Wall spray foam has a dynamic effect on your walls. Every nook and cranny becomes filled, which prevents against lost air or the entry of air from outside. These energy savings from wall spray foam can become immense: up to 50 percent off your energy bill when coupled with foam in the attic. Wall spray foam also presents a waterproof barrier to the outside. Since it does not absorb moisture like traditional insulation, it protects your siding and walls from deterioration. https://www.youtube.com/embed/ggLAUsiuI_o

Foam is very sticky; you'll need to wear disposable coveralls with a hood, and gloves, a face mask, and eye protection. It takes some practice to spray foam evenly and, because it expands so dramatically, to control its depth; 2 inches is all you need to seal the joist cavities. You need a clear area so that you can work without interruption; any pause longer than 30 seconds will clog the nozzle and require putting on a new one. It's also critical that the air temperature stays between 75 and 85 degrees.
As this example illustrates, it's important to seal the envelope completely. One of spray foam's biggest selling points is its air-sealing ability, but it can't seal places where it's not sprayed. One of the nice things about using spray foam in new construction is that you can do a Blower Door test before the drywall goes in. Even better, you can test for leaks with a fog machine. https://www.youtube.com/v/ggLAUsiuI_o?version=3

This is more common with closed cell foam, but it happens with open cell foam, too. Since closed cell foam has a higher R-value per inch, installers generally spray 2" in walls and 3" in rooflines to meet the energy code requirements of R-13 and R-19, respectively. (I'm not going to dive into the energy code here, but these numbers apply to many climate zones, the latter being allowed under the UA tradeoffs rule. See the Energy Nerd's blog on this topic if you want to argue.) http://youtube.com/watch?feature=youtube_gdata&v=ggLAUsiuI_o


Since fiberglass insulation does not stop airflow, your home loses conditioned air to the attic. As this air meets the unconditioned air present in the attic, the difference in temperatures can create condensation. If your attic is poorly ventilated, then the condensation creates the moisture necessary for the growth of mold. Attic spray foam prevents this, as it regulates the temperature in the attic and prevents the overall loss of air.
Thanks for asking for our input. I have enjoyed the 'Future House' episodes that you folks have created. And, I think that the amount of segments-per-season seems just about right - any more and it might begin to take the shows into an area that moves away from their core meaning (i.e. - home repair/rehab/construction, etc). Though, it's easy to understand how new and upcoming technologies fit well into TOH/ATOH's overall picture. Also, Ross Trethewey is a good sement host - very knoledgable and enthusiastic - and, as well, he gives the TOH/ATOH audience some 'younger blood' to continue forward with the show's traditions. My thoughts are to stick with 'Future House' segments.And, thanks for all of the good work you folks do in continuing to present to us each year such wonderful productions as TOH and ATOH, which we get to enjoy and benefit so greatly from!

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Today’s “third generation” of blowing agents have a GWP of 700 to 1000 which is still remarkably high considering water/CO2 has a GWP of 1. However, innovation from some chemical manufacturers like the Chemours Company have introduced the next generation of HFO blowing agents such as Opteon 1100, which significantly reduces the GWP impact when using closed-cell spray foam insulation products.
DID YOU KNOW? Spray FOam insulation out-performs conventional insulation materials because they (conventional insulation materials) trap still-dry air and if that air moves or becomes wet, the thermal resistance can drop by 50%. Spray Foam protects against air infiltration, which can increase energy costs in buildings by 10 to 40%. Eliminate these drafts and live in a more energy-efficient, comfortable and healthier building by choosing spray foam insulation. https://www.youtube.com/watch?v=ggLAUsiuI_o&feature=youtube_gdata
OK, Peter, I finally went back and read Alex Wilson's article on what he perceives as a serious problem. I haven't seen the full report, but based on the summary he wrote on the Green Building Advisor website, I question the science. It seems to me that he's chosen the wrong metric and he's basing his conclusion on too many assumptions because he doesn't have enough data. You can see my comments at the end of his article.

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Liquid Roof is a true EDPM rubber, and is the only one sold in liquid form. It makes installations easy. It can be described as a liquid version of the single-ply EPDM membrane that has established an outstanding performance record spanning more than 30 years. The EPDM chemistry has two unique features not possessed by any other rubber: It is unaffected by ultraviolet radiation and ozone and it can tolerate continuous exposure at temperatures above 300° F. The latter feature is also what gives EPDM rubbers the best aging properties of all elastomers (they retain flexibility longer).
There are several types of reflective roof coatings that impart varied reflectance rates/ values. Typically, the reflective coatings are what are commonly referred to as white coatings and there are also aluminum coatings typically used with asphalt. Highly reflective white roof coatings are typically comprised of acrylics, urethanes, silicones, SBS, SEBS, and other types.

c) Make sure that the over expanded access is properly removed from the walls. We had a junior cutter taking too much off by bending his saw into the cavity. Look closely at the inside wall corners, and ceiling/wall corners to make sure that the foam is properly removed flush with the studs. If it has not been cut back flush it may lead to uneven drywall finishes .
Polyurethane Spray Foam Insulation is used in industries ranging from mining to movies, from cold storage to marine flotation. Spray Foam Insulation’s ability to seal out air and insulate quickly means it’s always in high demand for residential and commercial applications. Spray Foam Insulation is critical for solving our nation’s energy challenges because it dramatically reduces the energy needed to heat and cool our homes and offices.
Thank you, Allison. We have a split system unit (actually 5) with the heat being propane. The foam guy said that it needed ventilation, so completely sealing the attic wouldn't be a good idea. It sounds like you are saying that the systems need to be vented out of the attic or replaced with some type of closed system. But I shouldn't bother spraying if the plan is to leave the soffet vents open. Is that correct?

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Ames® Roof Coatings are premium elastomeric coatings that seal out moisture, renew old surfaces and even save energy. We have products specifically formulated for all types of roofs including; Wood, Tar, Metal, Rolled Roofing, EPDM Rubber, Foam and many other surfaces. Ames’ coatings form a waterproof seal to preserve and protect your roof. Our white roof coatings reflect sunlight, substantially reducing roof temperatures. Ames® products are environmentally friendly, waterbase, non-toxic, VOC-free and water cleanup.

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In the early days of insulating attics, people believed the insulation was a heat source. That’s not the case, as the insulation is actually a barrier between two areas of different temperatures. As for the “hot roof” theory, the unvented attic system could make the temperature of the roof go up a little, but this increase won’t cause damage to your shingles.
I used this for the rim-joist in our home. A couple things: I put 1in solid core foam (cut to size) in each bay before using the spray foam. I also was able to do a relatively 'thick' spray to close off any potential gaps that may have existed. I turned off the HVAC and turned on some fans in the windows to exhaust out the fumes, and wore a mask (3m respirator).
Today’s “third generation” of blowing agents have a GWP of 700 to 1000 which is still remarkably high considering water/CO2 has a GWP of 1. However, innovation from some chemical manufacturers like the Chemours Company have introduced the next generation of HFO blowing agents such as Opteon 1100, which significantly reduces the GWP impact when using closed-cell spray foam insulation products.

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In the case you have above the installer wasn't reading his foam. They must be trained to do that as they spray. Temps and conditions are constantly changing thru out the day. Either he wasn't properly trained or if he was,he wasn't doing his job! This is a serious problem with people jumping in to the foam business. A lot of homeowners and builders are looking the best price and end up with someone who doesn't know what they are doing. Hope this info helps. Foam insulation is a great product. It just has to be done right by someone who knows what they are doing.

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Closed-cell spray foam insulation is one of the most efficient insulating materials commercially available, with aged R-Values above 6.0 per inch. Open-cell spray foam insulation is a performance upgrade over conventional insulation that leads to energy efficiency, improved occupant comfort, a cleaner indoor environment and greater noise reduction for building/home owners.
The guys who sprayed my attic were trained and certified, but I later found out, too late, that they had no experience and my attic was the first they'd ever sprayed. I was also never told to vacate my house for any length of time, and so I (and my pets) were in the house the day they sprayed and the entire time the off ratio foam was filling my home with horrendous vapors. The company kept telling me that it was a good job and I had nothing to worry about, even after I'd had 2 other experienced sprayers from 2 different companies visually examine the foam and confirm that large areas appeared to be off ratio. The 3rd sprayer from yet another company, was also outraged because the company who did my attic had failed to vacuum up all of the old cellulose insulation, and he also noticed areas where the foam was shrinking or pulling away, and this was not even 5 weeks after the spraying.  

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Henry 587 Dura-Brite White Elastomeric Roof Coating is Henry 587 Dura-Brite White Elastomeric Roof Coating is a premium high solids formula offering better weather protection solar reflectivity and longevity than economy grade reflective roof coatings. Cured coating forms a permeable membrane which prevents liquid infiltration but allows moisture vapor to vent or breathe out of underlying substrate. Recommended ...  More + Product Details Close http://www.youtube.com/watch?v=ggLAUsiuI_o&feature=youtu.be
Tucson Rubberized Coatings is on the cutting edge of technological advancement in the coating industry. From driveways to walls and rooftops, our products have you covered. Established in 1992, we have decades of research that has not only led us to create the best products of today, but is also providing the foresight in the formulation of the products for tomorrow.

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Was hesitant to buy this product because of some of the reviews but glad I did. It does just what it says and we even got the square footage out of it. You just need to read ALL the directions first and it wouldn't hurt to read some of the helpful hints in some of the reviews. It does only cover 1 inch at 600 square feet and is extremely easy to apply. Very satisfied customer!
Acrylic coatings are typically applied in two coats, with the second running perpendicular to the first. 1 gallon per 100 square feet is a good estimate for these coatings, as they do not need to be applied nearly as thick as many other coatings. These coatings can be sprayed or roll-applied. Acrylic coatings generally require a re-coat within 2-3 years of application.
I never heard of Oak Glen before, but do recognize the mountain names. I wouldn't expect to find any towering Sequoias and Redwoods there because neither species is native to that part of California, and they do take some time to become towering. And I've never heard of any overlapping of their ranges. A more suitable house for this location might get inspiration from the Monolithic Dome in Yucaipa which survived a direct hit from a wildfire.
My project was a 2 part one.  First the guest house was to be used for an elderly couple with some health issues.  The idea of using chemicals which can be harmful to the respiratory track has made me change my mind about proceeding. The guest house was single story with a low attic height and 600 square feet and the main house (part 2)  is 2,800 sq feet. After reading the comments below, I would like a quote from someone that uses a soy product that is non toxic. .  
You probably have some familiarity with spray foam insulation, and you may have even used the foam that comes in pressured spray cans at home improvement retailers. This foam is know as one-part foam, meaning that it is one continuous mixture that is simply applied to the area in need. One-part foam is frequently used for sealing small gaps and cracks. http://m.youtube.com/embed/ggLAUsiuI_o
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