Technical Bulletin 2016-5WLS – Evaluating Concrete Decks in Preparation for Roofing & Waterproofing Application

The bulletin provides basic guidelines for evaluating new and existing concrete decks, prior to roofing or waterproofing system application.

WSRCA has received additional reports from member contractors describing problems with concrete decks, and waterproofing and roofing membranes maintaining adhesion to concrete decks. As such, WSRCA's Waterproofing and Low-Slope Roofing Committees have collaborated on this Technical Bulletin to provide basic guidelines for evaluating new and existing concrete decks, prior to roofing or waterproofing system application. Factors that can affect short-term and long-term adhesion of roofing and waterproofing systems to concrete decks include the dryness of the deck surface and actual moisture content of the core (i.e., inner portion) of the concrete, the concrete’s surface profile or finish, and the presence of certain curing compounds, surfacing agents and/or other additives in the concrete mix.

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WSRCA Waterproofing Committee Andy Clarke - Chairman, Classic Roofing LLC

Steve Reardon - Vice Chairman, Enterprise Roofing

Leo Ibarra - Lowe Roofing, Inc.

Tom Asbury - Summit Roofing Services

Everett Martin - Empire Roofing, Inc.

Chuck Chapman - Tecta America Arizona, LLC

Jim Carlson - Technical Advisor, Building Envelope Technology & Research

WSRCA Low-Slope Committee Mike Wakerling - Chairman, General Roofing Company

Rob Winkle - Vice Chairman, Roof Asset Management

Tom Asbury - Summit Roofing Services

Chuck Chapman - Tecta America Arizona, LLC

Andy Clarke - Classic Roofing LLC

Darin Douglas - Lowe Roofing, Inc.

George Madsen - Madsen Roofing Company

Everett Martin - Empire Roofing, Inc.

Bruce Radenbaugh - Bilt-Well Roofing & Solar

Stan Robinson - Pacific West Roofing

Kris Hitesman - Capitol Roofing Service