The article suggests that from the air barrier location, the wall dries to interior within, and to exterior without. That's only the case when the air barrier is vapor-impermeable. We find, using thermal + moisture modeling, that most assemblies in mixed heating/cooling climates work better (stay drier) when the construction is more highly vapor permeable. Exceptions are when vapor drive is very high, such as enforced interior winter humidity (museums and other archival spaces), natatoria, etc.
Tanya,
In regards to open-cell spray foam insulation it is a great choice epsecially in your application. With the right type of spray foam equipment open-cell foam applied in an attic is a superior choice. The benefit of the open-cell in an attic space is while it does have lower R-values per inch than closed-cell, it will allow you to achieve the higher R-value requirements needed in most climate zones while keeping the cost down. When it comes to deciding to insulating the floor or rafters, that is typically based on the answer to the question is the attic space going to be a...
I too have been trying to find a non-toxic sofa and am frustrated by the lack of options.
I have a ratty-looking but structurally-sound sofa and am considering having it restuffed and reupholstered. Do you know the relative merits of the different types of replacement stuffing? Obviously I want to avoid flame retardants, but are there any good natural alternatives to polyurethane?
Some natural sofas use latex cushions, but I can't help wondering if that would have a strong odor.
I am a little (a lot) late to this conversation, but I think the only wood-burning appliances should be direct vent masonry ovens which burn at such high temperatures that they burn off all the nasty particulates and gases. And even then, they should only be used in an emergency situation, where power is out for an extended period of time.
Wood burning in my area (near Fresno, CA) destroyed my health and made me chemically hypersensitive. Not just residential wood burning, but also the nasty, dirty practice of agricultural waste burning.
Combustion appliances are really...
Am hearing about this new technology and seeing positive reviews online but have also being told that they're not appropriate for larger, older homes. What are the challenges and limitations of heating an older, larger home with a new heatpump system?
Hi Patsy,
This listing is just for BlueskinVP, not Air Bloc (a fluid-applied product), which we do not list. On the landing page you have to click on the sheet-applied product tab, but it is not exactly intuitive, so I have changed the url so it directs people to the specific BlueskinVP 160. Thanks for bringing this to our attention.
Note that when you search the Henry's website for Blueskin, you're directed to a page that has 3 products with Air bloc in the name. The Air Bloc 33 has phthalates.
I am looking for an expert opinion regarding open-cell water-based foam. It is clearly less expensive, and admittedly a bit less effective, than closed-cell foam. Is it worth considering, especially for attic insulation? AND, is it better to insulate the attic floor or the attic rafters. Any advice would be greatly appreciated!
Great Content, I was finding difference between adhesives and sealants and got only one that that sealants typically have lower strength and higher elongation than do adhesives, Is there any other difference that will help me, as I am using Acrylic Adhesive for some Industrial use is their any other which is best in case of fixture time and power?
Charles,
In our case I think the air barrier (Huber's Zip sheathing) is vapor-impermeable to a significant extent. It is a coated sheathing product that I see widely used in highly energy-efficient building enclosures, such as Passive House projects. I have wanted to get my colleague to to do some WUFU runs on the project.
The article suggests that from the air barrier location, the wall dries to interior within, and to exterior without. That's only the case when the air barrier is vapor-impermeable. We find, using thermal + moisture modeling, that most assemblies in mixed heating/cooling climates work better (stay drier) when the construction is more highly vapor permeable. Exceptions are when vapor drive is very high, such as enforced interior winter humidity (museums and other archival spaces), natatoria, etc.
Tanya,
In regards to open-cell spray foam insulation it is a great choice epsecially in your application. With the right type of spray foam equipment open-cell foam applied in an attic is a superior choice. The benefit of the open-cell in an attic space is while it does have lower R-values per inch than closed-cell, it will allow you to achieve the higher R-value requirements needed in most climate zones while keeping the cost down. When it comes to deciding to insulating the floor or rafters, that is typically based on the answer to the question is the attic space going to be a...
I too have been trying to find a non-toxic sofa and am frustrated by the lack of options.
I have a ratty-looking but structurally-sound sofa and am considering having it restuffed and reupholstered. Do you know the relative merits of the different types of replacement stuffing? Obviously I want to avoid flame retardants, but are there any good natural alternatives to polyurethane?
Some natural sofas use latex cushions, but I can't help wondering if that would have a strong odor.
I am a little (a lot) late to this conversation, but I think the only wood-burning appliances should be direct vent masonry ovens which burn at such high temperatures that they burn off all the nasty particulates and gases. And even then, they should only be used in an emergency situation, where power is out for an extended period of time.
Wood burning in my area (near Fresno, CA) destroyed my health and made me chemically hypersensitive. Not just residential wood burning, but also the nasty, dirty practice of agricultural waste burning.
Combustion appliances are really...
I am looking for an expert opinion regarding open-cell water-based foam. It is clearly less expensive, and admittedly a bit less effective, than closed-cell foam. Is it worth considering, especially for attic insulation? AND, is it better to insulate the attic floor or the attic rafters. Any advice would be greatly appreciated!
Great Content, I was finding difference between adhesives and sealants and got only one that that sealants typically have lower strength and higher elongation than do adhesives, Is there any other difference that will help me, as I am using Acrylic Adhesive for some Industrial use is their any other which is best in case of fixture time and power?
Hi Alex, I am considering repping this but am given some pause from this from a swiss doctoral dissertation:
Diploma Thesis
Department of Environmental Science
ETH Zurich
Simone Hegner
September 2007
Supervisors
Prof. Dr. Dieter Imboden
Dr. Michael Kost
The insulating material cork slab is characterised by a low...
Cork seems like a really great substitute for plastic foam-board insulation for sheathing. While expensive and only available from the Mediterranean Region now, perhaps the trees could be grown in more different areas of the world. This type of insulation is yet another way to sequester "tree concentrated" carbon into structures.
We are using this technology on a large 150,000sf new corporate headquarters in Princeton NJ with a large amount of exterior glass curtain wall on the South and West facades and expecting to achieve significant energy savings, glare control, and improved comfort as a result, according to our energy model. We have been working closely with Aplen on the project and found them to be a great source of knowledge and extremely cooperative.
Am hearing about this new technology and seeing positive reviews online but have also being told that they're not appropriate for larger, older homes. What are the challenges and limitations of heating an older, larger home with a new heatpump system?
Hi Patsy,
This listing is just for BlueskinVP, not Air Bloc (a fluid-applied product), which we do not list. On the landing page you have to click on the sheet-applied product tab, but it is not exactly intuitive, so I have changed the url so it directs people to the specific BlueskinVP 160. Thanks for bringing this to our attention.
Note that when you search the Henry's website for Blueskin, you're directed to a page that has 3 products with Air bloc in the name. The Air Bloc 33 has phthalates.
Kathleen, I apologize if this was confusing. We use CSI Masterformat numbering to organize the product listings in GreenSpec. I'm not totally sure I understand your comment, so if you can clarify how this is confusing, I'd appreciate it.
if you are going to list the sci spec number you should let people know that it is not the spec.
FYI
This product is not sold in the US. It is not manufactured with US fittings. I'm going to purchase one and work with my plumber to see if we can adapt it, but for now, this isn't going to work for most US projects...
Just got an announcement about Teragren's new Vantage line--engineered strand bamboo flooring that entirely FSC certified. Cool!
70.00 dollars per gallon is a concern.
But using the 80/20 rule the labor cost is the main issue.
[compate with 50,00 dollars for BenWood]
concerns would be it's ability to stay clear and avoid yellowing
A sample is being sent to us for further testing.
Hi John,
MSDSs are notoriously confusing. The formaldehyde levels on DriCore's MSDS look like they are the regulatory limits for ACGIH and OSHA and not the tested values of this product.
The reason might be as follows. The core of Dricore is OSB, and OSB typically uses a phenol formaldehyde (PF) resin. OSB is exempt from...
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Charles,
In our case I think the air barrier (Huber's Zip sheathing) is vapor-impermeable to a significant extent. It is a coated sheathing product that I see widely used in highly energy-efficient building enclosures, such as Passive House projects. I have wanted to get my colleague to to do some WUFU runs on the project.