Community: General questions

Q & A Instructions

[Click map to enlarge]

The web site has a wealth of articles on a wide variety of construction topics. Before posting your question, you may want to check out the articles on this page: How To Do Everything. You just might discover an article there that provides the information you seek.

Please register for a free account or sign in to ask and answer green building questions.

If you want to post a question, the usual rules of courtesy apply:
1. Be nice.
2. If you can't be nice, be polite.
3. If you can't be nice or polite — well, please be brief.

To attach a photo or illustration: Under the box labeled “More explanation,” look for the words “File attachments.” Click that, and you should be able to attach a photo.

Thanks for joining the conversation!

0 Answers

Attic Kneewall Insulation

I have a raised heel truss system. The contractor installed wall sheathing up to the bottom of the truss 2x4 as shown in attachments. My overhang is 2' so I will have ~2' of soffit. I will vent according to the sq. footage of my ridge vent (hip roof). I am wondering if it is best to leave these gaps alone, at 3.5" tall or if I should put scraps up and make them closer to 2" tall, or if I should block the ones that will not line up with the vented soffit locations completely.


Asked By Nicholas C | Oct 3 15
7 Answers

Roof construction for low-slope roof


Asked By Kevin Hoene | Sep 21 15
4 Answers

Cut and Cobble


This is a follow up to my original post seen here:

Getting ready to begin this ceiling insulation project using the "cut-and-cobble" method. I have a few more questions.
1. would it be better to use XPS product or something like R-Tech?
2. I will be using can spray foam for the gaps, but how do we attach to underside of the roof sheathing?

Asked By Rob Henderson | Oct 3 15
13 Answers

Ideal window rough opening gap for good air sealing

The manufacturer I'm ordering windows from allows a rough opening gap around the window of 3/8" to 1/2" from all 4 sides (so the rough opening would be 3/4" to 1" wider & taller than the window).

Asked By Nick Hall | Sep 28 15
4 Answers

Odour from Certainteed fiberglass insulation

We just had some Certaineteed fiberglass insulation installed,in our house and have noticed a very strong odour from it. I thought it would dissipate relatively quickly but after 4 days , it is still quite noticeable. In fact, the odour was so strong that we had to go to a hotel because it made my wife sick.

As anyone ever had this experience with Certainteed fiberglass insulation before?
I have worked with other brands of insulation in the past and cannot ever recall that strong of an odour.

Does anyone have experience with Certainteed?
Is this normal for Certainteed?

Asked By Aaron Gatzke | Oct 3 15
3 Answers

Insulation for radiant staple up

Hi, we are building a home in climate 5. The house will have geothermal with radiant heat in the basement slab and the first and second floors. We intend to finish the basement at a future date but not right away. Our contractor was planning to staple up the insulation with aluminum transfer plates and insulate with the foil bubble wrap stuff (thick foam under the basement slab.). I have read a lot about insulation for this type of application and it sounds like the foil bubble wrap stuff has little value.

Asked By Mel Tillyard | Oct 2 15
8 Answers

Antique house #1: Cedar Roof

I will likely be taking on a crazy project in the next few months - buying an old house in Rhode Island, and improving it, on speculation.

The general scheme is to
--Do minimal work on the older (about 325 years) portion of the house,
--Expand/rebuild the newer (about 115 years) section with modern kitchen, baths, windows, etc.
-- Remove ugly garage, breezeway, and dormer.

Asked By curtis betts | Sep 30 15
0 Answers

penguins winter classic jersey new york rangers hoodie

It was a more difficult times for any Canadiens for a team, and it also only so transpired to drop at the time of Koivu's period as chief, 1 where he was normally at the mercy of judgments for his particular inability to present People from france so that you can Montreal's majority Francophone group of followers. [url=]rangers winter classic jersey[/url]

Asked By brandicecp jeaninebthUT | Oct 3 15
2 Answers

Can I use Durarock for exterior sheathing behind a stone Face?

I am building a garage with 2X4's spaced 16" on two layers of block in zone 5, only a stones through from zone 6 in upstate NY. Most of the walls will be sheathed with 7/16" OSB covered with tyvec, a coraplast rain screen, and sided with various LP smartside products. The inside of the stud bay's for now will not have insulation, yet I plan on using either fiberglass batts, or blown cellulose and sheet rock in the future to finish of the inside. Also at some point I plan on using a small wood stove to heat it periodically to thaw out cars and other things.

Asked By Dillon Vautrin | Oct 2 15
12 Answers

Bleaching mold on sheathing?

I'm building our house in Wisconsin, where we had a very wet June with 10 inches of rain while framing. The interior side of our 1/2" plywood sheathing has dried but has developed spots of mold. I'm considering misting it with a bleach mixture and letting dry well before insulating, rocking etc. The finished wall system will dry to the exterior, with 3" of Roxul Comfortboard IS on the exterior and Roxul comfort batts in stud cavities.

Any opinions on whether this is necessary? If yes, how strong should my bleach solution be?

Asked By Edward Krause | Oct 4 14
Register for a free account and join the conversation

Get a free account and join the conversation!
Become a GBA PRO!