The problem you saw with the closed cell foam pulling away like that is due to the heat of the foam was to hot. It was actually curing out and making foam before it could adhere to the wood. The installer wasn't reading his foam correctly. He should of stopped and turned down the heat on his hose temp. Also installers have to be aware that as the sun rises and the temp in attics rises the subtrates get hotter as well. This will cause the installer to adjust his heat when installing the foam as the temp changes thru out the day. Spray Coating Services
You've got no argument from me there, Dennis. Getting a good installer if you're going with spray foam is crucial. Many builders or homeowners don't know how to find one, however, and that's where third party inspections come in. Also, even good installers have bad days, but if someone comes in behind them with a measuring probe and a Blower Door, there will be fewer sub-par foam jobs.
Due to a wide range of nozzle shapes and sizes, the consistency of the paint can be varied. The shape of the workpiece and the desired paint consistency and pattern are important factors when choosing a nozzle. The three most common nozzles are the full cone, hollow cone, and flat stream. There are two types of air-gun spraying processes. In a manual operation method the air-gun sprayer is held by a skilled operator, about 6 to 10 inches (15–25 cm) from the object, and moved back and forth over the surface, each stroke overlapping the previous to ensure a continuous coat. In an automatic process the gun head is attached to a mounting block and delivers the stream of paint from that position. The object being painted is usually placed on rollers or a turntable to ensure overall equal coverage of all sides. Coating Services
HVOF coatings may be as thick as 12 mm (1/2"). It is typically used to deposit wear and corrosion resistant coatings on materials, such as ceramic and metallic layers. Common powders include WC-Co, chromium carbide, MCrAlY, and alumina. The process has been most successful for depositing cermet materials (WC–Co, etc.) and other corrosion-resistant alloys (stainless steels, nickel-based alloys, aluminium, hydroxyapatite for medical implants, etc.).
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. Spray Coating Services
This stuff works perfectly! We'll see how long it holds up on my nicely prepped paint on my black 1996 Jeep Cherokee. I first hand washed it, then used Meguiars Clay Bar kit on it, then compounded it using Meguiars Ultimate Compound, then polished it using Meguiars polish, then used wax and grease remover to remove any oily residue from the previous steps, then applied the Mother's CMX using a microfiber foam hand applicator to spread one spray at a time evenly across the paint... Let it sit for a few minutes to bond with the paint surface, then used a really soft microfiber towel that came with my clay bar kit to buff off the dried powder residue to a perfect shine!! It wiped off very easily and then let it sit to cure for 24 hours without getting wet... It looks flawless on my fresh black paint! And water falls right off of it like all the other great brand ceramic coatings!! Highly recommend it especially for the price and the big bottle... This stuff has a very strong smell to it (must be good!), and is completely white like milk inside it if you unscrew the cap and have a look at it... I'm very satisfied, this was my first time ever using a ceramic coating before and it worked exactly how they claimed and advertised in their video Ads on FACEBOOK Coating Services
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.
The criterion for whether your crawl space or attic is occupied is often the size of the entrance. Entry to the crawl space or attic should be a small hatch or door, not a normal-sized door. Additionally, if you cannot get to whatever area you are insulating without cutting through a drywall layer, then you do not need to use an ignition barrier, because the drywall already serves the purpose of the thermal barrier. Spray Coating
Car was washed with Carpro reset and wiped down with Griots garage paint prep to ensure a clean surface for first application of CMX. Week one CMX had a nice gloss with small tight beads after getting rained on (typical Si02 protection). Week two the beads were large and flat (low contact angle) so product was on it's way out. Week three the water was sheeting with no beading at all. That's complete failure in three weeks. Also I didn't like the white crystals that developed in the bottle. I'm concerned that if I used the product again that I'd mar my Audi's Mythos black paint. My car is parked outside driven only about 50 miles per week and is washed weekly with Megs gold class car wash. . Won't apply it again. Moving on....
One of the most common applications we handle is the production of custom pressure sensitive adhesive tapes. We also process specialty coatings with job-specific characteristics, such as anti-fog coatings, laminating tapes, fabric appliques, and more. Custom coating formulations are also available to meet the unique requirements of virtually any application.
These are robust production capabilities, which allow us to consistently and reliably meet a broad range of coating requirements. Our technical managers ensure the substrate and coating are compatible and are the best possible materials for the job. We engineer our process to deliver a uniform coating in a precise layer from .001” to .005” in thickness. Insulation Spray Coating
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
This technique is mostly used to produce coatings on structural materials. Such coatings provide protection against high temperatures (for example thermal barrier coatings for exhaust heat management), corrosion, erosion, wear; they can also change the appearance, electrical or tribological properties of the surface, replace worn material, etc. When sprayed on substrates of various shapes and removed, free-standing parts in the form of plates, tubes, shells, etc. can be produced. It can also be used for powder processing (spheroidization, homogenization, modification of chemistry, etc.). In this case, the substrate for deposition is absent and the particles solidify during flight or in a controlled environment (e.g., water). This technique with variation may also be used to create porous structures, suitable for bone ingrowth, as a coating for medical implants. A polymer dispersion aerosol can be injected into the plasma discharge in order to create a grafting of this polymer on to a substrate surface. This application is mainly used to modify the surface chemistry of polymers. Coating Services
Building code uses two different terms to describe barriers that protect insulation and prevent them from catching fire. The first is called a thermal barrier, which is a poorly chosen word. Typically, scientists and builders refer to insulation as a thermal barrier. Most people would think of a thermal barrier as something that keeps heat in. However, in building code, thermal barrier essentially refers to 1/2-inch drywall, though the definition can get more complicated than that.
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.
Like HVLP, low volume low pressure (LVLP) spray guns also operate at a lower pressure (LP), but they use a low volume (LV) of air when compared to conventional and HVLP equipment. This is a further effort at increasing the transfer efficiency (amount of coating that ends up on the target surface) of spray guns, while decreasing the amount of compressed air consumption. Insulation Spray Coating
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.)
What do you mean by "our AC units require fresh air ventilation"? Fresh air doesn't come from the attic. If there's an atmospheric combustion appliance in the attic, such as an 80 AFUE furnace, then you shouldn't be encapsulating the attic anyway. If that's the case, you don't want spray foam on the roofline at all. You can either change out the furnace to a sealed combustion unit or do your insulating and air-sealing at the flat-ceiling level. Insulation Spray Coating
During the 1980s, a class of thermal spray processes called high velocity oxy-fuel spraying was developed. A mixture of gaseous or liquid fuel and oxygen is fed into a combustion chamber, where they are ignited and combusted continuously. The resultant hot gas at a pressure close to 1 MPa emanates through a converging–diverging nozzle and travels through a straight section. The fuels can be gases (hydrogen, methane, propane, propylene, acetylene, natural gas, etc.) or liquids (kerosene, etc.). The jet velocity at the exit of the barrel (>1000 m/s) exceeds the speed of sound. A powder feed stock is injected into the gas stream, which accelerates the powder up to 800 m/s. The stream of hot gas and powder is directed towards the surface to be coated. The powder partially melts in the stream, and deposits upon the substrate. The resulting coating has low porosity and high bond strength. Spray Coating