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R Value of Wall Improvement. Breno bondarenko Costa Arch 3630 Prof. Aptekar & Prof Azaroff. IECC & ASHRAE Maps. IECC & ASHRAE Maps. Average Temp & Precipitation Irvine, CA. Average Temp & Precipitation for NYC. Existing Conditions- Stevens. Identifying Material

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r value of wall improvement

R Value of Wall Improvement

Breno bondarenko Costa

Arch 3630

Prof. Aptekar & Prof Azaroff

existing conditions stevens
Existing Conditions- Stevens
  • Identifying Material
  • 1/4” Cement Board Siding
  • 1 3/16” Substructure
  • Thermal Barrier
  • ¾” Plywood
  • Close Cell Spray Foam R30
  • 2x6” Stud Wall
  • Awning Window by Pella
  • 5/8” GWB
  • Phase Change Material(PCM)
existing conditions r value of wall
Existing Conditions – R Value of Wall

2x6” Wood Stud=6.875

Closed Cell Foam R30=38.4

5/8” GWB with PCM=0.569

¾” Plywood=0.95

Window by Pella=2.75

¼” Cement Siding=0.13

Total=49.674

  • The addition of all the R values of the wall materials does not surpass the 50 minimum for an excellent insulation.
proposed changes stevens
Proposed Changes – Stevens
  • By simply adding a 2” air space at insulation on the outside part of the wall, the R value of the wall increases and surpasses the 50 minimum required.

2x6” Wood Stud=6.875

Closed Cell Foam R30=38.4

5/8” GWB with PCM=0.569

¾” Plywood=0.95

Window by Pella=2.75

¼” Cement Siding=0.13

2” Air Space @ Insulation=1.13

Total=50.804

existing conditions scial caltech
Existing Conditions- SCIAL/CalTech

Identifying Materials

Structural Steel Framing

4x6 (wood) Beam

2x12 (wood) beam

(6”)Batt Insulation

(5/8”) Plywood Sheathing

Sprayed Insulation

existing conditions r value of wall1
Existing Conditions – R Value of Wall

Structural Steel Framing=0.541

4x6 (wood) Beam=5.4

2x12 (wood) beam=16.875(12”x12”)

(6”)BattInsulation=19.0

(5/8”) Plywood Sheathing=0.94

Sprayed Insulation @ 3”=2.4(@2.4 per12”h)

Sprayed Insulation @ 6”=4.8(@2.4 per 12”h)

Total=49.956

  • The total addition of the R values of the wall is a little bellow the recommended. Although, there is a thermal bridge connecting the roof to the wall making this number go down quite a bit and diminishing the ability for the wall to insulate the building.
proposed changes r value of wall
Proposed Changes – R Value of Wall

Structural Steel Framing=0.541

4x6 (wood) Beam=5.4

2x12 (wood) beam=16.875(12”x12”)

(6”)BattInsulation=19.0

(5/8”) Plywood Sheathing=0.94

Sprayed Insulation @ 6”=4.8(@2.4 per12”h)

Sprayed Insulation @ 6”=4.8(@2.4 per 12”h)

Total=52.356

  • By adding sprayed insulation around the steel structural framing, it eliminates the thermal bridge, increasing the R value, therefore, insulating the building better.
references
References
  • http://www.weather.com/weather/wxclimatology/monthly/graph/USNY0996
  • http://www.weather.com/weather/wxclimatology/monthly/92697
  • Building System: Mechanical, Electrical, Plumbing, Fire Safety & Communication Systems, Lighting & Acoustics Educational book by Wendell C. Edwards
  • http://archtoolbox.com/materials-systems/thermal-moisture-protection/24-rvalues.html
  • http://rvalue.net/page2.html
  • http://apps1.eere.energy.gov/buildings/publications/pdfs/building_america/4_3a_ba_innov_buildingscienceclimatemaps_011713.pdf
  • http://www.jameshardie.com/pdf/esr-1844.pdf
  • http://www.springfieldmo.gov/taskforce/greenbuild/pdfs/rValRequireASHRAE90.1.pdf
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