this video is brought to you by squarespace from websites and online stores to marketing tools and analytics squarespace is the all-in-one platform to build your online presence in my last video we discussed the differences between open and closed cell polyurethane spray foam their chemical compositions physical properties and performance today we're going to cover the pros and cons of both types of spray form i'm going to incorporate your feedback and answer your questions from the previous video i'll also discuss the one thing that absolutely terrifies me about this product let's start with the advantages of spray foam r value our value is the measure of resistance to the flow of heat open cell foam has a good r value of NUMBER_TOKEN per inch but closed cell foam has an excellent r value of NUMBER_TOKEN per inch however the r value test ignores the air sealing properties of spray foam it positively impacts all three forms of heat transfer conduction convection and radiation spray foam is a high performance insulation product that is superior to traditional insulation air sealing one to one and a half inches of closed cell foam can act as an air barrier while three to three and a half inches of open cell spray foam acts as an air barrier when applied properly it can improve the air quality in a building it creates an air tight structure that keeps moisture allergens and other airborne contaminants out it can seal all gaps even in awkward areas and hard to reach places spray foam can stop uncontrolled air leakage which is the main source of energy loss energy savings it can lower utility bills in your home by keeping conditioned air inside it is estimated to reduce heating and cooling costs by up to NUMBER_TOKEN percent it has been called green or environmentally friendly because it reduces energy consumption greenhouse gas emissions and the hvac requirements of buildings close cell form closed cell foam is impermeable to water it can protect attics and crawl spaces from moisture it can reinforce exterior walls and increase overall structural integrity of the wall assembly it makes them more rigid and more resistant to compression and shearing forces it can increase racking strength by up to NUMBER_TOKEN percent close cell phone is good in areas prone to severe weather like flooding storm surges and high winds lifespan spray foam has a long lifespan of up to NUMBER_TOKEN years it has a lower thermal drift or loss of r value over time than traditional insulation it does not sag settle or deteriorate and is expected to outlast the life of a building it is also not a source of food for pests rodents mold mildew and bacteria evolution the spray foam industry is constantly evolving because it is under unrelenting scrutiny it used to be made with greenhouse gases that contributed to the depletion of our ozone layer gases like cfcs or chlorofluorocarbons and hcfcs are hydrochlorofluorocarbons fortunately those are not used anymore open cell foam uses water as a blowing agent while closed cell foam uses a chemical with a very low global warming potential of just one before we move on to the disadvantages of spray foam i'd like to share a little project i've been working on many people have asked me to share my scripts so that they can refer to them in essays and other projects so i'm building a website called URL_TOKEN to post all my building science content i've decided to use squarespace because of its easy customizable templates they can support pages galleries blogs commerce and more i can easily add and manage text photos videos and comments check out URL_TOKEN for a free trial and
START_SPONSOR_TOKEN this video is brought to you by squarespace from websites and online stores to marketing tools and analytics squarespace is the all-in-one platform to build your online presence in END_SPONSOR_TOKEN BETWEEN_SEGMENTS_TOKEN START_SPONSOR_TOKEN i've decided to use squarespace because of its easy customizable templates they can support pages galleries blogs commerce and more i can easily add and manage text photos videos and comments check out URL_TOKEN for a free trial and END_SPONSOR_TOKEN