R Value of Wall ImprovementBRENO BONDARENKO COSTAARCH 3630PROF. APTEKAR & PROF AZAROFF

IECC & ASHRAE Maps

IECC & ASHRAE Maps

Average Temp & Precipitation Irvine, CA

Average Temp & Precipitation for NYC

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 – References R Value

Existing Conditions – References R Value

Existing Conditions – R Value of Wall

2x6” Wood Stud=6.875Closed Cell Foam R30=38.45/8” GWB with PCM=0.569¾” Plywood=0.95Window by Pella=2.75¼” 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 – Stevens2x6” Wood Stud=6.875Closed Cell Foam R30=38.45/8” GWB with PCM=0.569¾” Plywood=0.95Window by Pella=2.75¼” Cement Siding=0.132” Air Space @ Insulation=1.13

Total=50.804

• 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.

Existing Conditions- SCIAL/CalTechIdentifying Materials

Structural Steel Framing4x6 (wood) Beam2x12 (wood) beam(6”)Batt Insulation(5/8”) Plywood SheathingSprayed Insulation

Existing Conditions – Reference R Value

Existing Conditions – R Value of WallStructural Steel Framing=0.5414x6 (wood) Beam=5.42x12 (wood) beam=16.875(12”x12”)(6”)Batt Insulation=19.0(5/8”) Plywood Sheathing=0.94Sprayed 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 WallStructural Steel Framing=0.5414x6 (wood) Beam=5.42x12 (wood) beam=16.875(12”x12”)(6”)Batt Insulation=19.0(5/8”) Plywood Sheathing=0.94Sprayed 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 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