Malarkey 406 SecureStart HT Steep Slope Roofing Underlayment, 2 Square Roll

Malarkey Roofing 406 SecureStart HT is a steep slope roofing underlayment supplied as a 2 square roll, which is the sell unit. Install it over the roof deck beneath Malarkey shingles or other steep slope coverings. Pair with Malarkey starter and hip-and-ridge products for a complete system.

Key Features:

• SecureStart HT: Part of the Malarkey SecureStart HT underlayment line (No. 406).
• 2 square roll: Each roll provides 2 squares of coverage.
• Steep slope use: Designed as steep slope roofing underlayment.
• Manufacturer support: Manufactured by Malarkey Roofing Products (Holcim).
• Roll format: Sold by the roll for straightforward staging and install.

Specifications Table:

Coverage & How Much You Need:

One roll covers 2 squares (200 sq ft nominal) of deck before laps and waste. Add rolls for overlaps per the shingle manufacturer’s instructions.

Fit and Compatibility:

Designed for use under Malarkey shingle systems and other steep slope roof coverings. Malarkey starter, hip-and-ridge and sealants are sold separately.

Frequently Asked Questions (FAQ):

Q: What is included?
A: One roll of Malarkey 406 SecureStart HT underlayment covering 2 squares.

Q: How many rolls per roofing square count?
A: One roll per 2 squares; add rolls for laps and waste.

Q: Can I use it under non-Malarkey shingles?
A: It is listed as steep slope roofing underlayment; verify the shingle manufacturer allows it for their system.

Q: Is it self-adhered?
A: The sources do not state an adhesive backing; confirm installation method from manufacturer literature.

Expert Verdict Reviewed by the SuperArbor Pro Desk

SecureStart HT is sized at 2 squares per roll, so it handles quickly on steep pitches and small planes like dormers. Follow Malarkey’s underlayment application instructions to keep the shingle system warranty intact. Keep rolls dry and off the ground before use.

Use fall protection and slip-resistant footwear; synthetic and felt underlayments are slippery when wet or dusty.

Order Malarkey 406 SecureStart HT underlayment rolls for your next shingle roof.