?
A: It is a mechanically attached underlayment; follow the manufacturer's fastening instructions during installation.
Q: What color is the material?
A: The roll is white, with a unique gray anti-slip coated top surface.
Expert Verdict — Reviewed by the SuperArbor Pro Desk
Synthetic underlayment like TopShield 180 is the go-to on steep-slope jobs where crew safety and tear resistance matter; the anti-slip gray surface is a real advantage on steeper pitches. Because it is 8 times lighter than 30# felt, crews can stage more rolls without extra labor. Cap nails or the manufacturer's specified fasteners and correct overlap will keep the system flat and watertight until shingles go on.
Anti-slip coating reduces but does not eliminate fall risk; use proper roof fall protection and safe staging practices during installation.
Order TopShield 180 by Bigfoot synthetic underlayment in 48 in. x 250 ft rolls for strong, anti-slip protection on your next roof.
All third party trademarks, including logos and icons, referenced on our website and product pages remain the property of their respective owners. Unless specifically identified as such, Arbor's use of third party trademarks does not indicate any relationship, affiliation, sponsorship, or endorsement between Arbor Home and the owners of these trademarks. Any references by Arbor Home to third party trademarks are to identify the corresponding third party goods.
