November 10, 2023

Dear valued Owens Corning® Canada Insulation customer:

Owens Corning Canada LP (“Owens Corning”) has updated the previously communicated price increase
to be effective with orders shipped on or after January 5, 2024, changed from prior date of October 2,
2023.

List prices will be increased as per the following schedule:

PINK NEXT GENTM FIBERGLAS® Insulation (includes Batts & Rolls) 8%
Basement BlanketTM Rolls 8%
QUIETZONE® Pink Next GenTM FIBERGLAS® Acoustic Insulation 8%

Loosefill:
PROPINK® FIBERGLAS® Blown Insulation 8%
Super-Pink R® FIBERGLAS® Blown Insulation 8%
AttiCat® Expanding Blown-In Insulation System 8%

This advanced notice is intended to give you ample time to plan your business accordingly.

Order confirmations for full truckload orders with an assigned ship date prior to January 5, 2024, will
receive current pricing. Full and Less-than-full truckload orders subject to consolidated shipping on or
after January 5, 2024, will receive the increased price.

New list price sheets will be issued shortly, and your Owens Corning Area Sales Manager will be
contacting you to review your new prices.

Your Insulation business is very important to Owens Corning Canada. Thank you for your continued
support.

Sincerely,