Weyerhauser Introduces New Insulating Wall Board

(Continued from Page 44) i wrapping also gives it a far neater appearancb in storage in the last two years. These sales and the use of the than if it were unwrapped. board following them have assisted the developers in per-

According to Howard F. Weiss, former director of the U. S. Forest Products Laboratory, now connected with the C. F. Burgess Laboratories at Madison, 'Wis., who was active-in the development of both materials, Nu-Wood has not the full insulating value of Balsam-'Wool, but possesses other qualities w,hich admit it to uses for which the blanket type is not fitted.

"Tests of its strength, resistance to the transmission of heat, ability to absorb sound, and expansion and contraction under various conditions, show the board to be capable of meeting the most exacting specifications." said Mr. Weiss.

"Being rigid, it cannot, of course, be tucked between studding and joints or into out-of-the-way places like the blanket. ,, Furtherr"nore, although it is an excellent non' conductor of heat; it is, like all other board-forms of insulation, less efficient an insulator than the blanket form. No rigid product can equal a flexible one in insulating Y+e' becauie of the greater densily required to insure rigidity. However, this board is a genuine and effective barrier to heat and cold and can be used with complete satisfaction wherever a board-form of insulation is desired.

"Due to its water-resistance and to the fact that it is formed of fibres laid down in all directions and not in one olane only. as occurs when fibres are laid down on a movit s scre.;I, Nu-Wood shows remarkable freedom from exoaision and contraction even when exposed to severe 6utside weather conditions. Thus it makes an excellent base for plaster. This peculiar characteristic is of great value in idapting the board to use as a core for veneer sirrfaces, and panels so treated have withstood the cracking and warping so frequently experienced with other types of-cores. fhe -fact that only the best northeru woods are used in its fabrication contributes to its high quality."

Before Nu-Wood was announced !o the public it was tested thoroughly, both in the laboratories and in actual construction. -It has been applied successfully to industrial roof decks for insulation and to prevent condensation of moisture. It also has been used extengively as an insulating wall board and plaster base in dwelling houses.

While distribution of the new insulator under its trade name has just recently-been formally announced, Nu-Wood is not entirely new. -Considerable interest has surrounded ii l"ti"J thJ five years of experimentation and development wdrk from which it now emerges. Much of it has bien sola to and through lumber dealers in the Northwest fecting the product before offering it generally as a thoroughly tested, practical material.

Packaging of Nt+Wood erpedites handli*g at the nill ond at ever! other stel of its wol to the building-site. The eose of handlifts and anarehousing tlte material in this form aill appeal to tbe lumber retailers utho hnow how their oaerhcad is increased by ho*tllingcharges on srmll-unit itens.