Haley Keegan
  • Chicago, IL
  • United States
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Haley Keegan's Discussions

Derating / Rating Old Insulation

Started this discussion. Last reply by Shawn Siems Jan 2. 20 Replies

Does anyone have a calculation or guide you follow to de-rate the r-value of existing insulation?I'm familiar with RESNET grading, but that seems to be for new installs and I can't find what the…Continue

Tags: correction, factor, derating, derate, insulation

Baffles without soffit vents?

Started this discussion. Last reply by Eric Kjelshus Sep 9, 2019. 14 Replies

Hi all - I recently saw a contractor installing baffles in an attic that didn't have soffit vents - they had gable vents. Do others see this? And are there real benefits to this, maybe by keeping the…Continue

Tags: vents, roof, baffles

 

Haley Keegan's Page

Latest Activity

Shawn Siems replied to Haley Keegan's discussion Derating / Rating Old Insulation
"I don't have a copy of the original BPI charts, but I believe our local utility has adopted the original charts and included some examples of insulation in various states. You can tell which portion of the attached was produced by the utility…"
Jan 2
Eric Kjelshus replied to Haley Keegan's discussion Derating / Rating Old Insulation
"Open batt or open fiber will wind wash in vary cold weather so the batt says R-30 and with IR its says R-10 test same spot with out wind and is R-30.    How do you deal with wind washing?  "
Dec 30, 2019
Roger Snow replied to Haley Keegan's discussion Derating / Rating Old Insulation
"Check the California Installation Standards with a well thought out and researched listing of old insulation. "
Dec 30, 2019
Scott Mills replied to Haley Keegan's discussion Derating / Rating Old Insulation
"Attached HES insulation derating file. "
Dec 30, 2019
Rhett Major replied to Haley Keegan's discussion Derating / Rating Old Insulation
"You are welcome. Not sure what that did not make it into the new standards, but I still use it myself, as do many others I know."
Dec 30, 2019
Scott Mills replied to Haley Keegan's discussion Derating / Rating Old Insulation
"I've attached the insulation derating page for illustration. You can find an assessor or train to use their software. It is a simple certification.homeenergyscore.gov homeenergyscore.gov"
Dec 30, 2019
Haley Keegan replied to Haley Keegan's discussion Derating / Rating Old Insulation
"Thanks Brett!"
Dec 30, 2019
Brett Little replied to Haley Keegan's discussion Derating / Rating Old Insulation
Dec 30, 2019
Haley Keegan replied to Haley Keegan's discussion Derating / Rating Old Insulation
"Sounds fun! Won't work for all my contractors because they may not have the equipment, but I'll have to try that sometime."
Dec 30, 2019
Haley Keegan replied to Haley Keegan's discussion Derating / Rating Old Insulation
"Thanks! Just sent an email. "
Dec 30, 2019
Haley Keegan replied to Haley Keegan's discussion Derating / Rating Old Insulation
"Sorry, wasn't asking about area-weighting, just about de-rating the insulation itself. Thank you though!"
Dec 30, 2019
Haley Keegan replied to Haley Keegan's discussion Derating / Rating Old Insulation
"Ah, the table on batt insulation was what I was thinking of but couldn't find. Thanks!"
Dec 30, 2019
Rhett Major replied to Haley Keegan's discussion Derating / Rating Old Insulation
"Page 7 & 8 of the old Technical standards have that info. (attached)"
Dec 30, 2019
Cheryl Shattenberg replied to Haley Keegan's discussion Derating / Rating Old Insulation
"Hi Haley,  the formula for calculating Area-Weighted average R-Value is in the back of the 5th edition Krigger, Residential Energy book page 263.  And if I remember correctly it was also used in the RESNET training. Here is the formula if…"
Dec 30, 2019
Ken Farrish replied to Haley Keegan's discussion Derating / Rating Old Insulation
"Haley, up here in Vancouver BC we have created Assessed R-Value Guidelines that we have been using in a utility low-income residential program for the last 8+ years. It was developed using the older RESNET & DOE procedures, along with some…"
Dec 30, 2019
Eric Kjelshus replied to Haley Keegan's discussion Derating / Rating Old Insulation
"Use your IR camera and make your own "R"  If you have a high end IR camera and 40' plus temp - you can get close.   If you know if that one part is  R-15 and next part is 1/2 or R-7.5  its just a % of…"
Dec 24, 2019

Profile Information

Company
Resource Innovations
Role in Home Performance Marketplace
Energy efficiency / Weatherization program administrator or implementer / evaluator
Professional Certification
BPI
Website URL
http://resource-innovations.com
LinkedIn Profile
https://www.linkedin.com/in/haleykeegan/

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At 11:15am on April 19, 2018, Diane Chojnowski said…

Hi Haley,

Welcome to Home Energy Pros Forum. Feel free to join the conversation in the Forum and Groups. And share your energy efficiency photos, videos, and upcoming events. If you're blogging about home performance, this is the place for you!

Don't forget to upload your profile photo.

Thanks!

Diane, HEP Forum Moderator

 
 
 

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