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Old 02-26-2011, 10:39 AM   #1
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Is it worth insulating the garage to help keep the bedroom warm?


The back wall of my daughters bedroom is a canteliver design were it overhangs the cement garage floor by about 1.5 feet. This 1.5 foot area of the floor is at least 7-9 degrees colder than the rest of the floor in her room.

We have done everthing we can with insulating the 8in high canteliver area...foam seal joints, batts, foam board then new drywall. We also sealed all the rim joists, new batts and conditioned the crawl space which is below her bedrooms. All of this was done by a pro-company.

So...the question is, will insulating the garage help warm her bedroom? I am thinking nothing fancy, seal any gaps with Hilti canned spray foam, put batts in the walls and cover them with some type of particle board and paint them white. For the ceiling I am not sure...it's valuted but there is a wood stud ceiling that I could attach some thick foam board or I guess drywall and then put up batts above the drywall but I think that may be challenging.

Any thoughts?

Thanks!

Mitch

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Old 02-26-2011, 12:53 PM   #2
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Is it worth insulating the garage to help keep the bedroom warm?


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Originally Posted by mitchel View Post
The back wall of my daughters bedroom is a canteliver design were it overhangs the cement garage floor by about 1.5 feet. This 1.5 foot area of the floor is at least 7-9 degrees colder than the rest of the floor in her room.

We have done everthing we can with insulating the 8in high canteliver area...foam seal joints, batts, foam board then new drywall. We also sealed all the rim joists, new batts and conditioned the crawl space which is below her bedrooms. All of this was done by a pro-company.

So...the question is, will insulating the garage help warm her bedroom? I am thinking nothing fancy, seal any gaps with Hilti canned spray foam, put batts in the walls and cover them with some type of particle board and paint them white. For the ceiling I am not sure...it's valuted but there is a wood stud ceiling that I could attach some thick foam board or I guess drywall and then put up batts above the drywall but I think that may be challenging.

Any thoughts?

Thanks!

Mitch
The garage ceiling and the cantilevered part of the bedroom floor should be insulated. The most effective insulation for this area is closed cell foam.
Ron

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Old 02-26-2011, 02:16 PM   #3
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Is it worth insulating the garage to help keep the bedroom warm?


Our Living room is above our garage, which has something like r16 (?) batts but not very good air sealing. The LR is very cold... uncomfortable to hang out in really in the winter. Even when we crank the heat, it is just dry and hot and drafty... how much of a difference will closed cell foam make with our comfort?
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Old 02-26-2011, 02:32 PM   #4
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Is it worth insulating the garage to help keep the bedroom warm?


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Originally Posted by pcampbell View Post
Our Living room is above our garage, which has something like r16 (?) batts but not very good air sealing. The LR is very cold... uncomfortable to hang out in really in the winter. Even when we crank the heat, it is just dry and hot and drafty... how much of a difference will closed cell foam make with our comfort?
Closed cell will make a big difference.
So the bedroom extends into the garage by 1 1/2'. I'd use the same closed cell in the floor and wall.
The pricepoint will be higher then fiberglass.
Ron
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Old 02-26-2011, 08:56 PM   #5
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Is it worth insulating the garage to help keep the bedroom warm?


I would install at least 3 inches of closed cell insulation over the whole garage ceiling and cover this with drywall.
Closed cell insulation is flamable and must be covered with drywall.
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Old 02-26-2011, 09:00 PM   #6
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Is it worth insulating the garage to help keep the bedroom warm?


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Originally Posted by mitchel View Post
The back wall of my daughters bedroom is a canteliver design were it overhangs the cement garage floor by about 1.5 feet. This 1.5 foot area of the floor is at least 7-9 degrees colder than the rest of the floor in her room.

We have done everthing we can with insulating the 8in high canteliver area...foam seal joints, batts, foam board then new drywall. We also sealed all the rim joists, new batts and conditioned the crawl space which is below her bedrooms. All of this was done by a pro-company.

So...the question is, will insulating the garage help warm her bedroom? I am thinking nothing fancy, seal any gaps with Hilti canned spray foam, put batts in the walls and cover them with some type of particle board and paint them white. For the ceiling I am not sure...it's valuted but there is a wood stud ceiling that I could attach some thick foam board or I guess drywall and then put up batts above the drywall but I think that may be challenging.

Any thoughts?

Thanks!

Mitch
I have a similar problem with my master bedroom but it'll take care of itself

once my basement is heated and I just picked up a garage furnace to

install for next winter also( garage already insulated ).

I'm always averaging 1.5f to 2f colder in that room with only one interior

wall and 3 exterior ( including garage wall ).

The end of the forced air furnace run doesn't help either.

I wonder if a small baseboard heater on the cold wall may do the trick.
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Old 02-26-2011, 10:31 PM   #7
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Is it worth insulating the garage to help keep the bedroom warm?


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I wonder if a small baseboard heater on the cold wall may do the trick.
You can spend the money to keep the heat in the house or you can spend the money to produce more heat.
I would rather spend the money now to insulate. It's a one time cost and it's fixed.
The cost to add more heat will constantly go up, year after year.
Ron
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Old 02-27-2011, 12:11 AM   #8
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Is it worth insulating the garage to help keep the bedroom warm?


I agree to add more/better insulation, in my situation I planned on

eventually heating the garage and basement somewhat anyways ( as I

plan on using both more in the winter ).

My insulated and fairly air tight attached garage seems to average 15f -20f

warmer than outside temps ( heat loss from the house and car engine heat

) ,so it does help some.

Insulating the garage/bedroom wall would yield the biggest bang for your

buck , insulating and rocking the garage not nearly as much.

Anyways just throwing another option out there , I've seen gas and

electric in-wall fireplaces in bedrooms but there mostly for ambience,

after insulating the bedroom/garage wall a lower wattage baseboard heater

( if needed ) would be my 2nd step with an insulated garage #3.
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Old 02-27-2011, 08:32 AM   #9
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Is it worth insulating the garage to help keep the bedroom warm?


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Originally Posted by Ron6519 View Post
Closed cell will make a big difference.
So the bedroom extends into the garage by 1 1/2'. I'd use the same closed cell in the floor and wall.
The pricepoint will be higher then fiberglass.
Ron
Ron...when you say closed cell, is that the two-part spray stuff that pros use or is that something I can buy at a Big Box store like Hilti products? I can't think it's more than maybe 10 cu.ft. so I would think it's not too expensive?

So it sounds like I should remove all the batt insulation from the cantilever area and spray this stuff everywhere in these to form one huge block of foam?

Thanks for taking the time to help with this.

Mitch
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Old 02-27-2011, 08:53 AM   #10
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Is it worth insulating the garage to help keep the bedroom warm?


Quote:
Originally Posted by mitchel View Post
Ron...when you say closed cell, is that the two-part spray stuff that pros use or is that something I can buy at a Big Box store like Hilti products? I can't think it's more than maybe 10 cu.ft. so I would think it's not too expensive?

So it sounds like I should remove all the batt insulation from the cantilever area and spray this stuff everywhere in these to form one huge block of foam?

Thanks for taking the time to help with this.

Mitch
Looks like this:

Do a search online and you'll see the variations and sizes.
Ron
No, not like a red "X in a box. Seems the pictures a little shy.
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Old 02-27-2011, 09:04 AM   #11
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Is it worth insulating the garage to help keep the bedroom warm?


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Originally Posted by Ron6519 View Post
Looks like this:

Do a search online and you'll see the variations and sizes.
Ron
No, not like a red "X in a box. Seems the pictures a little shy.
Thanks!

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