Norbord's TallWall(R) OSB Panels Offer Superior Energy Efficiency

Recent Testing Reveals that TallWall® Panels Reduce Wall Air Infiltration up
to 60 Percent

TORONTO, Nov. 9 /PRNewswire/ -- Norbord announced today that walls built with
Norbord's TallWall® panels show substantial reduction in air infiltration
compared to walls sheathed with conventional 4 feet by 8 feet horizontally
installed panels.

These findings are the result of a series of air infiltration tests conducted
for Norbord by the NAHB Research Center. The testing was conducted according
to ASTM E283 "Standard Test Method for Determining Rate of Air Leakage Through
Exterior Windows, Curtain Walls and Doors Under Specified Pressure Differences
Across the Specimen".

During testing, walls were constructed to simulate real walls (including an
interior electrical box, insulation, one-half-inch drywall on the interior
side and taped seams) to compare the effect of sheathing with typical 4 feet
by 8 feet panels to sheathing with Norbord's TallWall® panels. Both walls
were pressurized from the outside by a blower at three test pressure
differentials; house wrap was added and the test was repeated; the test was
repeated a third time with the house wrap sealed with seam tape.

Test findings demonstrated that TallWall® panels consistently reduced air
infiltration up to 60 percent compared with conventional panels installed
horizontally. TallWall® panels are clearly an excellent choice for builders
looking for cost effective solutions to improve the overall energy efficiency
of a home.

Norbord's innovative TallWall® is manufactured in 9 and 10 foot lengths.
Designed to cover walls from the top plate to the joist area, TallWall® OSB
wall sheathing not only reduces air leakage, it also helps lower material and
labor costs, produces less waste and can increase wall strength by up to 38
percent when panels overlap the joist area. The result is a stronger, more
energy efficient home.

TallWall is also available with either FSC or SFI Chain of Custody
Certification.

To learn more about Norbord's TallWall® panels and the Air Infiltration
Testing visit www.tallwallosb.com.

Norbord Profile
Norbord Inc. is an international producer of wood-based panels with assets of
$1.0 billion and sales of US $1.0 billion. Norbord has 15 operations the
United States, Europe and Canada. Norbord is a publicly traded company listed
on the Toronto Stock Exchange under the symbol NBD.

SOURCE Norbord Inc.

Doug McNeill, Norbord, +1-416-365-0705, Doug.McNeill@norbord.com, or Joslyn
Fagan, Function, +1-404-524-3075, Joslyn@functionatl.com