Summary: Condensation can create mildew and rot. Determine where it is coming
from. Vent free fireplaces or crawl spaces may be adding water vapor.
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Comments
Chris
06 Jan 2008, 21:45
We built a new home 1 1/2 years ago. We have condensation on all the
windows. Our window consultation from Pella said that we have to get our
humidity down in the house, which is always 40%. He said that it should be
more like 25% to 30% in the winter months. Do you think this is true?
Also, they gave us a sheet with about 20 different ways to decrease
moisture, and none of them pertain to us. (such as dripping faucets,
overuse of humidifiers, etc.) We have more than adequate attic venting.
We are wondering what our next step would be. Thank you. Chris
AsktheBuilder
07 Jan 2008, 06:09
Chris,
Your next step is to read all of my columns that are in my Condensation
category. When you discover the series on Indoor Humidity, you will be
amazed.
Dan
19 Jan 2008, 20:02
I have a detached, unheated, concrete block walled garage that has blown
insulation in the ceiling above sheet rock. During winter warm spells I
have serious problems with condensation. The floor will literally be
standing with water. The roof was recently covered with steel over ¼ inch
foam and on top of the previous layer of shingles. There is the poly-wool
type mesh at the peak for ventilation, but no vents in the soffit to allow
air in. I feel installing soffit vents will keep moisture out of the
attic, your thoughts? As for the water on floor and vehicles etc… I
understand that all the vehicles and concrete, walls and floor, are a big
heat sink and stay cool causing the warm wet air to condense, but will
installing a vent in the main garage help relieve this?
Thanks
Dan in IL
AsktheBuilder
20 Jan 2008, 08:38
Dan,
The answer is No. You have it nailed down - dew points and humidity levels.
You can minimize the condensation if you have lots of air moving through
that will possibly evaporate the water as it condenses. But when those cold
objects get hit with warm, moist air, you are toast...... Read all of my
past columns in my Condensation category to see how vexing this issue
is.... It is all about temperature. If you don't want condensation, then
keep objects *warmer* than the dew point of the air that surrounds them.
Terry
26 Mar 2008, 18:28
Hie I moved into a new build home 1 year ago recently i found that there
was a bild up of water in the kitchen under a laminate floor. I removed the
floor and allowed the concrete to dry but after putting the laminate back
in the flo is getting damp again. there is no leak so i wonder if it is a
condensation problem
AsktheBuilder
28 Mar 2008, 15:41
Terry,
It might be........
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