Spray foam insulation question

[Whywalk]

From everything I’ve read, closed cell spray foam insulation is the best choice for R value, and I’m leaning heavily toward using it on my ceiling in my skoolie.
In the demonstration videos I’ve watched, it’s touted because, when applied, it expands and fills ALL gaps within/between two surfaces. Cool.
But on skoolie photos I’ve seen that have been sprayed, the (finished) ceiling is NOT installed, and the foam is NOT smooth...so, when the ceiling IS installed after, the foam underneath would, because of the foam’s uneven surface, have gaps/air pockets, right?

Doesn’t that defeat the purpose of using the foam in the first place?

 

[Brewerbob]

There's a YouTuber guy in NV that sprayed floor, wall, and ceiling with foam. Check out his videos.

There may be gaps between your insulation and the ceiling. Overspray and trim if you're really worried about it. But as long as your aren't mounting your ceiling directly to the ribs, there won't be thermal bridging. And for the record "air gaps" ARE the insulation. Whether it be batting or open/closed cells, you are trapping tiny air pockets on purpose. Bigger pockets will give you less of an R value but it won't kill you. Those bigger pockets are inside and filled with heated/cooled air. The insulation will isolate those pockets from the outside temps.

Number 17 is the foam video but he does a good job thru-out.

https://www.youtube.com/watch?v=AkiNmEkD6C4&list=PLrd6RxhVKNHs6e-bUGD0lMTILWvcmU-Ae

 

[Brewerbob]

 

[Brewerbob]

And video #20

 

[Twigg-SKO]

Ahh ... dzlfreak ...

Watch all of his videos

 

[Brewerbob]

Yep. Never met or spoke with the guy but he's ok in my book. He answers a lot of the comments which is always a plus (but rarely done) with people trying for a public presence. Doesn't hurt that he's down to earth, into guns, and not from Jersey.

 

[Whywalk]

Thank you for sharing your knowledge and these videos! Answered my questions

 

[Brewerbob]

Thank you for sharing your knowledge and these videos! Answered my questions

Sweet, that's why we are here.

There's another thread I was in just this morning as well about "crushing rigid board" without framing. Qin't going to happen but I'm framing anyway since the spray foam won't be level especially if I do it myself.

 

[weboughtabus]

Doesn't hurt that he's down to earth, into guns, and not from Jersey.

Hey man, there's nothing inherently wrong with New Jersey or its residents. I'll concede that there are some remarkably bad humans from New Jersey but, like any other place, there are also lots of good people.

 

[Twigg-SKO]

Sweet, that's why we are here.

There's another thread I was in just this morning as well about "crushing rigid board" without framing. Qin't going to happen but I'm framing anyway since the spray foam won't be level especially if I do it myself.

Nuttin' wrong with framing.

My only intent is that folk can make their own decision based on all the info we can give them.

 

[Brewerbob]

Hey man, there's nothing inherently wrong with New Jersey or its residents. I'll concede that there are some remarkably bad humans from New Jersey but, like any other place, there are also lots of good people.

I've never heard of a North Dakota princess. I have heard of a Jersey princess. It's only a stereotype if it's true. There is nothing inherently wrong with prisons or the inmates. There are a couple of guys that are ok. The concentration of a$$holes goes up significantly on the other side of the bars tho. Much the same when crossing the Jersey state line.

I work with a bunch of Jersey transplants. Some of them are ok. So, no the rule is not absolute but very few rules are. Maybe if they raise the cost of the border crossing, more of them would stay home. $2 or $3 million per crossing ought to do it. Maybe then they could build roads that don't suck and with left turns.

 

[Brewerbob]

Hey man, there's nothing inherently wrong with New Jersey or its residents. I'll concede that there are some remarkably bad humans from New Jersey but, like any other place, there are also lots of good people.

P.S. Mostly busting your balls tho you will never catch me living there. Property taxes are way too high, property values are way too high, landfill for NYC, can smell it before you see it crossing whatever NYC bridge that is, beaches don't go further north than Jacksonville FL, there's Camden, anti gun, ... the list is long and various.

 

[weboughtabus]

P.S. Mostly busting your balls tho you will never catch me living there. Property taxes are way too high, property values are way too high, landfill for NYC, can smell it before you see it crossing whatever NYC bridge that is, beaches don't go further north than Jacksonville FL, there's Camden, anti gun, ... the list is long and various.

I still have no idea how New Jersey has this reputation of stench while everyone raves about New York City which REEKS of human waste. I guess the problem is that everyone judges it based on the Parkway and the Turnpike instead of the actual merits of the state.

 

[BusWhackers]

Still air is actually a great insulator (as long as the environment is sealed and no drafts can move the air)

https://sustainabilityworkshop.autodesk.com/buildings/insulation

 

[Brewerbob]

Webought,
I have no love for NYC either. It's alright for a visit but no desire to live there. I don't remember it stinking tho. I do remember driving across whatever that bridge is and smelling Jersey before getting to it. No idea if it was wind, an extra ripe load recently, etc. but it was pretty nasty.

 

[brokedown-SKO]

Everything I know about NJ I learned from my GF watching Jersey Shore and various articles about Bon Jovi https://nypost.com/2011/12/20/bon-jovi-heaven-looks-a-lot-like-new-jersey/

I'm not sure if they quite cancel each other out!

 

[Life And Stuff]

I still have no idea how New Jersey has this reputation of stench while everyone raves about New York City which REEKS of human waste. I guess the problem is that everyone judges it based on the Parkway and the Turnpike instead of the actual merits of the state.

It is an old stereotype which comes from the volume of oil refineries in the northern part of the state, the high crime rate in places like Newark, and the number of landfills.
Back in the day, people moved out of New York city to somewhere cheaper. North of NYC was becoming even more expensive than the city, so people moved South to New Jersey, where you could live cheaper while still working in NYC. The people who remained in NYC continued to work hard and pay more for everything from rent and utilities to food and clothing.
The NYC people, probably from a combination of resentment that the New Jersey people were living for less and New York pride, began to make fun of their friends who moved.
This friendly ribbing has evolved over the generations, as things do, leading to New Jerseys "bad" reputation and that of the people who live there.
Shows like "Jersey Shore" don't help any.

 

[o1marc]

Not all of Jersey is smelly and trashy, Fly over the state you will know why the call it The Garden State, much of the state is huge fields of colorful flowers.

 

[Life And Stuff]

Not all of Jersey is smelly and trashy, Fly over the state you will know why the call it The Garden State, much of the state is huge fields of colorful flowers.

Yes, it is quite beautiful outside of the cities.

 

[o1marc]

Yes, it is quite beautiful outside of the cities.

Are you from Jersey, what exit? If you go to the UserCP you can fill out your profile so we can better assist you in your questions.