MFM-Building-Products IB-3 ShingleStarter.png

IB-3 ShingleStarter™ is a 50 mil, self-adhering shingle-starter roofing underlayment. It serves the dual function of replacing conventional starter strips, as well as providing ice and water dam protection in cold climates. IB-3 ShingleStarter has a mineral surface for excellent foot traction.

IB-3 ShingleStarter™ has two self-sealing tabs, each 1.5" nominally from each edge for good adhesion. IB-3 ShingleStarter™ installs under roofing at the edges and valleys to protect from leaks due to ice dams, meltingsnow and blowing rain. IB-3 ShingleStarter™ is suitable for use in new construction and reroofing. 

IB-3 ShingleStarter Features

  • 50 mil nominal thickness

  • Self-sealing tabs on each edge for good adhesion

  • Installs in temperatures above 40°F

  • Minimum slope for installation is 2" per foot

  • Applies easily at eaves, valleys, vents, skylights and chimneys

  • Easy to remove split release liner for fast installation and ideal for valley applications

  • Self-seals around common fasteners

  • May be left exposed for up to 30 days

  • 5-Year limited warranty


  • ASTM D 1970

  • ICC-ES ESR 1737

  • Florida Building Code FL 11842.1

  • Miami-Dade County Approved

  • Texas Department of Insurance Listed


IB-3 ShingleStarter™

ProductProduct IDSizeUnits/CartonCarton Wt.
IB-3 ShingleStarter4733636” x 67’168 lbs
MFM IB-3 ShingleStarter™

Roll Size: 36" x 67' (2 Square)