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9 Answers

I am close to the borders of climate zone 2A and 3A in Texas. I'm more in 2A territory than 3A, though. The weather is hot and very humid during the summer (with the exception of our drought this summer!), and cold and soggy in the winter.

I am building an energy-efficient movable cabin as an experimental project. Because of the high cooling loads during the summer, I want to make as efficient a building envelope as possible. I have been all over the place with different designs for the walls and roof of the structure.

In Energy efficiency and durability | Asked By Jonathan Moore | Dec 22 11
5 Answers

The homebuyer is trying to urge a tract builder (in North-Central Florida -hot-humid) to do more than their minimum standard practice. The as-designed block wall would be stucco-block-airgap 3/4" furring and "radiant insulation" (foil) over the furring then drywall. The homebuyer is interested in adding rigid foam or spray foam and has concerns about condensation and mildew.

In Energy efficiency and durability | Asked By Kevin Veach | Dec 17 11
58 Answers

[For most recent questions that haven't been answered, please skip ahead.]

Hello, all. This is my first post here. Not a builder, not an architect, not a scientist--just somebody who has been involved in six years so far of renovations and is gearing up for more punishment, and hoping to do this round well.

In Green building techniques | Asked By Minneapolis Disaster, 6B | Jan 30 11
3 Answers

I replaced an incandescent light fixture with a CFL fixture that uses a GU24 lamp. This is a hallway fixture so it's controlled by two separate switches (3-way) that are backlit when off.

Everything works as expected, but I noticed that CFL lamp flickers slightly after the fixture has been turned off.

Is this typical or have I wired something wrong? Any advice is greatly appreciated!

In Energy efficiency and durability | Asked By Trung Phung | Dec 24 11
2 Answers

Came across something interesting. A new insulated door had been installed. Its a mobile home door, so its frame is aluminum. The condensation was dripping from the inside of the frame. Is there a detail for this type of door, to prevent thermal bridging, or condensation?

In General questions | Asked By shane claflin | Dec 23 11
8 Answers

Hi GBA community!

I am having a difficult time comming up with the ideal wall construction(detail) using 2x6 timber for a build I am doing this spring. There are 5500 HDD here in Northern Ontario - Canada.

This is what I have so far...working from inward to out
-1/2" Drywall
- 6mm poly
- BIBS (fiberglass) in the 2x6 cavity
- 2" XPS (non taped)
- 7/16" osb
- house wrap (wrb)
- Siding and Stone

Couple of questions:

1. will the osb cause me any issues?
I have it there to affix my siding and for structural support (or can it even do that over 2" foam affixed to studs)

In GBA Pro help | Asked By Brian Krmpotic | Dec 19 11
4 Answers


In Green products and materials | Asked By MICHAEL COUCH | Dec 20 11
11 Answers


In GBA Pro help | Asked By Mary Ostberg | Dec 21 11
1 Answer

In particular, a school building c. 90,000 sq feet roof Area code 06119

I was told that painting it white will be of benefit.

Also, do you know of any state/federal green building reimbursement policies that could be applicable.

many thanks,


please respond to mark.overmyervelazquez@gmail.com

In General questions | Asked By mark overmyer-velazquez | Dec 21 11
4 Answers

Can anyone help? I had a rear dormer put on my 1956 Cape Cod on Long Island this week. I will put fiberglass batts in my 2x4 walls, but is it better efficiency to use R-15 than R-13?

Also, vinyl siding is next. My installer will leave on the asbestos siding (with tar paper underneath) on the exterior walls. To minimize the existing drafts I asked to place housewrap not only on the new dormer sheathing but also over that asbestos siding, then they will add XPS.

I will cork, seal up interior for drafts. Will the housewrap be detrimental over the existing asbestos siding in any way?

In Energy efficiency and durability | Asked By Jeffrey Kolsch | Dec 20 11
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