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FL #

FL48308

Application Type

New

Code Version

2023

Application Status

Approved

*Approved by DBPR. Approvals by DBPR shall be reviewed and ratified by the POC and/or the Commission if necessary.

Comments

Archived

Product Manufacturer

Owens Corning Roofing and Asphalt, LLC

Address/Phone/Email

One Owens Corning Parkway
Toledo, OH 43645
(740) 321-6345
Greg.Keeler@owenscorning.com

Authorized Signature

Keeler Greg
Greg.Keeler@owenscorning.com

Technical Representative

Greg Keeler

Address/Phone/Email

2790 Columbus Road
Granville, OH 43023
(740) 321-6345
greg.keeler@owenscorning.com

Quality Assurance Representative

Address/Phone/Email

Category

Roofing

Subcategory

Underlayments

Compliance Method

Certification Mark or Listing

Certification Agency

PRI Construction Materials Technologies

Validated By

Zachary R. Priest, P.E.

Validation Checklist - Hardcopy Received

Referenced Standard and Year (of Standard)

Standard	Year
ASTM D8257	2020
ASTM E108	2017

Equivalence of Product Standards
Certified By

Product Approval Method

Method 1 Option A

Date Submitted

07/09/2026

Date Validated

07/21/2026

Date Pending FBC Approval

Date Approved

07/24/2026

Summary of Products


FL #	Model, Number or Name	Description
48308.1	MasterGuard Synthetic Underlayment	MasterGuard Synthetic Underlayment is a mechanically attached polymeric roof underlayment used in steep slope roofing. Underlayment is manufactured as a woven sheet coated on both sides. Underlayment rolls have approximate dimensions of 286ft x 42in.
Limits of Use Approved for use in HVHZ: Yes Approved for use outside HVHZ: Yes Impact Resistant: N/A Design Pressure: N/A Other: Installation of MASTERGUARD™ Synthetic Underlayment shall be in accordance with FBC Section 1507.1.1, Table 1507.1.1.1 as appropriate, except in areas classified as high-velocity hurricane zone, where MASTERGUARD™ Synthetic Underlayment shall be fastened per 2023 FBC Section 1518.2 and 2023FRC Section R905.		Certification Agency Certificate FL48308_R0_C_CAC_Certificate 1378C-1 MasterGuard Synthetic Underlayment.pdf Quality Assurance Contract Expiration Date 12/31/2027 Installation Instructions FL48308_R0_II_Masterguard Installation Instructions-1.pdf Verified By: PRI Construction Materials Technologies Created by Independent Third Party: Evaluation Reports Created by Independent Third Party:

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Contact Us :: 2601 Blair Stone Road, Tallahassee FL 32399 Phone: 850-487-1824

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Under Florida law, email addresses are public records. If you do not want your e-mail address released in response to a public-records request, do not send electronic mail to this entity. Instead, contact the office by phone or by traditional mail. If you have any questions, please contact 850.487.1395. *Pursuant to Section 455.275(1), Florida Statutes, effective October 1, 2012, licensees licensed under Chapter 455, F.S. must provide the Department with an email address if they have one. The emails provided may be used for official communication with the licensee. However email addresses are public record. If you do not wish to supply a personal address, please provide the Department with an email address which can be made available to the public. To determine if you are a licensee under Chapter 455, F.S., please click here .

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