Intertek Directory of Building Products

Malarkey - Secure Startâ„¢ HT Underlayment Company: Malarkey Roofing Products Code Compliance Research Reports: CCRR-0423

Secure Start™ HT is a self-adhered synthetic underlayment comprised of a modified bitumen membrane as the adhesive material on the sheathing side and a synthetic facer on the exposure side. The nominal weight of the underlayment is 19.3 pounds per 100 square feet and it is available in rolls measuring 36.75 inches wide and 66 feet long.

FIRE CLASSIFICATION

Class A Assemblies
Assembly No. E108-RFU-64349
Slope:
Deck Type:

Details:
2:12 or greater
Combustible
  • Minimum nominal 3/8” thick Type AC grade plywood
  • A single layer of Secure Start™ HT underlayment self-adhered to the plywood sheathing
  • 3-tab asphalt shingles Listed per ASTM D3462 with a minimum weight of 190 pounds per 100 square feet, mechanically fastened with 1-1/2 inch roofing nails through nailing strip, (4) per shingle

CODE COMPLIANCE RESEARCH REPORT
Evaluation Method Building Code CCRR No.
ASTM D1970
ICC-ES AC188
2024, 2021, 2018 IBC
2024, 2021, 2018 IRC
2023 FBC
CCRR-0423

The underlayment is also under Intertek's QA program for the following application:
 
Product FL Application No.
Secure Start™ HT FL 41901
Listing Report Return to Search
Attributes
CriteriaASTM E108 (2017)
CriteriaICC-ES AC188 (2015)
CriteriaASTM D1970 (2017)
CriteriaASTM E108 (2020a)
CSI Code07 30 05 Roofing Felt and Underlayment
Listing SectionROOFING MATERIALS
Spec ID64349
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