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Old 01-28-2011, 06:11 PM   #1
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ice on outside of house


I recently had my bathroom window taken out, cause it was in the shower, and leaking. Now it's a tub surround and wall. I know I have to go up on my CFM rating on my exhaust fan. But, meanwhile, when we take hot baths or showers we get condensation on the ceiling above the tub. So, much that it drips down.
And just this week, we have been having alot of snow in Massachusetts and very cold (sub zero) temps. I've noticed that on the outside of my house, right where the bathroom is...there is ice frozen onto my outside wall...like it was running down from the sofits and froze. Also, i noticed it was about 20 degrees out and the icicles on my gutters in that area were still dripping (melting).
My take on this is that I need more insulation in the area on top of my bathroom and probably other places. I think the heat from the house is going into the attic and melting the ice and causing condensation in the bathroom.
Any suggestions or ideas
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Old 01-28-2011, 06:27 PM   #2
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ice on outside of house


Sound like you are on the right track--No insulation above the bathroom--I hope that insulation was packed into the walls before the tub surround was installed----

Did you take any photos during the construction?---Mike---

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Old 01-28-2011, 08:35 PM   #3
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ice on outside of house


You may also have poor ventilation in the attic that allows the moisture to condense. Without good ventilayion your attic area is too warm and more snow will melt and then freeze before it can be drained by the gutters. The only place for it to go is down the exterior wall (either outside or inside the wall).

Improperly placed or too much insulation can destroy the desired ventilation.

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Old 01-29-2011, 06:22 AM   #4
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ice on outside of house


Where does the exhaust fan exhaust. It must be to the outside, thru a roof cap or out a gable end, not into the attic.

And you should have at least 12" of insulation in the attic, with soffit/ridge vents.
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Old 01-29-2011, 07:28 AM   #5
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ice on outside of house


I plan on buying those plastic vents to go in between the roof supports for ventilation. and then bring the insulation right up to them in the tight corners of the attic...looks like I'll start this week above the bathroom.
What are those plastic vent panels called...and what size nail do i use to install them???
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Old 01-29-2011, 07:40 AM   #6
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You can also insulate from the inside by putting up a 2x4 frame stuffed with rigid polystyrene panels and creating a false ceiling so to speak. Cover with drywall. OK not a cheap fix but a possibility...I'm doing this as I have paint peeling over the shower and all I need is to add a few inches of insulation in a 5'x9' bathroom.
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Old 01-29-2011, 11:35 AM   #7
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ice on outside of house


Here are some pics of the ice dam, ice on the house and the attic insulation above my bathroom
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ice on outside of house-attic-insulation-2.jpg   ice on outside of house-ice-house-2.jpg   ice on outside of house-ice-dam-2.jpg  
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Old 01-29-2011, 04:13 PM   #8
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ice on outside of house


You have ice dams. Older roof without ice and water shield. You can improve the issue with an upgraded insulation and the rafter baffles, but to eliminate it, you'll need to install the cable heating wires on the roof and in the gutters and leaders.
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Old 01-30-2011, 10:56 AM   #9
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yeah, it's an ice dam, never a doubt about that..
Roof is three years old, with ice shield 3/4 the way up
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Old 01-30-2011, 12:39 PM   #10
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Quote:
Originally Posted by Barry J View Post
yeah, it's an ice dam, never a doubt about that..
Roof is three years old, with ice shield 3/4 the way up
If you have Ice and water shield 3/4 the way up the roof, you should not have these issues.
It was either put up incorrectly or you don't have it or the issue isn't water getting in from the ice daming.
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Old 01-30-2011, 03:49 PM   #11
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ice on outside of house


If there is more ice there it is most likely due to heat escaping above your bathroom as already posted. Where does your bath fan vent out. They somtimes like to have them venting throught the soffits. That is a bad plan and would also contribute to ice forming outside your bathroom.

I have to rake the snow off my roof, more so this year than most. I don't worry about water intrusion since my roof is 2 years old with IWS 6 feet up, but I do worry about the weight of the ice on the gutters. I have had gutters come down before.
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Old 01-30-2011, 04:18 PM   #12
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ice on outside of house


yeah, I have ice sheild installed 3/4 the way up and properly...the issue was originally the condensation on my bathroom ceiling, which i figured out was not enough insulation above the bathroom. The exhaust fan is being vented out correctly thru the roof. I just wanted some reinforcement about my theory that insulation needed to be added. The ice dam probably happened also from not enough insulation in the attic and the ice melting and dripping down. I cleared the snow off my roof and will let the black shingles and sun melt it down.
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Old 01-31-2011, 12:29 PM   #13
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The insulation is also dirty, which indicates air intrusion. It could be from before the renovations; you can't tell.
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Old 01-31-2011, 04:13 PM   #14
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ice on outside of house


Wow, this is weird. I'm also a Mass resident and after looking at those pictures, I had to do a double-take to make sure it wasn't my house.

At this point, I'm just looking for techniques/recommendations on how get the ice situation under control in my gutters. I found my fascia boards are getting soaked, because the rocket scientist who used to own this house installed shiny new vinyl gutters with no roof apron. So it's just ice melting against bare wood. Greeeeeat.

I've read mixed opinions on using ice melt chemicals like calcium chloride and magnesium chloride. (Noooooo sodium chloride!) There are advertised 'roof melt' tablets that use the former. Thoughts?

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Old 02-01-2011, 07:19 PM   #15
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ice on outside of house


I'm afraid we are stuck with the ice in the gutters until it thaws. I would not be tempted to put ice melt up there. These are extreme weather conditions we are being subjected to this year. I can't remember when the last time I had this much ice but then, I've lived in my house 15 years.

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