
Guarantees and Technical Support
The Expertise You Need Is Always Available at (800) 922-5922
Working with today’s commercial roofs is more complex than ever and requires considerable technical and industry knowledge. At JM, we emphasize taking on the roof as a complete system. Our highly skilled technicians and engineers provide essential support services throughout the project lifecycle, from the early design stages to the completion of the bid package.
We feature diverse and comprehensive support services that can include:- Conceptual product information
- Building science
- Wind uplift data
- National and local code understanding
- FM Global® and UL® regulations
- Request quote from Tapered Design Team
- Fastening patterns and sheet layouts
- Installation guidelines
- Standard and custom details
JM Peak Advantage Guarantees and Warranties
JM offers roofing warranties and 10-, 15-, 20-, 25- and 30-year No Dollar Limit (NDL) roofing guarantees, depending on the roof system selected. Even if you never have cause to fall back on the JM Peak Advantage® Guarantee,
Johns Manville Roofing Services provides you with additional value by offering technical assistance to the building owner throughout the life of the agreement.
- Expert installation by approved JM contractors
- Advanced technical assistance
- Timely issuance of all guarantee documents
- Efficient processing of any claims or complaints
- Prompt service from highly trained personnel
- Material Warranty
- Understanding Your JM Peak Advantage Guarantee Overview
- Peak Advantage Guarantee Specimen
- Bituminous Systems – Charges and Requirements
- JM Peak Advantage Guarantee Solar Installation Policy
You can also visit the Guarantees & Warranties section of the Roofing Toolbox to view additional documentation.

