r value of wall improvement
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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 - PowerPoint PPT PresentationTRANSCRIPT
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