Atlas Gorilla Guard 30 Engineered Felt Underlayment 36" x 72' 4 Square/Roll
Regular price $98.00The Atlas Gorilla Guard 30 Engineered Felt Underlayment 36" x 72' 4 Square/Roll is a felt underlayment for jobs that require Atlas model/MPN 557M200 in the RL sell unit. Guard Spec 30 is a high-performance, specification-grade engineered roof underlayment for steep-slope roof applications.
Key Specs
- Brand: Atlas
- Model / MPN: 557M200
- SKU: ATLGG
- Sell unit: RL
- Product type: Felt Underlayment
- Size / color: 36" x 72' 4 Square/Roll
- Category: Residential Roofing | Residential Roofing/Underlayment | Residential Roofing/Underlayment/Felt Underlayment | Underlayment | Underlayment/Felt Underlayment
- Coverage / unit: 4 squares (400 sq ft) per roll
Key Features
- Two-square coverage roll
- 142% Stronger in Pull-Through Test
- 207% Higher Tear Strength
- 277% More Breaking Strength (MD)
- 280% Stronger in Peel Resistance Test
- 40% Lighter
Coverage & How Much You Need
This item is listed as 4 squares (400 sq ft) per roll. Use the project takeoff, manufacturer installation instructions, and expected waste/overlap to confirm the order quantity.
Compatibility / Fitment
Use this item only when the brand, model/MPN, size/color, sell unit, and system type match the project specification. Do not substitute it for a different felt underlayment, pack size, color, membrane/system family, or installation condition without checking the manufacturer instructions.
FAQs
What exactly am I ordering?
Atlas Gorilla Guard 30 Engineered Felt Underlayment 36" x 72' 4 Square/Roll, sold as RL, with SKU ATLGG and manufacturer model/MPN 557M200.
What model or part number should I match?
Match model/MPN 557M200 and confirm the brand is Atlas. If the job spec lists a different model, size, color, or system family, hold for review.
What unit is the price based on?
This listing is built around the RL sell unit. Confirm the unit before comparing price, quantity, or coverage.
How do I estimate quantity?
Use 4 squares (400 sq ft) per roll, then add waste or overlap per the manufacturer instructions and the project design.
What should be checked before purchase?
Confirm the model/MPN, sell unit, size/color, jobsite condition, compatible system components, and any manufacturer installation limits before approving the order.
Roofing and exterior-envelope work can involve fall hazards, weather exposure, fumes, adhesives, and system-specific installation requirements; follow the manufacturer instructions, OSHA-safe work practices, and local code or use a qualified contractor.
Product Expert Notes
Choose this item when Atlas model/MPN 557M200, SKU ATLGG, and the RL sell unit match the project requirement. It is best treated as an exact-match material selection, not a generic substitute.
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