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Started By
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Anyone here have their entire house spray foamed?
Posted on 4/13/18 at 2:05 pm
Posted on 4/13/18 at 2:05 pm
If so, what are your thought? I’m building a house and trying to decide which way to go.
Posted on 4/13/18 at 2:13 pm to Jack Daniel
I do. Built in 2007, when spray was just getting big. Raised home. You have to plan it from the beginning and if you use gas, you need to bring in fresh air. We have a 2 stage 21 sear HVAC system. We have be pleased but in hindsight, we would probably have been ok using cellulose in the walls on the north and east elevations and saved a large amount on insulation cost for the build.
Posted on 4/13/18 at 2:14 pm to Jack Daniel
I just built a home and decided against it. Just got the highest r value I could get and have no problems. There are just too many risks when you spray. If its not done correctly it will emit a smelly gas in your home. Also need to have an engineer to look at the plans to see what kind on ventilation you will need and the right size ac unit.
Posted on 4/13/18 at 2:21 pm to Jack Daniel
we built in 2006 and spray foamed all exterior walls. Heard a bunch of conflicting opinions about doing this in the attic. House needs to breathe and all that stuff... who knows. Very happy with the spray in wall insulation.
Posted on 4/13/18 at 2:29 pm to Jack Daniel
We just bought a new construction house. I specifically asked the builder about why they chose not to do spray in foam. He said that he did it on his own home but would not put it in if he could do it again. He didn't like how tight it made the house and said that the energy savings was minimal if at all.
Posted on 4/13/18 at 2:35 pm to Drunken Crawfish
quote:
He didn't like how tight it made the house
What do you mean?
Posted on 4/13/18 at 2:45 pm to meeple
quote:
What do you mean?
No air movement in/out of the house is supposedly not healthy. Air doesn't change over because the house is not breathing. There are a lot of recommendations for spray foam homes to incorporate some kind of air exchanger into the system. Supposed to pull in 5% to 10% fresh air from outside while the AC is running. Something to this effect.
Tight houses don't breathe which can lead to moisture issues. Lots of opinions on whether or not this is truly a problem...
This post was edited on 4/13/18 at 2:46 pm
Posted on 4/13/18 at 2:47 pm to meeple
Those were his words, not mine I don't know much about insulation. Apparently if a house is too tight it can affect air quality inside. He said that it can restrict fresh air from the outside from coming in if your house is too "tight". He got tired of having to run his bathroom vents or kitchen hood while he was at work.
Can spray foam make my house too tight?
Can spray foam make my house too tight?
Posted on 4/13/18 at 2:49 pm to Tridentds
moisture in attic can quickly mold with lack of air etc
Posted on 4/13/18 at 2:59 pm to Drunken Crawfish
I have 2 air handlers, one is under my house. I have a 12"x12" air return outside the home. This provides fresh air into the home.
Posted on 4/13/18 at 3:11 pm to wickowick
I used spray foam in my walls. Big time energy savings when compared to the other houses in my neighborhood that didn't. I've been happy with it. If I could do it again I'd spray the roof decking as well and insulate the attic space. More energy savings by having your HVAC in a semi conditioned space.
Lots of conflicting opinions by contractors or HVAC folks, mainly by people who are uninformed in my experience. As others mentioned you need to re-size your HVAC and bring in an air exchange but worth it you can find someone who knows what they are doing.
Lots of conflicting opinions by contractors or HVAC folks, mainly by people who are uninformed in my experience. As others mentioned you need to re-size your HVAC and bring in an air exchange but worth it you can find someone who knows what they are doing.
Posted on 4/13/18 at 6:13 pm to GoldenSombrero
I know someone who did it. They have a leak at a window...that is not from the window. It’s coming in someplace and running behind the foam somehow and everyone (window, framer, roofer) is blaming the other. They have replaced windows and par of the wall and still leaks. Not sure if they ever figured it out.
Then I saw a story online of someone who had it emit a bad smell. It was just in the attic I think. They had to cut the entire roof off between the rafters to get it out.
Those 2 things made me run...fast.
Then I saw a story online of someone who had it emit a bad smell. It was just in the attic I think. They had to cut the entire roof off between the rafters to get it out.
Those 2 things made me run...fast.
Posted on 4/13/18 at 6:16 pm to NOLAGT
I bet the window issue is the result of condensation
Posted on 4/13/18 at 8:08 pm to wickowick
My mom had a problem w a door frame when the alarm installer drilled through the frame from attic running contact wires. That made it condensate moisture through the hole.
Posted on 4/13/18 at 8:23 pm to GoldenSombrero
I used spray foam in the exterior walls only. Traditional blown fiberglass in the attic and fiberglass batt in the interior walls/garage/etc.
With the gas appliances and attic ventilation concerns, this was the best route IMO.
With the gas appliances and attic ventilation concerns, this was the best route IMO.
Posted on 4/13/18 at 8:25 pm to wickowick
No idea. Pretty sure it would leak when when it rained. Reguardless I thought about that layer of foam and how there could be channels for water to run from one side of the roof to another. That would make it just about impossible to easily see where from. Love the concept and thought about doing it but my luck I would have had issues.
This post was edited on 4/13/18 at 8:26 pm
Posted on 4/13/18 at 8:54 pm to Tridentds
quote:
Tight houses don't breathe which can lead to moisture issues. Lots of opinions on whether or not this is truly a problem.
My house is tight and I have a problem getting a draft going when we build a fire in the winter. Either have to crack a window or leave the fire going off of gas only for about 20 minutes. otherwise itll smoke up the whole house.
Posted on 4/13/18 at 9:45 pm to Jack Daniel
Matt Risinger on YouTube has fantastic videos on spray foam and air quality. Guy is sharp
Posted on 4/13/18 at 10:24 pm to Man4others
Ive watched his videos. He is adamant about spray foaming the roof and how much it makes the house efficient with the AC unit being within an insulated area.
Posted on 4/14/18 at 5:31 am to SportTiger1
Same problem with my house. I have rockwool insulation. When I built my house 20 years ago, I insulated extras were insulation doesn't get done.
Only the guest house I am building, I will have foam sprayed under the floors. 10x better then batts due to animals or bugs getting into the insulation. The house has a 2' clearance under.
Only the guest house I am building, I will have foam sprayed under the floors. 10x better then batts due to animals or bugs getting into the insulation. The house has a 2' clearance under.
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