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?

We carry a full line-up of the best roof coatings and roof waterproofing products - all tested in extreme climates. Our lines include both high-performance and cost-effective solutions. RoofMate HT is a high performance Elastomeric Roof Sealant for light traffic areas. Lucas 6000 universal is a superior high performance top coating. SilverWhite aluminized metal roof coating for metal roofs helps prevent rust. Roof Mate from United Coating has formulas for all type of roofs and  warranties available for up to 15 years. NovaTuff 2-part flexible epoxy systems are top-of-the-line waterproofing grade roof coatings with extremen chemical and salt resistance. For a cost effective quality foam roof recoat, we recommend UltraShield acrylic elastomeric roof coating. UltraShield is available in popular earth-tone colors and in 55G drums.

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Some states, municipalities and utilities have programs. Check with your coatings manufacturer for further information. As a membership benefit, RCMA provides maintains a database of current information on rebates and tax credits for installing reflective roofs. RCMA’s customized search tool can be used to find the most up-to-date listings of reflective roofing financial incentives available.

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I am building a house in Central Texas (Caldwell). Several builders are cautious about using foam insulation and/or a closed attic. I would like to use both. Here in Texas, heat and humidity (except for the past few years of drought) are a continuing problem. Which type of foam would be the best to use in our home, where should the vapor barrier be or should be use one at all, if we are using fans in the exterior walls to supply fresh air to the house, do we need a vented attic or will it cause more problems than it solve? I have printed out your article and the blogs to give to my contractors and architect, but I would really appreciate your comments on the products being used in my part of the US. 


Current guidelines recommend up to 10 inches of insulation in your attic . This is usually added to the ground, rather than the roof line, which results in the loss of your storage area, due to not being able to refit floor boards after installation. By implementing spray foam insulation to the roof line, you regain the lost 10 inches, thus increasing storage, height and practicality.
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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Allison--would be very interested in your take on the GHG issues of foams, which have received lots of smart commentary recently. To highlight a few: architect Jesse Thompson's comments on Tom's Good vs Bad post on Energy Circle, the very thorough piece by Alex Wilson on Green Building Advisor and Michael Anschel's cautionary diatribe on Remodeling. 

We live in middle TN and had our house foamed last year. We noticed recently that some of the foam was shrinking and seperating from the floor joists. We contacted the installer and he informed us that the manufacturer had a problem with a batch of foam during the time frame we had our house sprayed. The contractor wasn't sure if we had the recalled batch installed in our house or not. He said he would check the batch numbers and let us know. He seems like a nice guy promising to do whatever it takes to fix any problems. Do we trust him, however, to be truthful about the batch number? Do we have any options for finding out the information ourselves? I inspected the entire crawl space of the house and noticed approximately (5) areas that were seperating and a couple areas where the foam didn't adhere to the block. Do I assume by it being so infrequent that it is nothing to be concerned about? My concern is the walls that are not capable of being visually inspected because of sheetrock.

Porch urns are an excellent way to add seasonal curbside flair. However, tall items such as twigs, birch stems or even pumpkins can sway in the breeze and make a mess of your carefully planned decor. To prevent things from shifting, place your items in the container and spray around them with expanding foam to create a comfy nest that will keep your urns looking great. Place a layer of moss, hay or greenery on top to finish the look.

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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.

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Spray foam is a very specialized packing material, often required for use in shipping valuable fragile items. Engineered packaging principles are designed to protect sculptures, vases, large fossils, lamp bases, busts, computers, furniture, chandeliers and other objects of unusual shape. By virtue of the liquid foam expanding by up to 30-60 times the volume of its liquid state, it efficiently protects almost any size, form and weight. 

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Thoroughly clean the roof surface. Roofs collect oils from asphalt, chimneys, and cars plus lots of dirt and dust. Coatings don’t stick well to any of these. We recommend cleaning with an inexpensive solution of TSP or TSP Substitute in a bucket of water (follow label instructions). Use a broom to scrub ponding areas and areas of peeling coatings. Work a section at a time and hose off the dirty water. Sweep away puddles to promote drying. Do not allow wash water to dry on walls, furniture, windows, and visible surfaces. 
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 http://youtu.be/ggLAUsiuI_o
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