Malarkey SecureStart SG Synthetic Underlayment, 10 Squares Per Roll, Gray

Malarkey SecureStart SG is a gray synthetic underlayment delivered in a roll covering 10 squares. It serves as the steep-slope underlayment layer beneath asphalt shingle roof systems. One roll per order; use it as the full field layer over the deck and beneath Malarkey shingles.

Key Features:

• High coverage roll: Each roll covers 10 squares of roof area.
• Synthetic fabric: Synthetic underlayment in the SecureStart line.
• Gray surfacing: Supplied in gray.
• Steep slope rated use: Listed for steep-slope roofing underlayment applications.
• Malarkey system match: Intended for use within Malarkey shingle roof systems.

Specifications Table:

Coverage & How Much You Need:

One roll covers 10 squares (1,000 sq ft) nominal; laps at side and end seams reduce net coverage. Divide your deck area by 10 squares per roll and add allowance for laps and waste.

Fit and Compatibility:

Install under Malarkey asphalt shingle systems; shingles and starter material are sold separately. Follow the manufacturer’s underlayment layout for the chosen shingle.

Frequently Asked Questions (FAQ):

Q: How much does one roll cover?
A: One roll covers 10 squares (1,000 sq ft) nominal.

Q: Is it synthetic?
A: Yes, SecureStart SG is a synthetic underlayment.

Q: What color is it?
A: Gray.

Q: How many rolls do I need?
A: Divide your roof deck area in squares by 10 and round up for laps and waste.

Q: What else do I need for the roof?
A: Starter shingles, field shingles and accessory materials are sold separately.

Expert Verdict Reviewed by the SuperArbor Pro Desk

A 10-square roll covers a typical residential roof with fewer seams than lower-coverage products, speeding installation on larger decks. Synthetic underlayment is lighter and more tear-resistant in foot traffic than traditional felts, but keep laps per the manufacturer’s layout. Pair with Malarkey starter and shingles for a matched system.

Synthetic underlayment surfaces can be slippery, especially on slopes or when wet; wear appropriate footwear and fall protection.

Order Malarkey SecureStart SG 10-square underlayment rolls for your next shingle roof.