CertainTeed Glasbase Base Sheet Black 39-3/8″ x 98′ 9″

The CertainTeed Glasbase Base Sheet Black 39-3/8″ x 98′ 9″ is a bur & mb systems for jobs that require CertainTeed model/MPN 619784 in the RL sell unit. CertainTeed Glasbase Base Sheet is designed for use as a base sheet for both hot and cold applied, inorganic built-up roofing systems

Key Specs

• Brand: CertainTeed
• Model / MPN: 619784
• SKU: CERBGB
• Sell unit: RL
• Product type: BUR & MB Systems
• Size / color: 39-3/8″ x 98′ 9″
• Category: Commercial Roofing | Commercial Roofing/Membranes | Commercial Roofing/Membranes/BUR & MB Systems
• Coverage / unit: 3 squares (300 sq ft) per roll

Key Features

• It is suitable for use in the construction of various types of membranes for both new construction and reroofing, over a variety of substrates
• Glasbase Base sheet will provide additional strength, moisture resistance and asphalt uniformity when used as the first ply over nailable, non-nailable and insulated substrates. In addition, it will perform as a venting base sheet when spot mopped over pl
• The fiberglass mat provides excellent strength and moisture resistance. Glasbase Base Sheet is pliable and will conform to most surfaces for ease of application

Coverage & How Much You Need

This item is listed as 3 squares (300 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 bur & mb systems, pack size, color, membrane/system family, or installation condition without checking the manufacturer instructions.

FAQs

What exactly am I ordering?

CertainTeed Glasbase Base Sheet Black 39-3/8″ x 98′ 9″, sold as RL, with SKU CERBGB and manufacturer model/MPN 619784.

What model or part number should I match?

Match model/MPN 619784 and confirm the brand is CertainTeed. 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 3 squares (300 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.

Verify the manufacturer instructions, local code, and project specification before installation or substitution.

Product Expert Notes

Choose this item when CertainTeed model/MPN 619784, SKU CERBGB, and the RL sell unit match the project requirement. It is best treated as an exact-match material selection, not a generic substitute.