MOUNTAIN BIGFOOT BARRIER is a high-performance roof underlayment engineered to deliver outstanding protection in the harshest

climates and most challenging job site environments. It’s the ideal choice for contractors, developers, and high-end residential projects.

Field-tested across the United States, MOUNTAIN BIGFOOT BARRIER offers exceptional waterproofing, tear resistance, and UV durability.

Whether exposed to high altitudes, strong winds, freezing temperatures, or prolonged sun exposure, it performs with consistent reliability.

“This product is as tough as its name — and exactly what our customers have been asking for,” said the Product Director at Mountain

Materials. “From alpine builds to cold-weather zones and long-construction timelines, MOUNTAIN BIGFOOT BARRIER delivers dependable

protection and stands up to nature’s toughest conditions.”

Engineered for Extreme Jobsite Conditions – Key Features:

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• High-strength synthetic construction – 5x the tear resistance of traditional felt

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• Slip-resistant surface – improved safety for steep-slope roof applications

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• UV resistant for up to 180 days – ideal for extended project timelines

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• Cold-crack resistant to -40°F (-40°C) – stays flexible in freezing temperatures

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• Broad material compatibility – works with asphalt shingles, metal roofing, clay tile, and more

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MOUNTAIN BIGFOOT BARRIER provides a strong foundation for modern roofing systems—helping reduce callbacks, extend roof life, and

improve installation efficiency. Whether it’s a mountain cabin or a coastal home, it delivers powerful protection from the elements.