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5 Answers

ERV airflow imbalances

Hey GBA,

Longtime-no-ask-question-to. I hope you are all well.

In Energy efficiency and durability | Asked By Art Vandelay, AIA/LEED AP+, Zone 5 | Apr 4 12
2 Answers

How to properly air seal and insulate a cathedral ceiling composed of structural T&G cedar

This is an existing roof structure currently experiencing moisture problems most likely due to air leakage. This roof is in Winnipeg, Manitoba Canada, a very cold climate. Right now it has approximately 4" of EPS foam and tarpaper. One of the primary reason to address this roof is that there has been significant carpenter ant activity over the last few years. Would air sealing with caulking on the inside be enough of an air seal? (the cedar is the interior finished ceiling as well).

In Energy efficiency and durability | Asked By Jon Fast | Apr 4 12
1 Answer

Foam insulation panels on stud walls inside or outside?

Most details show foam insulation panels added over plywood sheathing on the outside. This generates all kinds of detail problems with windows, flashing, and siding attachment. Yes they can be done. But can these new details be done right by a contractor who has never done it before,.
Why not use polyiso panels on the interior? Joints can be taped and sealed for air tightnes. Furring screwed thru as on some exterior details holds the drywall. I plan to use 3" or more.

In GBA Pro help | Asked By Roger Blaho | Apr 4 12
2 Answers

Attaching corner trim over rigid foam

I plan on re-siding, with 4" polyiso panels underneath. Question - I want to use corner trim on outside corners. I also really want the polyiso to overlap the corners - how do I attach the corner trim?
Not sure how to attach the corner trim if the polyiso overlaps the corners.

In Green building techniques | Asked By Timothy Holzmann | Apr 4 12
33 Answers

I am building a brick home in Houston.

Is this wall construction plan sound? I have a 5 1/2" brick ledge with the following plan: Brick -> Air Space -> Tyvek -> Osb -> 2" by 4" frame -> Blown Cellulose -> Dry Wall -> Paint. I am concerned about solar [vapor drive].

Home Details:
Location Houston
Ventillated Crawl Space
Ventillated Attic
Large 2nd floor space over driveway
Living area over detached garage
Brick Veneer
Asphalt Shingles
Cellulose Insulation

In GBA Pro help | Asked By Robert Cozart | Jan 18 10
1 Answer

Does anyone have a recommendation on the most reliable, well built, direct-vent energy-efficient propane fireplace?

Would appreciate any brand suggestions.

In Energy efficiency and durability | Asked By Mona Lydon-Rochelle | Apr 2 12
7 Answers

Installing windows in an out-of-plumb wall

I'm trying to decide how to install windows -- nail flange or block frame -- in a wall that is out of plumb. The windows should be installed to be true in the vertical plane so that they work well, of course, but doing that means that the bottom of some windows would be as much as 1" out of plane from the top. The walls slope outward so it's the bottom that would need to be shimmed or padded.

Has anyone dealt with this problem successfully? The way the house has been remodeled means that correcting the slope of the walls is not an option.

Thanks.

Jonathan

In Green building techniques | Asked By Jonathan Bean | Apr 1 12
3 Answers

Solar Bottle Lights in The Philippines

Cool re-use for plastic bottles. Also makes me appreciate even more how well off we are....

http://youtu.be/SBWi3NtND68

In Green products and materials | Asked By Bill Costain | Apr 1 12
53 Answers

Bathroom Heaters - Are They Simply an Indulgence?

I've recently mentioned in a couple threads that I'll finally be breaking ground this coming fall for a new home in Maine, which will be relatively small (1,214 sq ft over a basement,) very well insulated and as airtight as possible. I'm not taking it as far as a Passivhaus for a number of reasons, but that's another thread.

In Mechanicals | Asked By Litawyn Eco-Cottage | Feb 4 12
6 Answers

Sustainable Community

The Uros people, who live on Lake Titicaca (Peru), have always lived as a sustainable community, dating back to the Inca civilization. They not only make their homes out of Totora reeds on floating islands, but also use the reeds for food, fuel and material to build their boats.
What I find interesting is that they now use solar panels to power their TVs and cellular phones. Does that mean they have the best of both worlds?

In General questions | Asked By Armando Cobo | Apr 1 12
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