David Willson's Groups (6)

  • Building Performance Institute (BPI)

    332 members Latest Activity: on Thursday

    BPI is the nation's premier standards development, quality assurance and credentialing organization for residential energy efficiency retrofit…

  • Energy Upgrade California

    56 members Latest Activity: Sep 8, 2015

    This is a group for contractors and other pros participating in the Energy Upgrade California energy efficiency program launched 3/1/11.

  • Home Energy Pros on Twitter

    65 members Latest Activity: Jan 16

    We've created a twitter list of members of Home Energy Pros who tweet about home performance and energy efficiency!

  • Best Practices (Residential)

    343 members Latest Activity: on Friday

    Best Building, Retrofitting, or even Auditing Practices - what are they, what should change, what needs to find it's way to the dust bin of…

  • Marketing Energy Efficiency

    253 members Latest Activity: Jul 21

    Sharing ideas, tools and examples of promoting energy efficiency to consumers

  • Building Simulations

    73 members Latest Activity: Dec 31, 2016 Work collaboratively to find easier, more accurate and better ways to model, predict and verify a home's energy consumption.

Forum Discussions

How would you insulate this roof?

Started by David Butler in General Forum. Last reply by Brad Cook 22 minutes ago. 33 Replies

Psychrometric Chart Training

Started by John Krochmalny in Training. Last reply by Mahendra Shah on Friday. 1 Reply

Dirty solar panels

Started by Evan Mills in General Forum. Last reply by Stacie Bagnasco Oct 16. 1 Reply

Latest Activity

Brad Cook replied to David Butler's discussion How would you insulate this roof?
"I missed where the suggestion for rails came in. The plywood would not need any rails. 4+ inches is…"
22 minutes ago
David Butler replied to David Butler's discussion How would you insulate this roof?
"I'm a little confused about the necessity and purpose of using support rails if working on…"
39 minutes ago
David Butler replied to David Butler's discussion How would you insulate this roof?
"If you insulate master bedroom and family room from below, you definitely need more R-value than…"
57 minutes ago
David Butler replied to David Butler's discussion How would you insulate this roof?
"Brad, I was only talking about using EPS between the ridges, if necessary, to conform to bolts.…"
1 hour ago
Brad Cook replied to David Butler's discussion How would you insulate this roof?
"It kind of depends on the PIC. Not all insulation is made the same. Here in VT (and all of New…"
1 hour ago
David Butler replied to David Butler's discussion How would you insulate this roof?
"Filling those shallow valleys with rigid foam not only prevents primary foam panels from…"
1 hour ago
Brad Cook replied to David Butler's discussion How would you insulate this roof?
"Bill, you just posted a number of responses in different areas of the thread. I will try to respond…"
5 hours ago
Donald Hester liked Marc Tannenbaum's blog post 3 Issues HVAC contractors Should Know About Impacting Customer Comfort and Health
5 hours ago

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