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51 Answers

Odor problem in attic after spray foam applied


I am looking for any advice or suggestions with regards to a situation we are now dealing with in my home after changing our vented attic to a non-vented attic or semi-conditioned space.

In Green products and materials | Asked By Dave | Jul 11 10
3 Answers

Climate zone 7 air barrier and exterior foam challenge for unique existing T&G thick roof deck

Hi All,

In Energy efficiency and durability | Asked By daniel hatch | May 7 15
8 Answers

Insulating a closet over a garage slab

I am currently building a home in Central Illinois, climate zone 4. Our home has a walkout basement that extends throughout the entire first floor, except for the master bedroom closet. The closet is roughly 14 feet long by 7 feet wide. The closet essentially takes up the back portion of a single car garage. The concrete contractor poured the garage floor underneath the closet. Floor joist then run over the concrete floor. There is what I guess is a crawl space underneath the closet that is roughly 18 inches tall. I am not sure how to insulate this area. Any tips would be great.

In General questions | Asked By Jonathan Braden | May 6 15
16 Answers

'Finishing' above-grade Roxul Comfortboard: What are the best practices?

I'm building a new home. The exterior of the home, from the bottom of the basement to the edge of the roofline, is covered in 2" Roxul Comfortboard.

In General questions | Asked By Ryan Lazuka | Apr 14 15
5 Answers

Why should we shift to EPS panels for building construction instead of conventional methods?

I write this email with great respect for you. I was going through your a particular website on EPS technology and came across your profile. As I am myself a young engineer and doing research work on 3D EPS Panel. During my research i came across a few unanswered queries. I am from India and this technology is currently being used in filler walls only and not as load bearing structure, therefore i was wondering if you could help me in understanding the adaptability of this technology in advanced countries like yours as compared to India which is still a developing nation.

In Energy efficiency and durability | Asked By Sural Kaul | May 5 15
3 Answers

1953 unfinished attic floor, storage, retro install; overkill?

It looks like we've got R9 and want to get up to a total of R49 rating. There's lots of good storage space with solid wood flooring on the attic floor joists. We hate to lose all that space (and especially if we resell think it's a selling point) to blow in. I'm looking at DIYing but find so much contradictory information and opinions online it's hard to sort it all out to a novice and first time home owner. I will tell you where I live we're in zone 6, so it does get cold here.

In Energy efficiency and durability | Asked By Josh Thompson | May 7 15
15 Answers

Geothermal - Sizing Issues - 4 Ton or 5 Ton?

I live in Cincinnati, OH and I am zeroing in on purchasing a geothermal heat pump for my 5800 SF (conditioned) home. My home is all electric is currently heated by an 8 year old 4 ton air source heat pump with 15Kw electric backup. My issue is the two geothermal companies I have contacted to quote the job disagree on heating load of my home. Both companies did Manual J calculations, but are coming up with different numbers. One company has the heat load at 55k BTU -- says a 4 ton is the way to go. The other company has heat load at 68k BTU - says go with a 5 ton unit.

In Mechanicals | Asked By joel perrine | May 3 15
6 Answers

What's a good damper for a bath fan/range hood vent?

My bath fan vent is basically a big hole in the house to the exterior and sucks air out of the house in the high New Mexico winds, which today reached 30 mph. There's no damper or air check valve or anything like that installed up there, and I'd like to rectify it. What do people use for this situation? A standard butterfly damper? Something louvered? This thing? http://www.batticdoor.com/bathfandraftblocker.html

In Mechanicals | Asked By Nathaniel G | Nov 23 14
17 Answers

Need condensation control — Want a bath vent without another 4" hole outside

Any brainstorming helps.
Have "sealed" window in bath anyway but do not want to open in winter north Iowa.
Radon vent (other side house) condensates.
So I don't want to make another 4" hole for bath vent.
When I turn on radon fan I hear water slosh down in pipe that's horizontal.
And dryer is another 3" hole. That condensates too. (I tried manual fix. See pics.)
And vent stack is another 4" hole.
And gas water heater is another 3" hole out chimney.
And water pipe is another.

In Energy efficiency and durability | Asked By Charlie Darwin | Apr 30 15
3 Answers

Why select 3D EPS Panels over conventional?

Hi…As I am thinking about getting my own house constructed over 1000 sqft of area, 2BHK. Therefor I was generally looking for options and came across 3D EPS Panel technology which claims that it saves on time, labor and cost. However the contractors that I have spoken to and GBA Advisor Martin Holladay were not in favor of this technology due to its high cost. Therefore I am a bit confused whether this technology is actually cost effective or costly.

In Energy efficiency and durability | Asked By suraj kaul | May 6 15
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