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6 Answers

Are "Energy Nerds" in agreement on this?

"PV's are cheap enough now to remove the need to super insulated houses"

Asked By tech1234 | Apr 19 18
23 Answers

Insulating kneewall slopes from above

Unfortunately we are having to fix some poor quality work by insulation contractors.

How should we build baffles, or what kind of baffles/vents should we buy, to maintain >1” vent for 5’ sloped ceilings above a kneewall, which can only be accessed from the top attic?

Asked By Emerson | Apr 17 18
1 Answer

2 or 3 Coat Traditional Stucco Application with Drain Cavity

Mineral wool outside insulation is becoming more common in residential in my location. I favour this over rigid insulation by far for many reasons, but I'm trying to figure out a best approach for traditional stucco applications.

Asked By DarrenKC | Apr 19 18
6 Answers

Energy end-use monitoring system for both electricity and natural gas energy sources

I am looking for an energy end-use monitoring system that we can use in buildings that use both electrical and natural gas energy. There are a lot of really good electrical energy end-use monitoring systems, but very few that include the ability to connect to natural gas meters. The qualities I am looking for include:

- Reasonable capital cost that allow the system to be used by cash-conscience organizations (e.g. affordable housing) who are eager to reduce their energy costs

Asked By Greg Leskien | Apr 16 18
7 Answers

Mold Remediation

Anyone have mold remediation on a commercial building experience or been/are in the mold remediation industry?

I have a maintenance contract on this building that just started, could smell a strong mildew odor in a unit on the top floor north side of the building when completing a PO. Was doing top floor work in the south side of the building no odor. Slight odor in hall at the midpoint of the building top floor. It was unseasonably warm that day, mid 40's high temp.

Asked By T Carlson | Mar 5 18
17 Answers

Wall insulation for a new room addition

I'm thinking about this (not so) future project. One option is 2x6 studding with R-19 (6") fiberglass batts in between studs. To gain more R value and reduce thermal bridging I was thinking of adding probably 2" of type II EPS (4.2 R per inch they say)to the inside of the studs, for about R-27 for the wall. I'm assuming this needs to dry to interior since plywood and/or OSB are pretty impermeable to moisture and would limit drying to the outside. Is that correct, and if so is 2" of EPS adequately permeable for interior drying? I would have sheetrock over EPS.

Asked By Howard Gentler | Apr 16 18
6 Answers

Sealing junction between ceiling drywall sheets

I am about to air seal my attic. I will use caulk and polyurethane spray cans to seal air leaks around pipes, electric boxes, chimney, top of walls, ... I was wondering if the junction between the ceiling drywall sheets should also be sealed. Using caulk or polyurethane seem a little overkill (quite a lot of junction to cover $$$) to me and I was wondering if using waterproof paint in those junctions would be a good idea. In the end, I would like to seal all the air except the slow movement of air coming through the drywall itself.
Thank you

Asked By LongfieldL | Apr 13 18
17 Answers

Interior walls set on top of rigid foam

I'm building a living space (750sq ft) into a building in zone 6a. The slab has a 6 mil vapor barrier and 2" foam under slab and 2" foam on slab edge. The space is completely empty now. (no interior walls). I cannot tolerate concrete floor to walk around on because of hardness and cold feeling. I would like to lay down another vapor barrier then 2" foam then 2 layers of 1/2 " plywood glued and then finished floor materials. The building sits very high and has crushed rock under slab with 2 ft overhangs and proper landscape grading. I doubt there will be any moisture issues.

Asked By Smokey059 | Apr 11 18
5 Answers

Garage Insulation - walls and roof?


I have enjoyed learning from all of the great content on this website - it has guided me through several projects and raised my interest in building science and improving the energy efficiency of my home.

My current question has two parts - 1) should I insulate my attached garage, and 2) if yes, how can I do this correctly and in a cost effective manner?

Asked By Eric Miller | Apr 10 18
6 Answers

Basement insulation strategies

Now that I've got my above grade strategy worked out I'm starting to look at my basement and foundation strategy. Climate Zone 6.

I've listened to the excellent podcast featuring Martin here:

And read these two links as well as other articles on basement insulation:

Asked By Steve Mackay | Apr 17 18
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