UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington D.C., 20549

Form 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d)

of the Securities Exchange Act of 1934

Date Of Report (Date Of Earliest Event Reported): November 4, 2014

Owens Corning

(Exact Name of Registrant as Specified in its Charter)

Commission File Number: 1-33100

One Owens Corning Parkway

Toledo, OH 43659

(Address of Principal Executive Offices, Including Zip Code)

419-248-8000

(Registrant’s Telephone Number, Including Area Code)

(Former name or former address, if changed since last report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

On November 4, 2014, Owens Corning (the “Company”) entered into an Underwriting Agreement with Goldman, Sachs & Co., J.P. Morgan Securities LLC and Wells Fargo Securities, LLC, as representatives of the several underwriters named therein, and the subsidiary guarantors named therein with respect to the offering and sale by the Company of $400,000,000 aggregate principal amount of 4.20% Senior Notes due 2024 (the “Notes”) under the Company’s Registration Statement on Form S-3 (Registration No. 333-179524) that the Company filed with the Securities and Exchange Commission on February 16, 2012. The Company has filed with the Securities and Exchange Commission a prospectus supplement, dated November 4, 2014, in connection with the public offering of the Notes. The Underwriting Agreement is filed as Exhibit 1.1 to this Current Report on Form 8-K and is incorporated herein by reference.

The sale of the Notes closed on November 12, 2014. The Notes were issued pursuant to an Indenture, dated as of June 2, 2009, among the Company, the subsidiary guarantors named therein and Wells Fargo Bank, National Association, as trustee (the “Trustee”), as supplemented and amended by the First Supplemental Indenture, dated as of June 8, 2009, by and among the Company, the subsidiary guarantors party thereto and the Trustee, the Second Supplemental Indenture, dated as of May 26, 2010, by and among the Company, the subsidiary guarantors party thereto and the Trustee, the Third Supplemental Indenture, dated as of October 22, 2012, by and among the Company, the subsidiary guarantors party thereto and the Trustee, and the Fourth Supplemental Indenture, dated as of November 12, 2014 (the “Fourth Supplemental Indenture”), by and among the Company, the subsidiary guarantors party thereto and the Trustee.

The Notes are fully and unconditionally guaranteed, jointly and severally, by each of the Company’s current and future domestic subsidiaries (the “Guarantors”) that is a borrower or guarantor under the Company’s Credit Agreement (as defined in the Fourth Supplemental Indenture). The Notes and the guarantees by the Guarantors will be the general senior unsecured obligations of the Company and the Guarantors, respectively. They will rank equally in right of payment with the existing and future senior unsecured indebtedness of the Company and the Guarantors, respectively.

For a complete description of the terms and conditions of the Notes and the guarantees, please refer to the Fourth Supplemental Indenture and the form of Note and Notation of Guarantee, which are incorporated herein by reference and filed with this Current Report on Form 8-K as Exhibits 4.1 and 4.2, respectively.

In connection with the issuance of the Notes, Sidley Austin LLP, Stites & Harbison, PLLC and Reinhart Boerner Van Deuren s.c. provided the Company with the legal opinions attached to this Current Report on Form 8-K as Exhibits 5.1, 5.2 and 5.3.

(d) Exhibits.

SIGNATURE

Pursuant to the Requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this Report to be signed on its behalf by the Undersigned hereunto duly authorized.

EXHIBIT INDEX