TJ Alexander
  • Sunapee, NH
  • United States
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So many homes have poorly installed fiberglass insulation. Have you been successful with a retrofit dense pack cellulose?
5 Replies

Doing testing of existing homes it is typical to see mottled patterns of surface temperatures with the FLIR Infrared Thermal Imager during Blower Door Testing.  Part of the problem is air sealing and…Continue

Started this discussion. Last reply by James P. Weingardt Jul 5, 2014.

 

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James P. Weingardt replied to TJ Alexander's discussion So many homes have poorly installed fiberglass insulation. Have you been successful with a retrofit dense pack cellulose?
"We are dense packing walls with insulation present and receiving good results in the Denver CO area.  Overall home air leakage reduction of 300 cfm per job.   Bestway Insualtion has been dense packing existing fiberglass walls for…"
Jul 5, 2014
Dan Auer replied to TJ Alexander's discussion So many homes have poorly installed fiberglass insulation. Have you been successful with a retrofit dense pack cellulose?
"I am doing lots of dense pack cellulose over batted walls. Huge reduction in air leakage, no off gassing. Tracked billing history for two years, very cost effective. SIR greater than 1. O yea."
Jul 3, 2014
Bpb Farmer replied to TJ Alexander's discussion So many homes have poorly installed fiberglass insulation. Have you been successful with a retrofit dense pack cellulose?
"Do your self and your wallet a favor and get injection foam. The traditional insulation's are not worth the dust, allergy's, rodents, bugs and loss of "R" value with time. Do your research and you will not buy anything else.…"
Jul 3, 2014
Dan Wildenhaus replied to TJ Alexander's discussion So many homes have poorly installed fiberglass insulation. Have you been successful with a retrofit dense pack cellulose?
"Hey TJ, using the tube fill method with cellulose, contractors in the Puget Sound area (that would be around Seattle WA) have been dense packing right over the R-11 fiberglass batts with good success.  Keep in mind, this probably does not have…"
Jun 26, 2014
TJ Alexander's discussion was featured

So many homes have poorly installed fiberglass insulation. Have you been successful with a retrofit dense pack cellulose?

Doing testing of existing homes it is typical to see mottled patterns of surface temperatures with the FLIR Infrared Thermal Imager during Blower Door Testing.  Part of the problem is air sealing and the other part of the problem is poorly installed fiberglass insulation.This is not a rant against fiberglass insulation (I am a fan of both Rock Wool/Roxul and dense packed cellulose) for retrofit projects.  Fiberglass batt or blown insulation can perform fine, if it is installed properly and the…See More
Jun 19, 2014
Bud Poll replied to TJ Alexander's discussion So many homes have poorly installed fiberglass insulation. Have you been successful with a retrofit dense pack cellulose?
"Hi TJ, I've never recommended it due to the cost benefit of adding the dense pack.  Even a poorly installed assembly will benefit from whatever insulation is there limiting the improvement that can be credited to drilling, dense packing,…"
Jun 19, 2014
TJ Alexander posted a discussion

So many homes have poorly installed fiberglass insulation. Have you been successful with a retrofit dense pack cellulose?

Doing testing of existing homes it is typical to see mottled patterns of surface temperatures with the FLIR Infrared Thermal Imager during Blower Door Testing.  Part of the problem is air sealing and the other part of the problem is poorly installed fiberglass insulation.This is not a rant against fiberglass insulation (I am a fan of both Rock Wool/Roxul and dense packed cellulose) for retrofit projects.  Fiberglass batt or blown insulation can perform fine, if it is installed properly and the…See More
Jun 19, 2014
TJ Alexander posted a blog post

So many homes have fiberglass insulation that is poorly installed in New Hampshire and elsewhere

Doing testing of existing homes it is typical to see mottled patterns of surface temperatures with the FLIR Infrared Thermal Imager during Blower Door Testing.  Part of the problem is air sealing and the other part of the problem is poorly installed fiberglass insulation.This is not a rant against fiberglass insulation (I am a fan of both Rock Wool/Roxul and dense packed cellulose) for retrofit projects.  Fiberglass batt or blown insulation can perform fine, if it is installed properly and the…See More
Jun 12, 2014

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Mar 23, 2012
TJ Alexander is now a member of Home Energy Pros
Feb 15, 2012

Profile Information

Company
Thermo Building Services LLC
Professional Certification
BPI Building Analyst
Professional Interests
Energy Auditing and problem solving in existing buildings as well as energy efficiency.

I am also involved in energy saving retrofits as well as heating and HVAC system upgrades and alternative energy sources. Keeping up with regular training on the best use of materials and design of mechanical systems to get the best efficiency to cost ratio for the client.
Website URL
http://thermobuildingservices.com

Passive House interest

We have several passive house inspired projects in the planning stage in New Hampshire.

 As usual with some folks in the business, I am going to build my own net zero home. That way I don't have to sell or compromise on the important points and construction methods with folks who think they have the answer or don't think the details are important.

In doing quality control work in new construction with the established conventional builders, the passive house influences and advice seem to be ignored and disparaged.

There are buildings being constructed that offer the promise of a healthy house with low energy use and reasonably priced, durable construction.

TJ Alexander's Blog

So many homes have fiberglass insulation that is poorly installed in New Hampshire and elsewhere

Doing testing of existing homes it is typical to see mottled patterns of surface temperatures with the FLIR Infrared Thermal Imager during Blower Door Testing.  

Part of the problem is air sealing and the other part of the problem is poorly installed fiberglass insulation.

This is not a rant against fiberglass insulation (I am a fan of both Rock Wool/Roxul and dense packed cellulose) for retrofit projects.  Fiberglass batt or blown insulation can perform fine, if it is…

Continue

Posted on June 12, 2014 at 1:31pm

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At 8:04pm on February 15, 2012, Diane Chojnowski said…

Hi TJ,

Welcome to Home Energy Pros! 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. And add your location on our Member Map!


Thanks!
Diane, HEP Moderator

 
 
 

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