John Kuiper
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  • Grand Rapids, MI
  • United States
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R-values for Code Performance Path - Fiberglass
4 Replies

A Builder in Michigan was using Rescheck to demonstrate 2009 IECC energy code compliance as part of the permit application process.  I was consulted, because the home could not pass code through…Continue

Started this discussion. Last reply by Robert DV Jul 11, 2013.

 

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HERS rating & heat losing features

Some of the luxury  homes I am rating have features that can use additional energy, but may or may not be outside of the thermal envelope.I would like to have a document to give the designer that clearly states how I would account for these in a rating.  I also want to give an accurate and honest rating and discourage energy-hogging features.In some cases, there is a question of whether or not an area is part of the thermal envelope.  For the sake of discussion, let me give some examples of…See More
Sep 23, 2013
Stan Kuhn replied to John Kuiper's discussion HERS rating & heat losing features in the group Home Energy Ratings
"I don't have any good advice, but my opinion is that the owners of homes with obvious energy waste "just because I want it" need to include the usage in the rating, and compensate otherwise if they want a reasonable rating. …"
Sep 14, 2013
John Nicholas replied to John Kuiper's discussion HERS rating & heat losing features in the group Home Energy Ratings
"You have 5 items. # 4 is obviously outside the Thermal Enclosure # 5 should have its own source of heat and would be a non-rated item; if it shares a heat source then it is up to your provider The rest need a decision by your provider. Perhaps…"
Sep 13, 2013
John Kuiper replied to Bud Poll's discussion Does infiltration really reduce the r-value of our insulation?
"That's true Bud. We can't trust the software completely and try to make our guesses good."
Sep 13, 2013
John Kuiper added a discussion to the group Home Energy Ratings
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HERS rating & heat losing features

Some of the luxury  homes I am rating have features that can use additional energy, but may or may not be outside of the thermal envelope.I would like to have a document to give the designer that clearly states how I would account for these in a rating.  I also want to give an accurate and honest rating and discourage energy-hogging features.In some cases, there is a question of whether or not an area is part of the thermal envelope.  For the sake of discussion, let me give some examples of…See More
Sep 13, 2013
John Kuiper joined Evan Mills's group
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Home Energy Ratings

Calculating them; visualizing them; explaining them; selling them .... there is a lot to discuss and debate hereSee More
Sep 13, 2013
John Kuiper replied to Bud Poll's discussion Does infiltration really reduce the r-value of our insulation?
"Let's consider a knee wall in an attic with open faced fiberglass.  With no air barrier on the outside surface, the insulation is not performing like it would if there were barriers on all sides. By sealing the back of that wall, there…"
Sep 13, 2013
Robert DV replied to John Kuiper's discussion R-values for Code Performance Path - Fiberglass
"You can use either DOE-2, Energy Gauge, REM Design or REM Rate."
Jul 11, 2013
John Kuiper replied to John Kuiper's discussion R-values for Code Performance Path - Fiberglass
"Thanks Todd and Bob, I've tracked down the misunderstanding on the assigned R-values.  The next challenge is to find appropriate modeling software to see if the house passes code by its performance when air infiltration and insulation…"
Jul 11, 2013
Todd Calhoun replied to John Kuiper's discussion R-values for Code Performance Path - Fiberglass
"Insulation R-Values Checklist Requirement ID: IN13 Code Section(s): 303.1 Insulation R-values. All insulation installed in the building thermal envelope should have a label on the insulation indicating the R-value of the insulation or the…"
Jul 11, 2013
Robert DV replied to John Kuiper's discussion R-values for Code Performance Path - Fiberglass
"John The 2009 Michigan Uniform Energy Code follows closely with the 2009 IECC.  Section 402.1.4 Total UA alternative addresses the method that RES Check follows.  The values used for assemblies can be derived from the ASHRAE Handbook. In…"
Jul 11, 2013
John Kuiper posted a discussion

R-values for Code Performance Path - Fiberglass

A Builder in Michigan was using Rescheck to demonstrate 2009 IECC energy code compliance as part of the permit application process.  I was consulted, because the home could not pass code through ResCheck with open-cell foam in wall cavities and foundation walls, high efficiency furnace, attic with flash coat of foam, covered with R-50 blown cellulose.I was told by the person completing the ResCheck model, that we must now use the r-value rating of fiberglass for the cavity insulation, no matter…See More
Jul 10, 2013
John Kuiper replied to Brad Cook's discussion Slow cure foam injected behind fiberglass in walls?
"Bob, Thanks for the correction on R-value and we certainly agree on where to attack air sealing first.  At colder temps, Tripolymer's R value goes up.  Am I right that the R value for fiberglass goes down at lower temps?   The…"
Aug 23, 2011
John Kuiper replied to Brad Cook's discussion Slow cure foam injected behind fiberglass in walls?
"The Tripolymer wall foam insulation that I have used would be a good fit for this application.   It is a phenolic-resin base that goes in like shaving cream.  There are no issues with toxicity.  It does expand upon installation -…"
Aug 23, 2011
John Kuiper updated their profile
Feb 23, 2011
John Kuiper is now a member of Home Energy Pros
Nov 4, 2010

Profile Information

Company
The Home Energy Assessor
Professional Certification
BPI Building Analyst, HERS Rater, LEED AP
Professional Interests
Home Energy Auditing
New Home Ratings

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