R-value is the term given to thermal resistance to heat flow. The higher the R-value of an insulation product, the more effective the insulation properties. Spray polyurethane foam comes in a range of densities and cel structure. Low density foams are referred to as Open Cel SPF while higher density foams are referred to as Closed Cel foam. 1.8-2 pound polyurethane foam has the highest R-value of readily available spray foam insulation used in homes and buildings.[4]
Spray foam insulation works by sealing the building envelope to stop conditioned air from escaping and prevent unwanted outside air from entering your home. It allows efficient use of your HVAC system and helps regulate the temperature fluctuations and humidity in your home. It's a lightweight, durable, and versatile insulation solution boasting the industry’s strongest performance in energy efficiency and energy cost savings.

You’ll have to install a new tip every time you stop spraying for more than 30 seconds because the foam will set inside the nozzle and clog it. Spray foam kits come with extra tips, but it’s still important to (1) clear the room of everything that could get in the way, (2) decide which areas you’ll spray first, (3) put ladders wherever you need them, and (4) set up a fan or two to vent the fumes outdoors.
Here's a simpler, less expensive alternative: Cut some 2-inch-thick rigid-foam insulation and glue it to the subfloor between the joists or support it with nails driven partway into the joists. Then fill any gaps between the edges of the foam boards and the joists using the canned spray foam sold at home centers or hardware stores. An even easier option is to nail the foam panels against the bottom edge of the joists and seal the joints with canned foam, but you'll lose some headroom and access to any pipes and wires between the joists. As with spray-foam kits, protect yourself and the floor from the dripping globs of canned foam. A full face shield, gloves, and a hat would be a good start.

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These coatings are emulsified asphalt and consist of asphalt particles dispersed in water; they utilize clay as the emulsifying component. These coatings also contain many types of organic and/or inorganic fibers and fillers to provide extra strength to the coating. These coatings are available in black, brown, or as a reflective coating when titanium dioxide or aluminum pigments are added.

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These coatings are emulsified asphalt and consist of asphalt particles dispersed in water; they utilize clay as the emulsifying component. These coatings also contain many types of organic and/or inorganic fibers and fillers to provide extra strength to the coating. These coatings are available in black, brown, or as a reflective coating when titanium dioxide or aluminum pigments are added.
Spray polyurethane foam, or SPF, is the main type of 2-part, closed-cell spray foam used by insulation contractors. Large-scale insulation jobs require special equipment as well as safety gear to protect the installer from chemical fumes during installation. When the foam cures and hardens just several minutes after application, it's completely safe for as long as it stays in place.

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While coatings may potentially stop minor leaks, the roof should be properly repaired and dried prior to coating application. Coatings may be able to seal pinhole leaks, which are leaks not visible to the naked eye. If the roof is leaking, the roof leak will need to be identified and repaired prior to any recoating; do not expect the coating to find and seal the leaks.

These coatings contain various types of acrylic polymer, and are typically formulated to help extend the coating’s life and improve durability. Acrylic coatings are available in a number of colors but are most commonly used as white reflective coatings. Thanks to its durability and low cost, many contractors and facility managers believe this to be the best roof coating.


Small imperfections in the building envelope (holes, cracks, gaps) not properly sealed will eventually lead to poor building performance or worse, moisture accumulation, allergen/pathogen growth, and very possibly structural failure. The solid nature and sealing capability of closed-cell spray foam, inhibits moisture-driven elements. Two inches of closed-cell spray polyurethane foam insulation will minimize air infiltration, exfiltration, convection, conduction and control solar driven moisture in the building envelope. https://www.youtube.com/watch?v=ggLAUsiuI_o&hc_location=ufi
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
Spray foam insulation, also known as foaming insulation or sprayed insulation, is a two-part liquid insulation material that insulates and air seals wherever it is applied. The material comes in two large 55 gallon drums – an iso and a resin. These two liquids are kept separate until applied at the jobsite by a qualified, licensed spray foam installer. The two liquids travel up through a heated hose to the spray gun where they are combined to create the foam. The foam expands within seconds to fill the cavity surface.  Depending on the type of sprayed-in foam insulation used, closed-cell or open-cell, the foam expands between 40 and 100 times its size upon application. 
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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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.
KARNAK manufactures a complete line of sustainable roof coatings, sealants, and waterproofing solutions certified to comply with UL, FM, CRRC, ENERGY STAR®, Dade County, Title 24, and Florida’s HVZ building code. Our ENERGY STAR-labeled coatings can help buildings obtain LEED points. With four factories and seven warehouses across the U.S., KARNAK’s dedicated sales and customer service team will deliver the products you need in less time than it takes our quick-dry 535 Envirolastic to cure.

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Get the Power to Seal & Insulate Perfectly in Just 5 Minutes. The Foam it Green Promise: 1>Simpler, Easier, Faster Spray Foam 2>No Special Skills or Know How 3>Professional Results or Better Saves You Time, Money and Hassles. Delivers to your door, ready to use. Just follow the simple instructions. Saves Energy with High R-value Closed Cell Foam. R-Value of 7 in Just 1 Inch. Provides a seamless air barrier in 1 step. This Kit Provides Approx. 602 Square Feet at 1” thickness of cured foam. Class I E-84 Fire-Retardant Foam that meets building code specs. This Anti-Microbial Formula passed the stringent ASTM G-21 test for preventing mold growth on the surface of the foam. Includes everything you need to complete your project. Weighs 120 lbs, including steel canisters pressured with nitrogen. Orders with multiple kits on it may ship via LTL instead of UPS. The LTL carrier calls to arrange a convenient delivery time. Usually Ships Same Business Day. See Manufacturer for returns and warranty policy.
Heatlok Soy 200 Plus®, is our high-performing, versatile spray foam insulation for commercial and residential construction. Our unique formula incorporates recycled plastic bottles and renewable oils to create our high-performing, closed-cell spray foam insulation. Heatlok Soy 200 Plus has a high R-value of 7.4 at 1 inch, and a density of two pounds. This polyurethane insulation combines multiple control layers into a single application, saving both time and money in construction costs. With our innovative technology, Heatlok Soy 200 Plus is developed with 14 % renewable and recycled content, and is the ideal choice for commercial, residential, and multi-family construction.
Most closed-cell spray foam is now formed using hydrofluorocarbon (HFC) blowing agents that have high global warming potential, partially or completely offsetting the climate benefits of the energy savings they can offer. In the United States, HFCs are scheduled to be phased out by January, 2021. A few spray foam suppliers have started supplying spray foam blown with hydrofluoroolefin (HFO) blowing agents without this problem as of early 2017.[14]

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Spray foam insulation comes with many benefits over traditional fiberglass or cellulose products. When used throughout the walls and attic, spray foam insulation can save huge percentages off your structure’s heating and cooling costs. This remarkable product accomplishes this through its airtight nature. Spray foam insulation creates a complete seal between your home and the outside.
While coatings may potentially stop minor leaks, the roof should be properly repaired and dried prior to coating application. Coatings may be able to seal pinhole leaks, which are leaks not visible to the naked eye. If the roof is leaking, the roof leak will need to be identified and repaired prior to any recoating; do not expect the coating to find and seal the leaks. http://m.www.youtube.com/embed/ggLAUsiuI_o
Spray polyurethane foam (SPF) is a spray-applied plastic that is widely used to insulate buildings and seal cracks and gaps, making the building more energy-efficient and comfortable. SPF insulation is known to resist heat transfer extremely well, and it offers a highly effective solution in reducing unwanted air infiltration through cracks, seams, and joints. http://www.youtube.com/watch?feature=youtu.be&v=ggLAUsiuI_o
I've seen this only once, and it was with closed cell foam, but I've heard of it happening with open cell foam, too. I don't know the details, but I've heard it could result from a bad batch of chemicals, improper mixing, or too high a temperature. Whatever the cause, it's not a good thing. The photo below shows how the spray foam pulled away from the studs. A little bit of uninsulated area like that adds up to a lot of heat loss/gain when the whole house has that problem, as it did here.
RE: my June 12 post...We went ahead and had the attic sprayed with a Soy-based product. Stayed in a hotel for 3 nites. Still smelled a little bad but that's gone away over time. I'm very glad we didn't use the other foam as even that much outgassing of a petrochemical could have sent my wife to the hospital. Unfortunately, the spray crew didn't speak English(at least not to me) and were kinda lazy, so they ended up spraying over some can fixtures from the kitchen below that were not insulation-contact rated. So I hired an electrician to come out, pull down the cans, pull out what he thought was an appropriate amount of foam to create a big enough air space and then re-install the cans. I billed the firm for the electrician plus an extra night we had to stay in the hotel and they paid, no questions asked. Guess they knew they had screwed up.  

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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.
Heat which is created elsewhere that is transported by means of a fluid, such as water or in our case air. Spray foam insulation's most important attribute is the ability to air seal creating a custom airtight envelope within the building structure. The added benefit to air sealing is the ability to block convective heat transfer from interior to exterior during heating months and vice versa during cooling months, as the heat cannot escape through gaps in the buildings envelope without the aid of air movement from infiltration as a means of transport.

Unlike fiberglass, cellulose or other loose fill products, our Foamsulate products can be applied with precision almost anywhere, expanding to completely fill gaps and spaces with a long-lasting solid. No matter how irregular the shape, how rough the surface or how hidden the area, Foamsulate products create an exact fit and an effective, high-quality air barrier that lasts. Foamsulate™ can be used wherever air can get in:

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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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We are turning our roof into an unvented roof assembly by raising the roof and blowing in SPF. We are planning to leave the existing vapor barrier down but remove the fiberglass batting and then adding 6" of SPF in all the cavities, to completely seal and insulate the house. Should we have any concerns about doing it "upside down" and not spraying the foam directly to the underside/sheathing of the roof?
Small imperfections in the building envelope (holes, cracks, gaps) not properly sealed will eventually lead to poor building performance or worse, moisture accumulation, allergen/pathogen growth, and very possibly structural failure. The solid nature and sealing capability of closed-cell spray foam, inhibits moisture-driven elements. Two inches of closed-cell spray polyurethane foam insulation will minimize air infiltration, exfiltration, convection, conduction and control solar driven moisture in the building envelope.
Solvent-based polyurethane coatings have excellent adhesion and when used as a base coat over asphalt, EPDM, TPO or PVC, it eliminates the need for a primer. The resulting savings on labor and material more than offsets the higher cost of the product. When top coated with silicone, it gives you the best of both worlds. It's also an excellent gutter and RV coating.
You’ll have to install a new tip every time you stop spraying for more than 30 seconds because the foam will set inside the nozzle and clog it. Spray foam kits come with extra tips, but it’s still important to (1) clear the room of everything that could get in the way, (2) decide which areas you’ll spray first, (3) put ladders wherever you need them, and (4) set up a fan or two to vent the fumes outdoors.
Johns Manville Corbond III® closed-cell spray polyurethane foam insulation offers and R-Value of R-7 per inch and can be applied in a single pass to a maximum of 3.5 inches, providing superior thermal performance with seamless air sealing and moisture control in a single step. Multiple immediate passes, with no wait time, may also be applied. With high yield and excellent adhesion, it's an ideal choice for high-performing energy efficient commercial, residential and industrial applications. https://youtube.com/watch?v=ggLAUsiuI_o
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