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GCP Applied Technologies 34 in. x 70 ft. Ultra Butyl Roof Underlayment Roll
Regular price $461.14GCP Applied Technologies 34 in. x 70 ft. Ultra Butyl Roof Underlayment Roll
GCP Applied Technologies Ultra underlayment is a butyl-based self-adhering roof underlayment supplied as a 34-inch by 70-foot roll covering 198 sq ft. It is ICC-ES approved and UL classified for use under roofing. One sell unit is one roll, weighing approximately 42 lb, providing about 1.9 squares of coverage.
Key Features:
- 198 sq ft roll: Each 34 in. x 70 ft. roll covers 198 square feet, about 1.9 squares.
- Butyl self-adhering: Butyl-based self-adhering membrane for waterproof protection under roofing.
- ICC-ES approved: Listed as ICC-ES approved.
- UL classified: UL classified per the listed standards.
- 42 lb roll: One roll weighs approximately 42 lb.
Specifications Table:
| Specification | Details |
|---|---|
| Brand | GCP Applied Technologies |
| Manufacturer model | 652848 |
| Sell unit | 1 roll, 34 in. x 70 ft. |
| Product line | Ultra |
| Type | Self-adhering butyl roof underlayment |
| Dimensions | 34 in. x 70 ft. |
| Coverage per unit | 198 sq ft |
| Coverage per square | 1.9 Sq |
| Applicable standards | ICC-ES Approved; UL Classified |
| Weight | 42 lb |
| Pack quantity | 1 |
Coverage & How Much You Need:
One roll covers 198 square feet (34 in. x 70 ft.), roughly 1.9 squares of roof area. Deduct for laps at side and end seams per the manufacturer's installation instructions when estimating rolls.
Fit and Compatibility:
Use as a self-adhering underlayment beneath shingle, tile or metal roofing per the manufacturer's instructions; primers for porous substrates and compatible flashing membranes are sold separately. Follow GCP application requirements for temperature and substrate condition.
Frequently Asked Questions (FAQ):
Q: How much does one roll cover?
A: Each roll covers 198 square feet, approximately 1.9 squares, before lap deductions.
Q: What size is the roll?
A: The roll is 34 inches wide by 70 feet long.
Q: Is it self-adhering?
A: It is a butyl-based self-adhering underlayment membrane.
Q: What approvals does it have?
A: It is listed as ICC-ES approved and UL classified.
Q: How heavy is a roll?
A: The listed item weight is approximately 42 lb.
Q: How is it installed?
A: Roll it onto a clean, dry, primed substrate per the manufacturer's instructions, laps and all, checking local code for eave and valley requirements.
Expert Verdict — Reviewed by the SuperArbor Pro Desk
A 34-inch-wide butyl self-adhering roll is a workhorse for valleys, eaves, ridges and full-deck underlayment where ice and water protection is required. Verify substrate priming on porous surfaces and install within the manufacturer's stated temperature window for good wet-out. Order by squares, at roughly one roll per 1.9 squares, adding rolls for lap and detail waste.
Self-adhering membranes are slippery when wet or dusty and can be hot to work in sun; wear slip-resistant footwear and follow safe ladder and roof-access practices.
Order the GCP Ultra 34 in. x 70 ft. butyl underlayment roll for watertight roof protection.
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