2019-08-08 - 02 foundations - compatibility mode...aug 08, 2019 · building science 2008...
TRANSCRIPT
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Foundations
August 8, 2019
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!"#$%$&'()&#*+"',-&(.-/"',-&
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Basement Insulation Location
§ 4.6 ACH50; 2129 CFM 50 total; 1100 CFM 50 through floor
§ 8.5 ACH50; 3590 CFM 50 total; 1740 CFM 50 through floor
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Insulation Location ChoicesA BC'=">(')D,($'C=("=,($)#;&'("$,(),">'C$,'<C,"$;E,&F&(;&G;C,"H'("$
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Basement Insulation Problems
A ."/0(-1(234,&5(-1("##$%6+4(7%-,#'*3$(13-%(."/0(-1(234,&5(-1("##$%6+4(7%-,#'*3$(13-%(/-&/3$'$(/-&/3$'$("&2(#-,+89(#-,+(,#("'(:;;<(=>
A .,?*,2(@"'$3('A3-*5A(@"++
A B,&'$3',%$(,&'$3,-3(%-,#'*3$(/-&2$&#"',-&(B,&'$3',%$(,&'$3,-3(%-,#'*3$(/-&2$&#"',-&(7+,0$("6-C$B,&'$3',%$(,&'$3,-3(%-,#'*3$(/-&2$&#"',-&(B,&'$3',%$(,&'$3,-3(%-,#'*3$(/-&2$&#"',-&(7+,0$("6-C$7+,0$("6-C$D7+,0$("6-C$7+,0$("6-C$53"2$(@"++#8
A E-&2$&#"',-&("'(6-''-%(-1(@"++E-&2$&#"',-&("'(6-''-%(-1(@"++7'A$3%"+(+"5(-1(#-,+8
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Recommended Wall Assembly • XPS is moisture tolerant • Wintertime condensation
controlled• Summertime (bottom of wall)
condensation controlled• Concrete can dry through XPS
at a safe rate
1” XPS
Drywall/latex paint
Stud wall w. batt
Air seal XPS
Sill gasket under bottom plate
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Interior Rubble Retrofit
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Alternate Details
• Insulated slab on top of existing slab
• No membrane up wall surface
• Wet vs. dry basement?
• Light gauge steel framing interior wall
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Building Science 2008Foundations and Basements No. 10/74
Spray foam basement insulation• Open cell• Closed cell
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Spray Foam “Bathtub”© 2011 by Byggmeister; reprinted with permission