2578 



Chapter 22 



TONGUE 



GROOVE 



SPLINE 



M 134759 

 Figure 22-8. — Parquet flooring. A, tongued and grooved; B, square-edged and splined. 



cold setting binders. (See U.S. Forest Service, Forest Products Laboratory 

 1961 , p. 24, for a discussion of mastics.) Finish flooring applied directly over a 

 concrete slab lacks both heat and impact-sound insulation. 



Either parquet or strip flooring may be applied over particleboard (Vx-inch) or 

 fiberboard (0.215 inch) underlayment which is nailed or glue-nailed to -Vs-inch 

 plywood sheets glue-nailed to floor joists. If the plywood glue-nailed to the 

 joists is sanded, has tongue-and-groove edges and ends, and is y4-inch thick, the 

 strip flooring can be applied directly to the plywood subfloor. 



When parquet flooring is mastic-bonded to a fiberboard underlayment, sol- 

 vent-based mastics are preferable, as water-based mastics tend to swell the 

 underlayment. 



Miller (1972) polled 16 parquet flooring manufacturers to determine product 

 distribution patterns existing in the industry in 1969. Geographic regions identi- 

 fied are those shown in figure 22-6 (bottom). Data were obtained on shipments 

 of about 22.21 million square feet of flooring, or 82 percent of total 1969 

 shipments estimated at 27.20 million square feet. An additional 1.44 million 

 square feet were imported into the United States in 1969. 



