HowLong

When a customer who is thinking of reroofing asks you this question, what ans\Mer have you got for him ?

You could say: "l don't know," or, "lt all depends," which signifies that you really don't know, or you could come to the scratch by asking if he means a"Weaoer" Rirof.

Let him agree *ith you that the life of roofing depends entirely on the nature of the raw material used, and the method of manufacture. Then, tell him that you know for a fact that

WbCI 'scues (yuerlwad'

is made of the highest grade of genuine rag feltthat the ]'Weaoer" processing has been worked out by ceaseless experimentation over a period of twenty years.

To clinch the deal, explain the..Weaoer" guarantee.

Of course, you'll get the business.

Weaver Roof Company

(Continued from Page 32.)

"So we are changing our method, and will pay our managers one-half of one per cent on tteir cash sales, and 8 per cent of the net profits.

"We believe ttat thil will make the mamagers.work hard for cash business, for good profits, and for safe sales.

"We have considered a sliding scale of commissions increasing and percentages ar the profits increase, but it aeemed to us b€st to put a premium on caeh sales and on safe profits.tt

Kiln Drying Douglas Fir Successfully

A recent report of the Forest Service, based on research done in cooperation with the West Coast Lumbermen's Association at the plant of the Wheeler-Osgood Company in Tacoma, indicates that it is entirely practical to kilnclry No. I common Douglas fir boards and dimension. Heretofore the kiln-drying of these grades has been held impractical because of the damage done t,o the lumber by the methods used. The present practice of lumber manufacturers is to air-dry Douglas fir common, or to ship it ,green.

The kiln-drying of Douglas fir common promises to become one of the most effective measures for conserving this material, by reducing the l.osses now occurring with air drying and rnachining. The saving to be gained in lower freight rates through shipping dry lumber instead of partially wet lumber will not onlv greatly benefit the lumber manufacturer, but eventtrally the .consu,ming public, and moreover will permit a wider distribution of this fine structural 'material, the report states.

.'fle bll-n-drying of Douglas fir common is a problem which differs in several reipects from most kiln-drvine problems. .In order that the knots shall not drop "rit "? the wood, the maxirr-rum temperature must be l.imited more or less by the melting point bf the resin around the knots, and the humidity kept high enough so as not to allow ex_ cessive differential shrinkage between the knots and the body wood. The difficulty of keeping the knots in place is lessened to some extent by the fict-that it is usuallv not necessary to dry common lumber to a moisture content lower tha.n 15 per cent. A new complication is added, however, ,in,asmuch as it is very difficult io bring heartwood and sapr,r'ood' to a uniform - moisture contJnt as hieh as,_1.5 per cent by any ordinary kiln-drying meth.od.

.

'Ihese unu3ual requirements-demand iha-t a kiln for dry_ ing Douglas fir common shall have a very rapid and urii_ form circulation, readily reversible in direition, and an ac_ curate control of temperature and humiditv. The onlv lype.of kiln which at present can be safely rec,ommendei for this class of work is an internal-fan kili similar to the semi-commercial unit in operation at the Forest products Laboratory, Madison, Wisconsin, or to the kiln used bv the laboratory at Tacoma, Washington, in develooine' the schedules for the drying of No. I Douglas fir commo"n.