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Crawl space moisture issues - Rotten floors
Posted on 8/6/15 at 10:39 am
Posted on 8/6/15 at 10:39 am
Has anyone dealt with rotten wooden floors in a raised home? We purchased an older home one year ago, it is on piers, about two feet off of the ground. We knew that there was humidity problems under the house, and we are stuck changing out floors. It is so bad in some places that the actual sill or support beam that rest on the cement piling is rotten including the floor joists, etc. it is open on to the outside air on roughly 70% of the North side, and the South side has vents. I am looking into ventilation system to install underneath the house, and have found a few things online, but figured I would try here. We live in South Louisiana, it is obviously very hot and humid. PLEASE HELP!
8
Posted on 8/6/15 at 10:43 am to EasyTiger
Make sure there is good airflow under there (which I see you are doing). My own experience with floor issues are from running the ac very cold and condensation forming under the house. We opened up the bottom and bitched at our tenant for being a wacko and trying to cool the place down to the mid 60s. No problems since.
Posted on 8/6/15 at 10:53 am to EasyTiger
lots of people in raised houses having this problem, including myself. It's all about the ventilation.
My floors are buckling badly but they will return to normal once November hits.
My floors are buckling badly but they will return to normal once November hits.
Posted on 8/6/15 at 10:55 am to EasyTiger
Is the issue just moisture under the house or moisture getting into the air conditioned space?
You could do one or two things depending on the issue. If the moisture is getting in the house you could put spray foam, foam board, vapor barrier, etc. under the floor joist.
If the moisture is in the crawl space you could get a thick visqueen (14/20 mil) and roll it on top of the mud. Make sure you tape the joints.
You could do one or two things depending on the issue. If the moisture is getting in the house you could put spray foam, foam board, vapor barrier, etc. under the floor joist.
If the moisture is in the crawl space you could get a thick visqueen (14/20 mil) and roll it on top of the mud. Make sure you tape the joints.
Posted on 8/6/15 at 10:56 am to EasyTiger
Have you looked for other sources for the rotten joists? That seems extreme but I guess years of moisture could do it.
We have had issues with joists near the bathroom (slow leak over years) but thats all.
We have had issues with joists near the bathroom (slow leak over years) but thats all.
Posted on 8/6/15 at 10:57 am to EasyTiger
You have poor ventilation (air flow) under the house. If you have rotten floors, which is a really bad sign, then you probably also have a massive amount of black mold down there.
Big job to fix.
Good luck.
Big job to fix.
Good luck.
Posted on 8/6/15 at 11:02 am to EasyTiger
Had the same problem in the old house. The front had a brick wall going to the ground (blocking airflow) and at some point a previous owner had enclosed the garage (blocking airflow on that side).
After replacing the living room floor and sub-floor, I cut 4 holes across the brick wall in the front and installed some crawl space vents with built-in fans. I had them on a timer to run during the day and shut off at night. Probably not the ideal way to do it but I was looking for anything to help create airflow.
After replacing the living room floor and sub-floor, I cut 4 holes across the brick wall in the front and installed some crawl space vents with built-in fans. I had them on a timer to run during the day and shut off at night. Probably not the ideal way to do it but I was looking for anything to help create airflow.
This post was edited on 8/6/15 at 11:03 am
Posted on 8/6/15 at 11:29 am to EasyTiger
Have the same problem in my shed. I thought it would look nice with Austin stone around the bottom and keep the varmits out.
Now I have to replace the floor and cut out some blocks and add a solar powered fan to move some air
Now I have to replace the floor and cut out some blocks and add a solar powered fan to move some air
Posted on 8/6/15 at 12:21 pm to EasyTiger
Install some crawl space vent fans and cut new vents if necessary. If you have a shite ton of moisture try to find the source and get the moisture away from the crawlspace. Not having gutters, having downspouts that dump too close to the house and poor grading away from the house can exacerbate the moisture problem.
Posted on 8/6/15 at 8:59 pm to terd ferguson
Where did you find the vents with built in fans? We have vents, but obviously not enough.
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