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9 Answers


I have a new, well insulated (walls R-40, Attic R-70) and well sealed (350cfm@50) 3000sqft home in Northern Vermont. The max heat loss is roughly 20k/hr. I heat the home using two Mitsubishi Hyper-Heat mini splits that are located on the first and third floor. The home is all electric.

In Mechanicals | Asked By Graham Mink | Aug 20 11
5 Answers

Any recommendations or experience shared would be welcome!

I am about to start construction on a home built with SIPs. I was going to use Grailcoat but have seen here that people have had trouble with cracking and water damage to the OSB skin. My builder thinks you always need some kind of gap to allow moisture to move between the OSB and the exterior. I would like a "stucco look" and am looking at elastomeric paints with sand added to one coat or grailcoat like product.

In Green products and materials | Asked By Ray Skinner | Aug 18 11
2 Answers

When using ICF construction for walls that run to the rafters and you would like to construct an interior wall for electrical and other services where do you place the vapour barrier if any any?

In General questions | Asked By Evan Williamson | Dec 23 09
3 Answers

In my bedroom I have a brick wall that all the day is getting sun by this reason this bedroom is a quite hot.

What would you recomend me for isolate the heat.

Thank you

In General questions | Asked By Francisco Javier Aguilar Torres | Aug 20 11
3 Answers

Location: Massachusetts

In Energy efficiency and durability | Asked By Steven O'Neil | Aug 19 11
3 Answers

I am not sure how long this product has been out but it looks to offer some great glazing options for those of us looking for high SHGC's and low U values.


In General questions | Asked By Garth Sproule | Aug 20 11
1 Answer

GacoFireStop open-cell spf claims to be used w/out additional ignition barrier in atticks.

In General questions | Asked By john hyer | Aug 20 11
4 Answers

We are trying to add insulation to a 2800 s.f. federal style timber framed home built c.1800 on a stone foundation that may be as old as the 1630s. The property is located within the city limits in Boston and is protected by Historic Landmark status, which means we need to preserve any exterior features that are original to the house, or interpreted to be consistent with the era. There is much more flexibility with the interior.

In Energy efficiency and durability | Asked By Gregory Caplan | Aug 20 11
6 Answers

Does anyone know if problems with closed-cell and open-cell spray foam insulation can occur when the installer does not clean out the line and shoots one right after/on top of the other?

The reason that I am asking is that my family and I are experiencing severe off-gassing due to another Demilec disaster. We have been in our home for 1.5 years now and my husband is severely allergic to the spray foam insulation. I get bad headaches almost daily. We are wondering if anyone knows about this?

Both Demilec and the installer are not helping at all. Also please view the link below.

In General questions | Asked By ROBERT L NISWONGER JR | Jul 19 11
11 Answers

This section


seems rather low on detail. Diagonal metal strapping: let's discuss it. I certainly understand its point, but please explain its successful implementation.

Looking elsewhere on the internet, in this article by Martin

In General questions | Asked By Minneapolis Disaster | Aug 19 11
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