Work Item
ASTM WK78365

New Test Method for Determining Walkability of Steep-slope Underlayments

1. Scope

This test covers the determination of slip resistance of asphalt-based and polymer-based steep-slope underlayments


asphaltic; felt; polymeric; organic; inorganic; fiber-reinforced; polyethylene; polypropolene; synthetic


A test method for walkability--most recently--comes from the development of the Synthetic Underlayment standard (quire recent initial publication). Negatives about slip resistance of these products were unresolved until Matt Dupuis and I volunteered to chair a TG to develop/reinvent a test method for slip resistance of steep-slope underlayments. This is important for manufacturers and contractors for rooftop safety of workers. Manufacturers will be able to list Walkability / Slip Resistance as a physical property of underlayments so users of products can compare Walkability from product to product.

The title and scope are in draft form and are under development within this ASTM Committee.


Developed by Subcommittee: D08.02

Committee: D08

Staff Manager: Jamie Huffnagle

Work Item Status

Date Initiated: 09-20-2021

Technical Contact: Sudhakar Molleti

Item: 001

Ballot: D08.02 (23-01)

Status: Will Reballot Item