- Look for a low permeability rating (minimal chance of unwanted moisture entering the home). The building lot should have a high enough water table and be away from underground springs. The slope of the land is a key factor to avoid water running toward the house.
- Check crawl spaces to make sure there is no moisture. Crawl spaces tend to be damp and are therefore a challenge for mold avoidance.
- Does this home have a basement? Is it finished or unfinished? If it is unfinished, make sure the dirt is dry. Consider adding a vapor barrier before finishing. If it is finished, look for history of water damage. Carpeting is a potential problem.
- Check the drainage of the home. The roof should have overhangs to help carry drainage farther away from the structure. Check the flashing (a thin sheet used to prevent water intrusion). Improper flashing is a common cause of roof leaks. Ask about any history of roof leaks. Shingles at the eaves should project beyond the edge of the roof framing. Check gutters and downspouts to see that they are properly installed.
After your move, consider adding inexpensive splash blocks to help carry water away from the home.
- Be sure wood siding stops well above the ground to avoid stain and rot.
- Make sure windows are installed right side up so the weep holes drain properly.
- Avoid central humidification systems, if possible.
- Check to see that drip pans for cooling coils are draining properly.
- Check the locations of the closets. If a closet runs along an outside wall, the cold wall can meet the heated inside air and form condensation. Good quality construction will allow for proper insulation of these closets.
- If the home appears safe and has no history of water damage, consider testing the home:
- An ERMI mold test can rule out the presence of toxic mold. This can be done by vacuuming a sample of dust and submitting it to a lab for analysis. It is important to rule out the presence of stachybotrys and other toxic molds. If you have experienced a prior mold exposure, look for a home with an ERMI value of 2 or less.
- A thermal inspection of the home can reveal hidden moisture. To learn more about thermal imaging, visit the Thermal Moisture Imaging website.
Guidelines for Buying a Home
What should we look for when buying or renting a home? How can we choose a safe environment and avoid hazardous water damage that can lead to serious health issues? The following 10 guidelines are based in part on the book The Homeowner's Guide to Mold by Michael Pugliese.
Andrea, thank you for a great list!
ReplyDeleteI wanted to add, buy the best HVAC that you can. We had an unusual problem with our new home. Brand spankin' new, and we moved in and it was SO HUMID inside! I even bought a dehumidifier a few days after we moved in. The reading on the unit said 94% humidity! Of course, I panicked. We had the builder's HVAC guys come out to fix it three times, and still it got no better.
In short, the problem was that our HVAC unit, while very good quality, was actually too large for our home. We bought the smallest footprint in the subdivision, and they had installed the "usual" unit in our smaller home. The unit was so effective at cooling that it did not need to draw the air back through consistently enough to pull out the moisture. So it was cool and damp in our home.
They fixed it, and now all is well.
Sometimes it takes good old fashioned detective work to figure out moisture issues. Our favorite repair man said that it's rare that people bother to fix many things anymore, and when they do, it's often not done right. It's an absolute must to properly maintain a home.
Blessings,
Amanda in VA
And these are great guidelines for figuring out if you want to rent a home too, without spending too much on inspections.
ReplyDelete