Crawl Space Humidity Chart

Crawl space humidity should generally remain at or below 55.

Crawl space humidity chart. As it does all organic material in your crawl space will be damaged including wooden floorboards and support beams. Typically humans do best in humidity levels ranging from 30 60 with most people feeling most comfortable around 50 60. Before you look for the ideal crawl space humidity level you should think about the right humidity in your house as a whole. As the humidity levels rise in crawl spaces moisture condensates on the surfaces leading to serious problems in your home.

Ideally the level of relative humidity in your crawl space should be 55 on the high end. You can measure relative humidity using a hygrometer analog or digital. If the humidity level of your crawl space is high the damp air from the crawl space will get into your home this leads will affect the quality. However it s a good idea to measure this humidity level year round.

You may need to do specific things to maintain your crawl space humidity in different seasons. Crawl space humidity has been plaguing homes in north carolina and virginia since the first day they were built. This is due to a phenomenon known as the stack effect. In some extreme cases sections of the floor may even begin to.

Since his crawl space system was installed back in september he has been recording temperature and relative humidity in the crawl space in his house and outside. The goal is to keep the humidity in the crawl space below the 70 where mold and mildew start to become a problem. Effects of high humidity in crawl space. So if you have 90 degree air at 70 humidity typical summer conditions and cool it down to 70 degrees typical crawlspace temperature the humidity level in that same air changes to 100.

The humidity has been running between 65 78 using only existing leaks in the duct system. The right relative humidity year round. According to experts up to 50 of air within the home can come from the crawl space. One of our customers from charleston sc is a data crunching kind of guy.

Crawl space temperature and humidity chart. As a general rule you should typically keep your crawl space humidity level under 55. Typically however you can tell just by entering the space if the humidity feels high if the air feels wet that s your sign. The crawlspace has been sealed and i have been monitoring the humidity levels with a remote monitor for the last several months.

Humidity can enter the crawl space when saturated outside air is allowed to flow into a dry crawl space or when water is allowed to stand in the area. These problems can lead to health issues and the need for expensive repairs. While your crawlspace may not look as bad as the one in this picture the mechanism described above is still what is happening. As humidity builds in your crawl space it creates an ideal space for mold and rot to grow.