"Since JM is the only manufacturer with the ability to produce this
combination of asphalt and nonwoven polyester, we can offer builders and
contractors this innovative product that provides the performance of
synthetics with the benefits and value of felt, while also providing the
industry's most efficient installation process," said Zain Mahmood, vice
president and general manager, Construction Materials + Systems for JM's
Engineered Products Group.

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5 seeds per grams has
been the 'tipping point' level this marketplace needs to transform to a new
technology -- and SE 8400 truly delivers that solution," said Wisdom Dzotsi,
Owens Corning Global Product Manager, T30 Direct Roving. Additional information is available on Owens Corning's Web site at
http://www.

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jm. and Etowah, Tenn.

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, Waterville, Ohio,
Richland, Miss.
"The major insulator manufacturers have paid particular attention to sealing
the end fitting of the FRP rod, silicone rubber housing junction and several
have designed redundant seal systems.
"Owens Corning has solved that problem with their Advantex corrosion
resistant E-glass fiber that is low in seed count .

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Advantex(R) Type30(R) Roving Provides Non-Corrosive, Dielectric Properties
for Pultruded High-Voltage Electrical Transmission + Distribution Applications;
Prevents Brittle Fracture

PARIS, At the JEC Composites Show, Owens Corning
today introduced SE 8400 LS, a new single -end Type 30(R) roving to meet the
demanding electrical requirements for such pultruded FRP applications as
medium- and high-voltage transmission and distribution (T+D) long-rod
insulators. SE 8400 LS combines the anti-corrosion, electrical, and
mechanical benefits of boron free Advantex(R) E-glass manufactured using
state-of-the-art glass melting technology and advanced low-seed filament
technologies , ensuring seed levels well below .

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"Gorilla Wrap is another example of JM's commitment to the continuous
improvement of our building products offerings and the performance of all
aspects of the building envelope," said Stephan.

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Johns Manville Rolls Out Two New Unique High-Performance Building Products - Translucent Gorilla Wrap and DuraBase Roofing Underlayment

5 billion and holds leadership positions in all of the key
markets that it serves.

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Gorilla Wrap
Gorilla Wrap(TM ) is a non-perforated, nonwoven polymeric housewrap
material that decreases air infiltration resulting in increased energy
efficiency and maximum moisture control."
Unlike most housewraps on the market, Gorilla Wrap is non-perforated,
reducing the potential for bulk water penetration and allowing trapped
moisture to escape, thus reducing concerns about mold and mildew growth. "Avoiding moisture ingress
has been and will continue to be the first line of defense in preventing
brittle fracture . Brittle fracture is a primary concern of the utility
engineer when evaluating the use of composite insulators," said James
Schmiedeknecht, VP International Sales and Marketing at MacLean Power Systems . Insulator manufacturers
like MacLean Power Systems can now take full advantage of boron free glass
fibers and also have wicking performance comparable to standard E-glass.

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"Creating solutions for building science problems that benefit our
customers is our highest priority," said Mahmood.

"DuraBase is a
next-generation product that provides superior performance and value for our
customers who want the best of both worlds in roofing underlayment materials."
DuraBase creates highly -efficient installation processes because it
unrolls flat in warm and cold weather, weighs less than felt and provides
greater coverage per roll, which all means faster installation and less effort
and hassle to transport and handle the product on rooftops.

Owens Corning Introduces New SE 8400 Low Seed Single-End Continuous Roving for High-Voltage Applications

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It also offers greater waterproofing performance and better protection
as it also seals around nails.
After extensive beta testing , customers agree.
Owens Corning SE 8400 LS roving is available in 113 yield (4400 TEX), 103
yield (4800 TEX), and 52 yield (9600 TEX).

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A, BRK. Johns Manville employs approximately 8,500 people and
operates 43 manufacturing facilities in North America, Europe and China.

owenscorning .

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Johns Manville's (JM) Engineered Products
Group, a global leader in the nonwoven industry, is responding to builders'
needs by introducing two new products -- Gorilla Wrap(TM), a translucent,
non-perforated housewrap and DuraBase(TM), an asphalt and nonwoven polyester
roofing underlayment. Gorilla Wrap 's superior strength,
with a tear resistance that is 300 percent higher than the leading housewrap ,
reduces builder concern during installation and makes it one of the most
durable housewrap products on the market. In
addition, the non-perforated material keeps wood sheathing drier, reducing the
potential for rot and degradation within the wall cavity.
The Engineered Products Group (EPG ), one of Johns Manville's four
strategic business units, produces glass fibers, glass fiber nonwovens ,
polyester spunbonds, meltblowns and glass fiber wall coverings at
14 manufacturing locations worldwide: Spartanburg, S. Minimizing
microscopic bubble voids or "seeds" in the glass avoids the formation of
hollow filaments, which increase conductance, offering the path of least
resistance to the electrical energy, and causing system failure.

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The 52 yield requires fewer ends
of roving to produce a part of equal glass content, a significant advantage
for pultrusion manufacturers with building or creel size restrictions, who
wish to produce larger parts.
Owens Corning is a world leader in building materials systems and
composite systems.

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6 billion in
2004 .

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lamination nonwoven

needlepunch hanseatic

com/builder. Helens, UK, Oskarstrom and
Helsingborg, Sweden; Trnava, Slovakia; and Shanghai, China .
MacLean Power Systems can now offer the utility engineer that extra margin of
safety at a relatively low incremental cost," Schmiedeknecht concluded.com .

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They're demanding building products that provide superior performance and
value, while also offering more-efficient installation and greater
energy -efficiency performance.

DuraBase
The unique composition of Johns Manville's new DuraBase (TM) roofing
underlayment employs the proven technology of asphalt with a new
high-performance nonwoven polyester reinforcement. 3772, or go
to http://www.

About Johns Manville
Johns Manville, a Berkshire Hathaway company (NYSE: BRK.B), is a
leading manufacturer and marketer of premium-quality building and specialty
products.
The properties of SE 8400 LS single-end Type 30 roving offers not only the
required exceptionally high electrical resistance from low seed production but
also:

* higher corrosion and temperature resistance of Advantex over
conventional E-glass, reducing brittle fracture failure
* quicker processing than alternatives owing to fast wet-out in polyester,
vinyl ester and epoxy resins
* low migration for improved wet-out and glass to resin bonding
* improved flashover resistance in highly polluted areas
* high mechanical strength (weight ratio)
* greater design flexibility and overall system costs reduction

"While the industry has been working with non-ceramic insulators for
several years, developing and ensuring the consistent manufacture of a non-
corrosive, boron-free glass with seed counts well below .

This category list companies active in the import and export of nonwoven rollgoods only.

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The durability of the material enables DuraBase to hold nails better and
provides greater tear strength and puncture resistance than synthetics or
felt.5 seeds/gram.

(R) Owens Corning and Advantex are registered trademarks of Owens Corning.

lamination rollgoods

JM is rolling out Gorilla Wrap and DuraBase at the
National Association of Home Builders 2006 International Builders' Show,
January 11-14 , 2006, in Orlando, Fla.
"Strength, quality, superior performance and builder value are the
hallmarks of our products, and we know our customers are very excited about
having these two new products available to them," said Mahmood.C., in the United States; Berlin, Bobingen,
Karlstein, Steinach and Wertheim , Germany; St.
"The use of boron free glass fibers has been a long acknowledged means of
preventing brittle fracture if an insulator's housing has been breached.
However, earlier generations of boron free fibers had seed count levels that
were too high and wouldn't consistently pass qualification tests mandated by
insulator standards," continued Schmiedeknecht. Owens Corning is exhibiting in
Hall 1 Booth M42/N55. Founded in 1938, the company had sales of $5.

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DENVER, Builders and contractors are constantly
seeking ways to build better homes and improve the overall building envelope. DuraBase 's enhanced ultraviolet resistance
allows longer exposure to the sun (up to six months) without performance
deterioration. In business since 1858, the Denver-based company has annual sales
of approximately $2.

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"Combined with its tear strength and superior ultraviolet inhibitors that
allow at least six months exposure time, Gorilla Wrap gives builders greater
peace of mind and increased flexibility with job scheduling," said Fred
Stephan, vice president and general manager, High Performance Nonwovens for
JM's Engineered Products Group. "And since Gorilla Wrap is translucent, it
also enhances and eases installation by enabling contractors to see studs,
nails and windows on the home's framing beneath the housewrap.
For more information on these products call 800-251-1660, ext.

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The JEC Composites Show (5-7 April, 2005) is known as the global venue for
the introduction of new technologies in composites and is held annually at the
Expo Porte de Versailles, Paris, France.