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Old 12-14-2013, 09:06 AM  
kdoherty618
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Default condensation

we have water marks around our ceiling in our house. someone told us maybe our insulation is all the way down to out facia and soffits. How would you fix this problem.is there a company who would do it.do you have any idea of cost?



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Old 12-14-2013, 09:29 AM  
nealtw
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Welcome to the site: There will be companies that will be happy to take your money, but first we should figure out what is causing the problem.
What shaped roof do you have?
What type of roofing do you have and how old is it?
How much soffet venting do you have? Vented vinyl or aluminum or just a few holes cut in wood.
How many vents do you have on the roof near the peak usually in a row on the back side? and guess at the size
Do you have vents in the gable ends of the house?
Do you have an entrypoint to the attic?
What tupe and thickness is the insulation up there?



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Old 12-17-2013, 06:26 AM  
kdoherty618
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Default condensation

we have a ranch home with an attached 2 car garage. we only have 3 vents on the roof. roof is only 2 years old. someone said the insulation might be all the way down in soffits. I have been told to add 5 more vents or been told to get a power fan put in.. can you advise me thanks. if insulation is down in soffits do they have companies that will come in and remove it?

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Old 12-17-2013, 07:14 AM  
nealtw
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You won't know for sure until someone gets up in the attic and looks at it. Newer houses are buit pretty tight, you need to run bthroom and cooking fans much more than you would in an older house. You might get an insulation company or a building inspection company out to at least have a look.

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Old 12-18-2013, 09:40 PM  
GBR
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Welcome to the forums!

You don't mention your location.... if in a heating climate, usually water marks are sign of warm moist interior air condensing on a cold drywall ceiling- the "first condensing surface"; http://www.buildingscience.com/docum...bout-diffusion

You may have oil-based paint with cold drywall due to lack of insulation behind/above the condensing area. The inlet from soffit may be moving air past that area, check for continuous soffit venting for each rafter bay and figure your NFVA for your attic; http://www.airvent.com/homeowner/pro...it-specs.shtml

Pictures of the existing intake vents (from the ground) will help us to figure your venting for you, is there a poly sheet next to the ceiling drywall on the attic side?

Gary



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