G.A.P. Roof Underlayment

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Best G.A.P. Roof Underlayment alternativesBest choice

APOC AP-26 #30 Tuff-Felt Premium Asphalt-Saturated Roof Underlayment 36 in x 72 ft, 216 sq ft

Coverage area216 sq.ft.
Unrolled length72 ft
Application methodNail/Staple

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APOC Gator-Skin Synthetic Roof Underlayment 42 in x 285.8 ft, 1000 sq ft

Coverage area1000 sq.ft.
Underlayment typeSynthetic
Unrolled length285.8 ft
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Tamko No. 30 UL ASTM Asphalt Saturated Organic Felt Roof Underlayment 36 in x 72 ft, 216 sq ft

Coverage area216 sq.ft.
Underlayment typeAsphalt-Saturated Felt
Unrolled length72 ft
Application methodNail/Staple

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APOC SB-1 Weather Armor 2 Square Self-Bond Rubberized Asphalt Roof Underlayment 36 in x 66.7 ft, 200 sq ft

Coverage area200 sq.ft.
Underlayment typeRubberized Asphalt
Unrolled length66.7 ft
Application methodPeel & Stick

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Polyglass Polystick IR-Xe Self-Adhered Ice & Water Protection Shingle Roof Underlayment 36 in x 65 ft 4 in, 195 sq ft

Coverage area195 sq.ft.
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Unrolled length65 ft
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CertainTeed DryRoof SA Waterproof Rubberized Asphalt Roof Underlayment 36 in x 65 ft, 195 sq ft

Coverage area195 sq.ft.
Underlayment typeRubberized Asphalt
Unrolled length65 ft
Application methodPeel & Stick

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ABC Pro Guard 20 Synthetic Roof Underlayment 42 in x 286 ft, 1000 sq ft

Coverage area1000 sq.ft.
Underlayment typeSynthetic
Unrolled length286 ft
Application methodNail/Staple

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GAF WeatherWatch Mineral-Surfaced Rubberized Asphalt Roof Underlayment 36 in x 66.7 ft, 200 sq ft

Coverage area200 sq.ft.
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Overview
Articles

What Makes G.A.P. Roofing Your Best Choice for Roof Protection?

G.A.P. Roofing has been manufacturing premium roofing and waterproofing products for over 30 years, establishing itself as America's #1 capacity leader in felt production. Based in Pryor, Oklahoma, this family-owned company operates manufacturing facilities across Texas, California, and Florida, ensuring nationwide availability and competitive G.A.P. roofing prices. Their vertically integrated approach includes their own paper mill, allowing complete quality control from raw materials to finished gap roofing underlayment products. This strategic manufacturing presence enables G.A.P. to deliver superior roof gap protection while maintaining cost-effective pricing for contractors and builders nationwide.

Why Choose G.A.P. Over Other Roofing Brands?

🏭 Proven Heritage: Over 30 years of manufacturing experience with #1 US capacity in felt production

🔬 Patented Innovation: Slip-resistant surface technology (U.S. Patent #7745353) for enhanced safety during installation

⚙️ Vertically Integrated: Own paper mill ensures consistent quality control and competitive gap underlayment pricing

🇺🇸 Nationwide Support: Four manufacturing locations provide reliable supply chain and personalized customer service

Which G.A.P. Product Series Best Fits Your Project?

G.A.P. WaterGuard™ All-Purpose Synthetic Series

Coverage & Key Feature	400 sq ft per roll with patented slip-resistant surface
Target Application	Residential steep-slope roofing under asphalt shingles
Technical Specs	Polypropylene two-side coated woven fabric, 2.7 oz/yd² weight
Unique Features	Patented slip-resistant technology, grey non-woven top surface
Models Available	WaterGuard All-Purpose (standard coverage)
Warranty & Installation	Manufacturer warranty with technical support, mechanically fastened

G.A.P. WaterGuard™ Metal & Tile Series

Coverage & Key Feature	Specialized for metal and tile applications with enhanced durability
Target Application	Commercial and residential metal roofing, tile installations
Technical Specs	Heavy-duty polypropylene construction, superior tear strength
Unique Features	AMT (Architectural Metal & Tile) specific formulation
Models Available	MetalGuard HT (high temperature), Metal & Tile Standard
Weather Resistance	Enhanced UV stability and thermal cycling resistance

G.A.P. ASTM Felt Series

Coverage & Key Feature	216 sq ft per roll, ASTM D226 Type 2 compliance
Target Application	Traditional residential and commercial underlayment
Technical Specs	Superior quality organic felt saturated with asphalt
Unique Features	Florida Building Code Approved (FL #2894.5), Miami-Dade approved
Models Available	ASTM 30 D226, G15 Felt, various weights available
Installation	Traditional nail-down installation, proven performance

How Does G.A.P. Compare to Leading Competitors?

Feature/Characteristic	G.A.P. WaterGuard	Competitor A	Competitor B
Coverage Area	400 sq ft	375 sq ft	350 sq ft
Material Type	Patented polypropylene	Standard synthetic	Basic synthetic
Warranty Period	Full manufacturer	Limited	Standard
Price/Performance Ratio	⭐⭐⭐⭐⭐	⭐⭐⭐	⭐⭐⭐
Weather Resistance Rating	Superior	Good	Standard
Installation Ease	Patented slip-resistant	Standard	Basic
Notable Strengths	US Patent #7745353, family-owned quality	Volume availability	Basic protection

What Technical Specifications Make G.A.P. Superior?

Technical Specification	G.A.P. Details
Material Composition	Polypropylene two-side coated woven fabric with non-woven top
Thickness & Weight	6 mil overall thickness, 2.7 oz/yd² ±5% (ASTM D1777)
Water Resistance	Superior moisture protection with vapor permeability
Independent Testing	ASTM D226 compliance, Florida Building Code approved
Weather Resistance	UV stable, thermal cycling tested, wind uplift rated
Tear Strength	Enhanced tear resistance with woven fabric construction
Nail Pull-Through	Superior fastener retention, reduced blow-off risk

What Do Industry Professionals Say About G.A.P.?

🏆 Professional Recognition: G.A.P. Roofing maintains Florida Building Code approval and Miami-Dade certification, demonstrating compliance with the nation's most stringent building standards. The company's 30-year manufacturing heritage and #1 US capacity position reflects widespread industry trust.

"The slip-resistant surface on G.A.P. WaterGuard makes installation so much safer, especially on steep slopes. We've used it on over 200 homes this year with zero callbacks."

- Mike Thompson, Thompson Roofing LLC

"Being family-owned shows in their customer service. When we had questions about their MetalGuard HT for our commercial project, their technical team walked us through everything."

- Sarah Rodriguez, Commercial Roofing Solutions

📈 Industry Standing: G.A.P.'s vertically integrated manufacturing and own paper mill operation ensures consistent quality that has earned recognition from distributors and contractors nationwide.

Frequently Asked Questions About G.A.P. Products

Where are G.A.P. underlayments manufactured?

G.A.P. operates manufacturing facilities in Pryor, Oklahoma (headquarters), McGregor, Texas, Shafter, California, and Jasper, Florida, ensuring nationwide coverage and supply chain reliability.

What warranty coverage does G.A.P. provide?

G.A.P. provides comprehensive manufacturer warranties on all products, with specific coverage varying by product line. WaterGuard synthetic products include technical support and installation guidance.

Are G.A.P. products suitable for extreme weather conditions?

Yes, G.A.P. underlayments are tested for thermal cycling, UV exposure, and wind uplift. Products maintain Florida Building Code approval and Miami-Dade certification for high-wind zones.

How does G.A.P. compare to competitors in performance?

G.A.P.'s patented slip-resistant surface technology (U.S. Patent #7745353) provides unique safety advantages during installation while maintaining superior weather protection.

What building code certifications do the products have?

G.A.P. products meet ASTM D226 standards, maintain Florida Building Code approval, and carry Miami-Dade certifications for high-velocity hurricane zones.

Is bulk purchasing available for contractors?

Yes, G.A.P.'s four manufacturing locations enable competitive bulk pricing and reliable delivery schedules for contractors and distributors nationwide.

Ready to Experience Superior Roof Protection?

Discover the complete G.A.P. roofing underlayment range, from synthetic WaterGuard products to traditional ASTM felt options. Check current G.A.P. roofing prices and secure your supply of America's most trusted gap roofing underlayment. With patented safety features, proven weather resistance, and three decades of manufacturing excellence, G.A.P. delivers the reliable protection your projects demand.

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