You are here:

Roofing/EDPM roofing / wet underlayment

Advertisement


Question
We have a EDPM roof that has been leaking to the point that it is like a waterbed underneath. I had a contractor tell me they could repair some screw holes and install turbines, coat the entire roof with a silicone spray/ brush on material. Should the old wet material come out before another material is applied?

Answer
Jim,

You should definitely determine the specific cause of the leak and correctly repair the defects in the roof membrane.  Part of the repair should be the removal of all wet materials below as entrapped water can lead to deterioration of your roof fastenings and the structure below.  Installing vents through the roof membrane has been proven to be not so effective in terms of drying and turbine vents will permit water passage during rain events.

Depending on the age and thickness of your roof membrane you might consider an appropriate repair with EPDM materials rather than a wholesale coating approach.  EPDM membranes do not need to be coated with anything to extend its life as the laps seams and details are generally the only failure mode.  A contractor versed in EPDM membranes can provide a more targeted repair that addresses these points rather than wasting money on coating perfectly good EPDM membrane.  Coatings have their place and purpose however, and not being able to completely evaluate your situation, my recommendation is general in nature.

Regards,

Bruce Ryan II, RRO
Professional Roof Consultants, Inc.

Roofing

All Answers


Answers by Expert:


Ask Experts

Volunteer


Bruce A. Ryan II, RRO

Expertise

I offer solid knowlege of all types of Commercial and Residential Roofing, Waterproofing, and, Building Envelope systems. Experience ranges across low slope and steep slope roof systems. I am also well versed in matters regarding condensation and ventilation. I enjoy donating some of my time and knowledge to the betterment of others.

Experience

Bruce Ryan has 20 years of roofing, waterproofing, and building envelope consulting experience with PRC, with 5 years of commercial roofing experience prior to joining the firm. He became Vice President of the company in 1998. Bruce Ryan plays a key role in the development of practical, long-term roofing and waterproofing solutions, along with implementation of on-site forensic studies. Bruce also has a high level of experience with regard to the impacts of roofing materials and construction for demanding clients with heavily occupied structures.

Organizations
Oregon Construction Contractors Board Construction Specifiers Institute National Roofing Contractors Association The Institute of Roofing, Waterproofing, & Building Envelope Professionals Oregon Board of Investigators Installation Masters

Education/Credentials
University of Maryland BS Business & Administration Registered Roof Observer - RCI Private Investigator Certified EIFS inspector - Northwest Wall and Ceiling Bureau Certified InstallationMaster™ - The Installation Masters™ Training and Certification Program (developed by American Architectural Manufacturers Association)

©2016 About.com. All rights reserved.