I don't know if it's common or uncommon, but installing a layer of rigid foam above your roof sheathing in order to interrupt thermal bridging is always a good idea, and is preferable in all respects to a roof assembly without any rigid foam above the sheathing. If you decide to install rigid foam above the roof sheathing, you shouldn't use closed-cell spray foam under the sheathing; either use open-cell spray foam (which is vapor-permeable) or a fluffy insulation like cellulose, mineral wool, or fiberglass (any of which will allow the roof sheathing to dry to the interior).

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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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Before you decide on spray foam or another method of insulation, it's important to understand the superiority of spray foam compared to traditional materials. When compared to fiberglass batts, spray foam offers nearly double the R-value per inch, achieves air-sealing and insulation in one step, won't be damaged by mold or moisture, and won't settle, compress, or otherwise be damaged to the point it needs replacement.

Yes, you're right that all of the problems mentioned above are related to the installer. I didn't try to hide that and even used the word 'installer' in two of the four headings. I can see how you'd think that the title is misleading, but in the end you can't separate spray foam insulation from its installation. Some people have the mistaken impression that if you get spray foam in your house, your home will outperform all others. My point here is that that's not true. http://www.youtube.com/v/ggLAUsiuI_o?version=3


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Whether you’re sending something fragile in the mail or keeping valuables safe during a move, secure packing is everything. To protect a delicate item, simply fill a spare shopping bag half-full with spray insulation foam and place in the bottom of a box, pressing the item gently into the bag as it hardens to cushion the item. Repeat for the top and you have a DIY custom packaging solution that can handle the rigors of delivery.
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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Heavy-duty fibered repair mastic designed to patch roof Heavy-duty fibered repair mastic designed to patch roof surfaces. Use in wet or dry conditions to seal and stop leaks around flashings skylights vent pipes chimneys and valleys. Wet-R-Dri roof cement is ideal for the repair of cracks seams and holes in all roofing materials. It is also excellent for ...  More + Product Details Close

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once the foam is installed correctly, it is a inert plastic not much different than the foam cushions you sit on. there is not a health rick unless you have off ratio uncured foam that has not mixed properly. the foam is absolutely a health risk in its raw forms before it is mixed and cured. You should not be in the building without proper respirators and eye protection. The spray foam industry should be controlled and regulated by the same standards, testing and inspections that framing ,electrical and plumbing are. until that happens then you will have idiots with spray rigs ruining peoples homes and ruining the market for honest foam contractors that know how to price a job fairly and complete it correctly. http://www.youtube.com/embed/ggLAUsiuI_o
Installing spray foam is easy to do and can dramatically improve a building or home’s energy efficiency and thermal resistance. Our closed cell foam is so efficient just 3 inches of foam appled inside of wall cavities provides an insulation value of over R18!. Our products are specially formulated for both new construction and existing homes and buildings.
Open-cell is also known as half-pound foam. It has an R-Value of 3.5-3.6 per inch, and its density is bout 0.5 pounds per cubic food. Low-density foams like these are made partially from raw biological materials Carbon dioxide or water is also used in the makeup. Open-cell uses far less material than closed-cell, but its R-Value is lower. Also, open cell requires a vapor retarder (like gypsum wallboard) and is riskier when used for roof sheathing. It's not highly recommended that you use open-cell insulation if you live in a cold climate unless you have that extra barrier. You should also compare how much money you spend versus how effective the open-cell insulation is wherever it's installed.
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.
Staple plastic to the framing around the windows (and doors). Don’t worry about covering the gap between the window and the framing because you’ll want to fill those with low-expanding canned foam specifically designed for windows. Cover all the switch and outlet boxes with masking tape so you don’t fill them with foam. You don’t need to use gasketed electrical boxes when you insulate exterior walls like you would if you were using fiberglass—the foam will air-seal around the box.
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.
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
As an industry leader in high performance building products, we were the first in the world to commercialize the latest state-of-the-art spray foam insulation technology. Our corporate headquarters in Houston, TX is home to multiple laboratories, customer care, technical services and a world class manufacturing plant that produces spray foam and elastomeric roof coatings. We are constantly striving to raise the bar in energy efficiency and sustainable building practices.

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NovaTuff PC-425 An Epoxy Protection Coating, similar to NovaTuff PC-450 but with enhanced flexibility and adhesion. Waterproofing grade. Formulated for continuous underwater submersion and for waterproofing pools, ponds, fountains, tanks, waterfalls etc. Mini-fiber additive aides in bonding/adhesion to difficult surfaces. Excellent chemical and abrasion resistance. Resistant to acids, solvents, caustics, hydrocarbons, salt water, etc. Use submerged or above grade. https://www.youtube.com/v/ggLAUsiuI_o&feature=youtube_gdata
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!

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To avoid the expense re-roofing a house that is simply suffering from nail fatigue, and to obtain optimum insulation, an 85mm layer of polyurethane foam can be sprayed onto the underside of the slates or tiles of a pitched roof. This stabilises and weatherproofs the roof by fixing the nails, battens and roofing felt. As the foam is a superior insulant, coupled with just 100mm of insulation at joist level, your roof will also meet the stringent thermal performance standards required for a new home. A typical roof can be insulated using the polyurethane treatment for around half the cost of re-roofing. https://www.youtube.com/watch?feature=player_embedded&v=ggLAUsiuI_o
Ames® elastomeric waterproof roof coatings are premium 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. From flat roof coating to plywood roof coating, Ames’ liquid rubber roof paint coatings form a waterproof seal to preserve and protect your roof. Our white roof coatings reflect sunlight, substantially reducing roof temperatures and helping you save on cooling costs. Ames® products are environmentally friendly, water-based, non-toxic, VOC-free and can be cleaned with water. If you’re looking for how to seal a flat roof, pitched rolled roof, or just about any other kind, our elastomeric waterproof roof coatings can help you get the job done.
As an industry leader in high performance building products, we were the first in the world to commercialize the latest state-of-the-art spray foam insulation technology. Our corporate headquarters in Houston, TX is home to multiple laboratories, customer care, technical services and a world class manufacturing plant that produces spray foam and elastomeric roof coatings. We are constantly striving to raise the bar in energy efficiency and sustainable building practices.

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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. https://www.youtube.com/watch?v=ggLAUsiuI_o&feature=share
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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Loctite TITE FOAM Window and Door is a Loctite TITE FOAM Window and Door is a new generation of polyurethane-based insulating foam sealant that expands to fill seal and insulate around window and door jambs. Loctite TITE FOAM is a minimal-expanding foam based on purified and concentrated ingredients that provides four times more density versus conventional window and ...  More + Product Details Close
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!
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.

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The problem was that the installer was doing his first spray foam job ever, and the thickness of the insulation varied from zero (visible roof deck) to about 9". Unfortunately, good average thickness doesn't cut it. The coverage needs to be uniform because a lot of heat will go through the under-insulated areas. (See my article on flat or lumpy insulation performance.)

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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.

where can you buy spray foam insulation


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.  
Roof Coatings should not be confused with deck coatings. Deck coatings are traffic bearing - designed for waterproofing areas where pedestrian (and in some cases vehicular) traffic is expected. Roof coatings will only waterproof the substrates but will not withstand any kind of on going use by people or vehicles (such as walkways, patios, sundecks, restaurants, etc.). http://m.www.youtube.com/watch?feature=player_embedded&v=ggLAUsiuI_o
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.

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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.

how much is spray foam insulation for attic


Sealection 500 is a spray-applied adhesive, which once applied, expands in place using water-blown technology, without CFCs, HCFCs, or ozone-depleting chemicals. Unlike traditional fiberglass insulation, Sealection 500 will maintain its performance; time and temperature have no effect on the spray foam insulation's R-value of 3.81 at 1 inch. Sealection 500 never deteriorates or decomposes. The product retains its shape and half-pound density over time, and never settles or compacts. http://youtube.com/v/ggLAUsiuI_o
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