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52 Answers

The differences between mass and insulation

The "I installed more attic insulation and now my AC runs more" thread got me thinking about the mass effect a bit.

Asked By Nathaniel G | Sep 15 14
3 Answers

Seeking underlayment material for exterior wall shingles.

I own a home built in 1965. It has cedar shingles as the exterior wall surface. I will be rebuilding a section of one wall as part of a project to replace a rotted window.

The problem is that the original construction includes a material that I can't find, and I'm not sure what could be used as a substitute.

Asked By Don Boettger | Sep 18 14
6 Answers

Chemical smell in a new construction crawl space

Hi folks, great site.

I have a crawlspace in a new house that smells of chemicals. The dirt floor is sealed with a vapor barrier and the walls have Spray Foam Insulation. The space is pretty airtight.

My ERV was installed incorrectly (another story) and sometimes the smell from the crawlspace comes up into the house. Makes my eyes burn, and it gives me a headache. Hopefully that will be fixed this week!

Should I be able to smell the foam 2 months after it has been installed?

Asked By Brett Michaels | Sep 1 14
11 Answers

Doors: blowing agents and thermal bridging of multi-point locks

I've been shopping for doors, and mostly looking at foam-filled fiberglass in order to get a decent R-value. Most are polyurethane (PU) foam, and I'm guessing that they use HFC if not HCFC blowing agents. I'm not thrilled by the global warming impact of those. But it seems very difficult to find any information on what blowing agents they use.

Asked By Charlie Sullivan | Sep 4 14
15 Answers

Bio Ethanol Fireplaces

We have a client that is intereted in the use of a Bio Ethanol Fireplace. I am a abit concerened on storing the fuel and the requirement by the manufacture of leaving a window open when using?

Asked By Steve Theis | Sep 15 10
24 Answers

Solar panels for electricity generation

I would like to decide on putting in solar panels to reduce energy costs.

I have read about the next generation solar panels not being to far off.

Question: Would it be better to install current solar panels or wait for the new type that will be coming shortly?

Asked By John Alberti | Aug 26 14
0 Answers

I am considering using Boral TruExterior trim on a new house in lieu of Azek board

I am considering using Boral TruExterior trim on a new house in lieu of Azek board. I have been told that the product offers equivalent performance for less money.

Anybody have any opinions regarding this product?
Thanks.

Asked By Chuck Plaisted | Sep 3 14
4 Answers

Acoustical caulk/sealant confusion

I keep hearing the term "acoustical sealant" in the context of air sealing, as in "use acoustical sealant for air sealing because it remains flexible", but am a little bit confused as to what it means. Does it refer to:

  1. Tremco accoustical sealant, the specific product?
  2. Any caulk or other sealant that exhibits the "remains flexible forever" property?
  3. Something else entirely?
Asked By Aaron Birkland | Aug 29 14
8 Answers

Rigid foam insulation

We are doing rigid foam on 4500 sq. ft. of exterior walls at 4" thick and 4500 sq. ft. of roof at 8" thick in a REMOTE application.

We are attempting to find the best value for our exterior foam insulation.

So far the best value ($26 for 2"x4'x8') we could find was NeoPro TK. Seems to be a new product so not a lot of info on this "revolutionary" new material. http://www.permarproducts.com/insulsheathing.html

Our previous first choice was Foamular 250 http://www.foamular.com/foam/products/foamular-250.aspx, until we started getting quotes ($34 for 2"x4'8').

Asked By Eric Burhop | Aug 20 14
2 Answers

Why I really don't like polyiso anymore (or why Roxul is way better choice)

HI all

Thanks to Dana and Martin (and others) for earlier comments and guidance on my new house build. To be filed under the you cant make this $hit up, it burned down right before we moved in (VOC spontaneous combustion - re stain rags on the pine ceiling/walls really can occur).

soooo, we get to take apart what we just built and analyze it. and improve upon it the next time (deconstruction under way now, framing to start about labor day).

Asked By pat rowland | Aug 18 14
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