Intertek Directory of Building Products

MaxFelt™ 30, MaxFelt™ XT, and MaxFelt™ 15 Roofing Underlayments Company: Max Roofing Products, LLC Code Compliance Research Reports: CCRR-1036

MaxFelt™ 30 is a mechanically attached synthetic underlayment comprised of a polypropylene woven scrim coated on both sides with a polypropylene non-woven scrim on the exposed side. The underlayment is green on the exposed side and black on the sheathing side, and has an overall weight of 2.56 pounds per 100 square feet.  The underlayment is available in rolls of 48 in. wide by 250 ft. long.

MaxFelt™ XT is a mechanically attached synthetic underlayment comprised of a polypropylene woven scrim coated on both sides with a polypropylene non-woven scrim on the exposed side. The underlayment is black in color and has an overall weight of 2.05 pounds per 100 square feet. The underlayment is available in rolls of 48 in. wide by 250 ft. long.

MaxFelt™ 15 is a mechanically attached synthetic underlayment comprised of a polypropylene woven scrim coated on both sides with a polypropylene non-woven scrim on the exposed side. The underlayment is black in color and has an overall weight of 1.74 pounds per 100 square feet. The underlayment is available in rolls of 48 in. wide by 250 ft. long.

PHYSICAL RATINGS
PRODUCT TEST METHOD TEST PROCEDURE RESULTS
MaxFelt 30, MaxFelt XT, and MaxFelt 15 Synthetic Roofing Underlayments ASTM D226 Unroll-ability Meets Type II
Breaking Strength Meets Type II
Pliability Meets Type II
Loss on Heating Meets Type II
CSA A123.3 Unroll-ability Meets Type 3
Breaking Strength Meets Type 3
Pliability Meets Type 3
Loss on Heating Meets Type 3
Liquid Water Transmission Meets Type 3
ASTM D4869 Unroll-ability Meets Type IV
Breaking Strength Meets Type IV
Pliability Meets Type IV
Loss on Heating Meets Type IV
Liquid Water Transmission Meets Type IV
Tear Strength Meets Type IV
Dimensional Stability Meets Type IV
CAN/CSA A220 All test procedures applicable to underlayments for use in areas having 3500 degree days or less below 18 degrees Meets Standard Requirements


FIRE CLASSIFICATION
 
Class A Assemblies
Assembly No. E108-RFU-45801
Slope:
Deck Type:
Details:





 		 2:12 or greater
Combustible
  • Minimum nominal 15/32” thick Code Compliant exterior grade plywood
  • A single layer of MaxFelt™ 30, MaxFelt™ XT, or MaxFelt™ 15 roofing underlayment mechanically fastened to the plywood sheathing every 12 inch oc in the field and on the perimeter using plastic cap nails
  • Asphalt shingles Listed per ASTM D3462 with a minimum weight of 190 pounds per 100 square feet installed per manufacturer’s installation instructions

 
CODE COMPLIANCE RESEARCH REPORT
Evaluation Method Building Code CCRR Number
ICC-ES AC188
ASTM D8257
ASTM E108
UL 790		 2024, 2021, and 2018 IBC
2024, 2021, and 2018 IRC
2024 IWUIC
2023 FBC
2025, 2022 CBC
2025, 2022 CRC
2025 CWUIC
2023 LABC
2023 LARC		 CCRR-1036
 
Florida Product Approval
Report Number Product Covered
FL No. 29705 MaxFelt 15, MaxFelt XT and MaxFelt 30
Listing Report Return to Search
Attributes
CriteriaCAN / CSA A220 Series-06 (R2012)
CriteriaICC-ES AC188 (2015)
CriteriaUL 790 (2004) Ed. 8 (R2018)
CriteriaASTM D8257/D8257M (2022)
CriteriaASTM E108 (2020a)
CSI Code07 30 05 Roofing Felt and Underlayment
Listing SectionROOFING MATERIALS
Spec ID45801
Design Documents
No Results
Code Compliance Research Reports
Public Documents
No Results
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