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  1. #1
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    Basement temperature

    I have a finished basement with no insulation. I gotten various opinions claiming none is needed since it must have been insulated from the outside. I'm not sure what to think of this and I'm wondering what the temperature will be like this winter. I hope I won't have to crank the heat constantly down there.

    Right now it's a steady 70 degrees in the basement with all the AC vents closed.The upstairs reads around 75. Anyone currently living in a similar environment? If so, what temperature does your basement get (in Ames) around the winter time?

    thanks



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    Re: Basement temperature

    Its really hard to say. Is it completely under ground, walkout, daylight? Just finished my basement, heavily insulated the walls and ceiling for sound, but not the floors, so Prob wont be all that different imo. Will just have up open up the vents to get some heat down there.


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    Re: Basement temperature

    My basement is finished minus paint and carpet (slowly but surely) and it is always around 3-5 lower than main level. I have a 2 story, and it gets warmer as you go up, 2nd story is 3-5 warmer than the main level. Hope it helps. I also have all vents closed in my basement. I am sure if I opened them in the winter, it would help, but honestly, I like it cool.

    Edit:

    Oh yeah, walls are insulated w/fiberglass batting, ceiling is not.



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    Re: Basement temperature

    Insulation only improves.



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    Re: Basement temperature

    Ours is completely underground. It's "chilly" year round - probably about 70 and less humid right now with no vents open and the main level set at 78. I'd guess the temperature difference is the same in the winter when we keep the house at 68 and all vents open.


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    Re: Basement temperature

    Quote Originally Posted by ripvdub View Post
    Its really hard to say. Is it completely under ground, walkout, daylight? Just finished my basement, heavily insulated the walls and ceiling for sound, but not the floors, so Prob wont be all that different imo. Will just have up open up the vents to get some heat down there.
    Completely underground with poured concrete walls. The ceiling is insulated for sound.

    I know a majority of your heat loss comes from the above ground level of your house but I'm just wondering if I'll be losing a lot of heat down there if the insulation isn't adequate. One contractor told me (without looking at my basement) to expect a 10 degree difference come this winter.



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    Re: Basement temperature

    Quote Originally Posted by titleist View Post
    I have a finished basement with no insulation. I gotten various opinions claiming none is needed since it must have been insulated from the outside. I'm not sure what to think of this and I'm wondering what the temperature will be like this winter. I hope I won't have to crank the heat constantly down there.

    Right now it's a steady 70 degrees in the basement with all the AC vents closed.The upstairs reads around 75. Anyone currently living in a similar environment? If so, what temperature does your basement get (in Ames) around the winter time?

    thanks
    It really just depends on how much time you are going to spend in the basement in the winter. Your finished areas should atleast have insulated walls on the exterior walls. Your foundation walls are going to cool that down more than you think. My brother in law and sister have a basment that they have carpet in, and a living room set up but the walls aren't framed in yet. That basement gets pretty cold in the winter. They are planning on framing in the basement this fall and will insulate all exterior walls. You will probably check into getting it done, you won't like your heat bill if you are down there a lot.


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    Re: Basement temperature

    Quote Originally Posted by titleist View Post
    I have a finished basement with no insulation. I gotten various opinions claiming none is needed since it must have been insulated from the outside. I'm not sure what to think of this and I'm wondering what the temperature will be like this winter. I hope I won't have to crank the heat constantly down there.

    Right now it's a steady 70 degrees in the basement with all the AC vents closed.The upstairs reads around 75. Anyone currently living in a similar environment? If so, what temperature does your basement get (in Ames) around the winter time?

    thanks
    enjoy the cool during the summer and buy some blankets or a nice ISU sweat suit for the winter.



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    Re: Basement temperature

    Quote Originally Posted by titleist View Post
    I have a finished basement with no insulation. I gotten various opinions claiming none is needed since it must have been insulated from the outside. I'm not sure what to think of this and I'm wondering what the temperature will be like this winter. I hope I won't have to crank the heat constantly down there.

    Right now it's a steady 70 degrees in the basement with all the AC vents closed.The upstairs reads around 75. Anyone currently living in a similar environment? If so, what temperature does your basement get (in Ames) around the winter time?

    thanks
    You will get residual heating in the basement from the furnace.

    Do you run a dehumidifier in the basement during the summer?



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    Re: Basement temperature

    Quote Originally Posted by leroycyclone View Post
    You will get residual heating in the basement from the furnace.

    Do you run a dehumidifier in the basement during the summer?
    I do run a dehumidifier. The reason I ask about temps now is because we are going to be doing some remodeling down there soon for the bathroom. Just wondering if there is something quick and easy to do now before the fall temps approach and before we move some furniture in.

    I've read a little about cutting a strip of drywall at the top and blowing in some type of material down the wells. No idea how messy or complicated this process really is..


    Last edited by titleist; 07-09-2012 at 08:11 AM.

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    Re: Basement temperature

    Quote Originally Posted by titleist View Post
    I do run a dehumidifier. The reason I ask about temps now is because we are going to be doing some remodeling down there soon for the bathroom. Just wondering if there is something quick and easy to do now before the fall temps approach and before we move some furniture in.

    I've read a little about cutting a strip of drywall at the top and blowing in some type of material down the wells. No idea how messy or complicated this process really is..

    I just used foam board insulation. Was the easiest method for me since I was doing non-conventional framing. Just cut, put in-between the studs, drywall.

    Basement is the go to place in the summer during the heat (like all of last week). Haven't gone through a winter with it yet but I imagine I'll need a few blankets.


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    Re: Basement temperature

    If the basement is completely underground, the ground below frostline stays at about 55 F, if I remember correctly. The air gap between your concrete and drywall will provide some insulation from the cold transfer in the winter. The problem with blowing insulation into the outside walls is that, unless you put vapor barrier behind your gyp board, moisture will migrate through the gyp board and possibly reach a condensation point in your insulation. This can cause problems, and at the very least, will reduce the efficiency of the insulation. I'd say leave it the way it is.


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    Re: Basement temperature

    I can't remember how ours was constructed (less than 5 yrs old). Most of the basement if finished with a large unfinished area that is storage and a playroom. It isn't any cooler in the unfinished area than in the living area. If we are going to be down there watching tv we just throw on slippers and use blankets. Sometimes my husband will turn on a small space heater we have, but of course that is pretty inefficient in the large living area. We keep our thermostat settings pretty conservatively--I think nights in the winter we go down to 63-65. If we are having guests stay down there, we will set it warmer but both sets of parents claim they like to sleep cool.

    Our master bath is a whole other issue. It has two exterior walls on the NW corner of the house. We have an empty farm field behind us in the winter and no trees in the yards out back (until now, just did some landscaping). In the winter it will be a good 8-10 degrees cooler in there. Not fun for those middle-of-the-night bathroom trips for a woman--that will wake you up. ;) We bought the house as a spec house and the tile was going in the day we offered. If we could change anything, it would be to put in heated tiles in there.



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    Re: Basement temperature

    Quote Originally Posted by titleist View Post
    I do run a dehumidifier. The reason I ask about temps now is because we are going to be doing some remodeling down there soon for the bathroom. Just wondering if there is something quick and easy to do now before the fall temps approach and before we move some furniture in.

    I've read a little about cutting a strip of drywall at the top and blowing in some type of material down the wells. No idea how messy or complicated this process really is..
    I'd definitely test it out for the winter before doing anything - see how it feels and then decide if you want to make any changes. The new building code coming out is going to limit the amount of insulation to R10 in basements (which is a very small amount). The reasoning is that no matter how well done the waterproofing is done on a foundation wall, it will eventually leak somewhere and with too much insulation and a compromised vapor barrier, you will likely trap moisture and end up with a mold problem.

    An over-insulated basement is actually a bad thing.



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    Re: Basement temperature

    Basement? It puts the lotion in the basket. It does as it is told.



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