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TopShield G300 Glass Fiber Reinforced Self-Adhesive Ice & Water Roofing Underlayment, Black, 1 or 1.95 Square Roll
Regular price $81.00Orders start at $399 — combine any items to reach the minimum. Learn more
TopShield G300 Glass Fiber Reinforced Self-Adhesive Ice & Water Roofing Underlayment, Black, 1 or 1.95 Square Roll
TopShield G300 Ice and Water is a glass fiber reinforced, self-adhesive modified bituminous underlayment for use under slate and asphalt shingles, sold in black 1-square or 1.95-square rolls. Mineral granules on the upper surface provide enhanced skid resistance. The release film peels off for easy installation and handling.
Key Features:
- Self-adhesive membrane: Self-adhesive modified bituminous underlayment bonds without mechanical fastening across the field.
- Glass fiber reinforced: Reinforced with glass fiber for strength and stability.
- Skid-resistant surface: Mineral granules on the upper surface provide enhanced skid resistance and improved footing.
- Easy peel release: The release film peels off for easy installation and handling.
- Shingle compatible: For use under slate and asphalt shingles.
- Roll size choice: Available in 1 square and 1.95 square rolls.
Specifications Table:
| Specification | Details |
|---|---|
| Brand | TopShield |
| Sell unit | 1 roll, 1 or 1.95 square |
| Product line | TopShield G300 |
| Available colors | Black |
| Available sizes | 1 Square/Roll; 1.95 Square/Roll |
| Material | Glass fiber reinforced, self-adhesive modified bituminous underlayment |
| Finish / texture | Mineral granule upper surface |
| Coverage per unit | 1 sq. (100 sq. ft.) or 1.95 sq. (195 sq. ft.) per roll |
| Color | Black |
| Intended use | Ice and water protection under slate and asphalt shingles |
| Exposure limit | 30 day exposure limit |
Coverage & How Much You Need:
A roll covers 100 sq. ft. (1 square) or 195 sq. ft. (1.95 square). Measure eaves, valleys and other vulnerable areas, and allow for laps per the manufacturer's installation instructions when sizing rolls needed.
Fit and Compatibility:
Designed for use under slate and asphalt shingles in residential roofing assemblies. It pairs with standard roof deck preparation; shingle product and fasteners are sold separately.
Frequently Asked Questions (FAQ):
Q: What is included?
A: Each roll of TopShield G300 underlayment, either 1 square or 1.95 square, with a peel-off release film.
Q: How much area does one roll cover?
A: The 1 square roll covers 100 sq. ft. and the 1.95 square roll covers 195 sq. ft. before laps.
Q: What roof coverings work over it?
A: It is designed for use under slate and asphalt shingles.
Q: Is the surface slippery to walk on?
A: No, mineral granules on the upper surface provide skid resistance and improved footing.
Q: How long can it be exposed?
A: The stated exposure limit is 30 days.
Expert Verdict — Reviewed by the SuperArbor Pro Desk
Run G300 in the ice-and-water zone at eaves, valleys and around penetrations, then field with standard underlayment. Roll out, peel the release film and press or roll the membrane to the deck for good adhesion. Choose the 1.95 square roll for larger areas and the 1 square roll for valleys and small detail work.
Peel-off release films can be slippery underfoot once dropped; keep the work area clear and follow fall protection requirements on sloped decks.
Order TopShield G300 Ice & Water Underlayment today to protect your shingle roof from ice and water.
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