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L. A. Metropoliton

Areq Leqds Nqtion ln Dwelling Unit Sfqils

Dwelling unit construction starts in the Los Angeles metropolitan area are running five percent higher than the national averag'e and this lead is expected to grow even larger by the end of the decade.

Dwelling unit construction starts are predicted by the Chamber's Research Committee to increase 41.8 percent by 1970 to an estimated 117,000 new units a year!

National average increase by l97O will be 36.7 per cent, or 1,750 units, according to the Committee.

Home building through the two-county area-and the construction of schools, churches and commercial buildings which serve the homes' occupants-has for many years contributed greatly to the eco,nomy of the Southland.

Norm wendt" u"n" courch.ine

In I96f, builders started 82,500 new dwelling units, to laad the nation's metropolitan areas in such construction.

The Committee's projections are computed on the basis of latest population projections and the history of building activities in the two-county area.

The New York, New Jersey, Greater New York Area, the only similar area close to Los Angeles' 1960 residential construction starts, reported U,370 starts that year.

In 1960, value of builder-controlled co'nstruction throughout the Los Angeles metropolitan area was reported at $1, 190,000,000 f or new residential construction ; $3 10,000,000 for remodeling; and $524,000,000 for construction of new, light non-residential buildings.

The Chamber's Research Committee forecasts a 51.26 percent rise by l97O in the value of new residential construction to $1,800,000,000. And, an 80.65 percent increase in remo'deling value is forseen, to $560,000,000.

NEu' NAETHODS

(Continued from Page 4) home improvement projects as room additions built on concrete slabs. Experienced do-it-yourselfers, Mr. Willins adds, should find the method easy.

"The moisture barrier arrang'ement," he explains, "is unusually effective. The polyethylene film between the two layers of sleepers is separated from the slab by a one-inch dead air space and from the hardwood floor by another inch of dead air space. These materially aid the polyethylene in preventing the rise of moisture from the slab into the flooring. The combination of air spaces and film reduces to virtually an absolute minimum the danger of excessive expansion and subsequent shrinkage of the flooring under the influence of heat. The hardwood retains an exceptionally high degree of dimensional stability.

Air Spaces

"The air spaces also serve importantly as added insulation, retarding entrance of cold air from the slab and escape of warm air from the floor. The total effect is warm, dry floors and ease of heating in winter."

One of the first apartment house builders to employ the system is E. R. Corley Associates, 3012 West Devon Ave., Chicago, .:vho recently madre a last rninute switch to the method in one room of a 3-story, lo-apartment structure nearing completion in the Rogers Park area.

"We would have used the system in several other rooms had we known about it sooner," says Emmett B. Corley, a partner. "It appears to have a great deal of merit."

The firm built 110 apartment units on Chicago's far north side and in adjoining Evanston during 1961, including 11 town houses. ft expects to put up about 210 units this year. Occasionally the firm sells a building upon completion but most buildings are retained as rental properties.

Tenants O.K. Oak

"We use strip oak floors in about 90 per cent of our apartments," Mr. Corley says. "\Me have found that they help attract tenants. People generally are very favorably impressed with an apartment when they see it has beautiful floors of oak. This is really quite a selling point in renting apartments. Families like the warmth and beauty of oak floors, and they appreciate the foot comfort such floors provide, as contrasted lvith hard, unyielding surfaces."

(fop Phoro) The strip ook flooring, which should be ot leost 25/32-lnch thick, then is insrolled ql righr ongles to tfie sleepers, with eoch piece of flooring beoring on dl leost one sleeper, lf the fooring is longued ond grooved ot sides and ends, cs is most hordwood flooring todoy, il is nol necessqry lo moke end ioints occur over sleepers. Adioining sltips, however, should nol hqve joinb cr the sqme spoce belween sleepers. Noiling is done in lhe customcry monner, with on opproved fostener driven ot eoch beoring point through the fongue edge of lhe fiooring ot on ongle of opproximotely 50 dcgrees. A 7d or 8d threoded or sc.ew type noil, oul ncil or borbed fostener is on occeptoble fostener.

In most of the firm's 1961 units, which were predominantly walk-up apartments, the strip oak floors were installed over conventional wood joist construction. \A/here concrete bases rvere involved, the firm employed the 2 x 4 staggered sleeper .ystetn "s t nailing surface for the oak or simply put down composition tile over the concrete.

"Because of the universal appeal of oak floors," NIr. Corley adds, "we prefer to install them in all rooms except the kitchen and bath. We plan to use the new nailing strip method extensively this year where concrete slab bases are involved, and we are looking forward to the considerable saving the system offers."