Floor Assemblies (cont.) Costs for wood framed floor joists with subflooring and R-19 insulation. These costs include the floor joists, subflooring as described, blocking, nails and 6-1/4" thick R-1.9 fiberglass insulation between the floor joists. Figures include box or band joists and typical double joists. No beams included. Planked subflooring is based on 1.24 BF per square foot of floor. Costs shown are per square foot of area covered and include normal waste. Deduct for openings over 25 SF.
Floor joists 16" OC, R-19 insulation and OSB subflooring
  7/16" OSB subfloor
    2" x 6" joists B1@.040 SF 1.84 1.33 3.17
    2" x 8" joists B1@.041 SF 2.11 1.37 3.48
    2" x 10" joists B1@.043 SF 2.50 1.43 3.93
    2" x 12" joists B1@.044 SF 3.05 1.47 4.52
Floor joists 16" OC, R-19 insulation and OSB subflooring
  5/8" OSB subfloor
    2" x 6" joists B1@.040 SF 1.98 1.33 3.31
    2" x 8" joists B1@.041 SF 2.25 1.37 3.62
    2" x 10" joists B1@.043 SF 2.64 1.43 4.07
    2" x 12" joists B1@.044 SF 3.19 1.47 4.66
  3/4" OSB subfloor
    2" x 6" joists B1@.042 SF 2.05 1.40 3.45
    2" x 8" joists B1@.043 SF 2.32 1.43 3.75
    2" x 10" joists B1@.045 SF 2.71 1.50 4.21
    2" x 12" joists B1@.046 SF 3.26 1.53 4.79
Floor joists 16" OC, R-19 insulation and plywood subflooring
  5/8" plywood subfloor
    2" x 6" joists B1@.040 SF 2.03 1.33 3.36
    2" x 8" joists B1@.041 SF 2.30 1.37 3.67
    2" x 10" joists B1@.043 SF 2.69 1.43 4.12
    2" x 12" joists B1@.044 SF 3.24 1.47 4.71
  3/4" plywood subfloor
    2" x 6" joists B1@.042 SF 2.15 1.40 3.55
    2" x 8" joists B1@.043 SF 2.42 1.43 3.85
    2" x 10" joists B1@.045 SF 2.81 1.50 4.31
    2" x 12" joists B1@.046 SF 3.36 1.53 4.89
For different type insulation
Fiberglass batts
    10" thick R-30, add — SF .28 — .28
    12" thick R-38, add — SF .60 — .60
Wall Assemblies Costs for wood framed stud walls with wall finish treatment on both sides. These costs include wall studs at 16" center to center, double top plates, single bottom plates, fire blocking, nails and wall finish treatment as described. No headers or posts included. All lumber is Std & Btr. 2" x 4" walls have 1.12 BF per SF of wall and 2" x 6" walls have 1.68 BF per SF of wall. Costs shown are per SF or LF of wall measured on one face and include normal waste.
    Using 2 x 4 lumber at [view picture] — MBF 605.00 — 605.00
    Using 2 x 6 lumber at — MBF 617.00 — 617.00
    Using 1/2" gypsum wallboard at — SF .43 — .43
    Using 5/8" gypsum wallboard at — SF .40 — .40
Interior wall assemblies
  2" x 4" stud walls with 1/2" gypsum drywall both sides, ready for painting
    Cost per square foot of wall B1@.064 SF 1.36 2.13 3.49
    Cost per running foot, for 8' high walls B1@.512 LF 10.90 17.10 28.00
  2" x 4" stud walls with 1/2" gypsum drywall one side, ready for painting
    Cost per square foot of wall B1@.046 SF .94 1.53 2.47
    Cost per running foot, for 8' high walls B1@.368 LF 7.49 12.30 19.79
  2" x 4" stud walls with 5/8" gypsum fire rated drywall both sides, ready for painting
    Cost per square foot of wall B1@.068 SF 1.32 2.27 3.59
    Cost per running foot, for 8' high walls B1@.544 LF 10.60 18.10 28.70

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