Ed Minch
  • Chestertown, MD
  • United States
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Cold climate wall
2 Replies

I have heard Joe Lstriburek twice say that a wall in this climate (Albany NY, almost 6,000 DD) should have 1/3 of the R-value on the outside of the structure and 2/3 in the cavities to prevent…Continue

Started this discussion. Last reply by Don Hynek Jul 11.

Duct testing in a conditioned crawlspace
13 Replies

Concerning duct testing in crawlspaces (this is for new houses for Energy Star, but will be the same for existing houses):I have a house on a conditioned crawl with ducts in that crawl.  There is an…Continue

Tags: testing, duct, crawl, conditioned

Started this discussion. Last reply by Ed Minch Nov 25, 2011.

 

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Latest Activity

Ed Minch replied to Matthew P's discussion Expert Eye Needed in the group INFRARED THERMOGRAPHY USERS
"Chad As I said: "The blower door would have caused the cold air to come down the wall/ceiling joint into the wall - but this is not the case, and thermal bridging would have made all the studs show as much as the top plates." There is no…"
Nov 15
Ed Minch replied to Richard Beyer's discussion Media Reports Spray Polyurethane Foam Insulation spontaneously combusted a $5M Connecticut Home
"Richard  I have to re-learn how to read - that was in an earlier for in 2011.  Thanks Ed"
Nov 13
Ed Minch replied to Richard Beyer's discussion Media Reports Spray Polyurethane Foam Insulation spontaneously combusted a $5M Connecticut Home
"Interesting to read that there may never be a cause determined for this blaze.  For those of you that install foam - do you spray into a garbage bag as the equipment is firing up to check your mix?  If so, could it have been the thickness…"
Nov 13
Ed Minch replied to Kurt Shafer's discussion Where can I find the best radiant barrier to install under my roof?
"The important thing here is the surface temperature of the ceiling against the attic as compared to the interior temperature of the house as this is where the money goes.  The OP does not state what the air temp is when he has a 90° ceiling…"
Oct 30
Ed Minch replied to Bob Reuther's discussion ridge vent orientation
"Another observation: I was called to look at 13 houses in a development that had mold on the underside of the roof sheathing.   There were perhaps 150+ houses in this development but these 13 were neighbors, 6 on one side of the street and 7 on…"
Oct 11
Ed Minch replied to Bob Reuther's discussion ridge vent orientation
"A different rant, I agree.  The issue is:  "what is the ceiling temperature of my top floor on a hot sunny day?"  I have yet to see comparisons of different attic vents, insulation levels, and wind conditions that compare…"
Oct 11
Ed Minch replied to Bob Reuther's discussion ridge vent orientation
"Wait minute - I've been told that air sealing and insulating your attic protects your house from those hot attic temperatures.  You mean it's not true?  "
Oct 11
Ed Minch replied to Bob Reuther's discussion ridge vent orientation
"My friend and colleague Dick Tracy (who was an early adaptor in building science with a blower door and scanner in 1979) told me something interesting a few years back. I commented on several times seeing snow sitting on top of the attic insulation…"
Oct 9
Ed Minch's discussion was featured

Cold climate wall

I have heard Joe Lstriburek twice say that a wall in this climate (Albany NY, almost 6,000 DD) should have 1/3 of the R-value on the outside of the structure and 2/3 in the cavities to prevent condensation inside the wall. So 3 questions:1) Is there agreement that this generalization covers most bases?2) I have a couple of ideas in mind, but has anyone come up with a wall they have had success with?3) Would wet-spray cellulose in the cavity reduce the potential for condensation inside the…See More
Jul 14
Don Hynek replied to Ed Minch's discussion Cold climate wall
"My quick and dirty guess is that you have the proportions backward. For 30 years, cold-climate builders used a little bit of exterior insulation, to reduce thermal bridging. But if you went overboard, the wall couldn't dry to outdoors, and rot…"
Jul 11
Sean Lintow Sr replied to Ed Minch's discussion Cold climate wall
"A few quick thoughts: For #1 - that is the minimum, he would say the optimal is all insulation on the outside (see his perfect wall) --- oh I am sure many will disagree especially when you get to NAHB, but yes that is a good rule of thumb. #3 - as…"
Jul 10
Ed Minch posted a discussion

Cold climate wall

I have heard Joe Lstriburek twice say that a wall in this climate (Albany NY, almost 6,000 DD) should have 1/3 of the R-value on the outside of the structure and 2/3 in the cavities to prevent condensation inside the wall. So 3 questions:1) Is there agreement that this generalization covers most bases?2) I have a couple of ideas in mind, but has anyone come up with a wall they have had success with?3) Would wet-spray cellulose in the cavity reduce the potential for condensation inside the…See More
Jul 8
Ed Minch commented on Brett Little's blog post Despite record breaking cold winter our MI GreenStar Certified home saved 50% Energy!
"Brett Good work.  Do you have a before-and-after blower door number?  Was the foam in the attic on the attic floor or at the roof sheathing? Ed"
Jun 3
Ed Minch replied to Brandon Walton's discussion When is it too windy to use blower door?
"Colin at Retrotec has told me that you can't get any more accurate than a 120 second baseline and a 120 second time average blower door test, multi-point included. However, bear in mind that the ASTM standard states 20 MPH as the upper limit,…"
May 15
Ed Minch replied to George Kopf's discussion Heat loss from ducts
"Bob I ghink you are referring to two different issues.  One is the time per cycle to help keep efficiency high and that is what variable speed systems are all about  - keep the thing running so its efficiency stays near max. The…"
May 11
Ed Minch commented on Greg Labbe's blog post New Air Tightness Record in Ontario (Dare I say Canada?)
"What is the dollar savings per year between .6 and .3 ACH50. Great to have a contest, but is the extra effort worth it?"
May 8

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RESNET QAD, BPI BA, EP
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http://energysvc.com

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Comment Wall (1 comment)

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At 7:12am on December 24, 2010, Diane Chojnowski said…

Hi Ed,

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
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Thanks!
Diane, HEP Moderator

 
 
 

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