Owens Corning — Director's Dealing 2011

May 27, 2011

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Owens Corning (OC)
CIK: 0001370946
Period of Report: 2011-05-25

Reporting Person: Mayer Mark W (VP & Chief Acctg. Officer)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2011-05-25	$.01 Par Value Common	M	2450	$13.89	Acquired	18953	Direct
2011-05-25	$.01 Par Value Common	M	200	$25.45	Acquired	19153	Direct
2011-05-25	$.01 Par Value Common	S	2450	$36.00	Disposed	16703	Direct
2011-05-25	$.01 Par Value Common	S	200	$36.00	Disposed	16503	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2011-05-25	Stock Option (right to purchase)	$13.89	M	2450	Disposed	2019-02-04	Common Stock (2450)	Direct
2011-05-25	Stock Option (right to purchase)	$25.45	M	200	Disposed	2020-02-03	Common Stock (200)	Direct

Footnotes

F1: The options, representing a right to purchase a total of 4,900 shares, become exercisable in four equal installments beginning on February 4, 2010.

F2: The options, representing a right to purchase a toal of 800 shares, become exercisable in four equal installments beginning on February 3, 2011.