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-   -   Ice dam on new roof (http://www.diychatroom.com/f2/ice-dam-new-roof-171686/)

merlin1 02-11-2013 02:45 PM

Ice dam on new roof
 
I live in northern Indiana
I am having ice build up on a 10' section of my new roof .There is 13" of insulation and good ventilation
It's over the furnance, dryer and hot water heater that is exhausted out of the side of the house at the sill plate level
I believe that's my problem but how do I correct it?
Merlin1

SeniorSitizen 02-11-2013 03:17 PM

Is there water standing behind the dam as depicted in this link?

http://www.google.com/imgres?imgurl=...9QEwAw&dur=290

paintdrying 02-11-2013 03:40 PM

Those plug in heating cables never fail.

joecaption 02-11-2013 04:02 PM

Got a picture?

Canarywood1 02-11-2013 04:17 PM

Quote:

Originally Posted by merlin1 (Post 1115005)
I live in northern Indiana
I am having ice build up on a 10' section of my new roof .There is 13" of insulation and good ventilation
It's over the furnance, dryer and hot water heater that is exhausted out of the side of the house at the sill plate level
I believe that's my problem but how do I correct it?
Merlin1



You've only got an R32 rating and the recommendation for your area is between 49and 60,so you need more as is evident by the ice dam you have now,i'll attach a link for a calculator to see how much more you'll need.

http://www.lowes.com/cd_Blown+In+Ins...ator_748453603_

joecaption 02-11-2013 05:16 PM

http://www.energystar.gov/index.cfm?...sulation_table

danpik 02-11-2013 05:29 PM

Quote:

Originally Posted by merlin1 (Post 1115005)
I live in northern Indiana
I am having ice build up on a 10' section of my new roof .There is 13" of insulation and good ventilation
It's over the furnance, dryer and hot water heater that is exhausted out of the side of the house at the sill plate level
I believe that's my problem but how do I correct it?
Merlin1

I deal with the same issue every winter. My boiler is a sidewall vent also. The heat from it rises up along the outside wall and gets in thru the soffit vents cousing significant ice damming in that area only. Next winter I plan to test a deflector of some sort in that area.

Gary in WA 02-11-2013 06:51 PM

Pictures would help...

Gary


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