Due to the various activities that take place in the home, moisture is bound to build up in the air. When this air cools down, condensation takes place and water droplets form on cold surfaces such as the walls and windows. The accumulation of water droplets in the home causes it to become damp. The damp surfaces become a breeding ground for mould and if the home has structural supports made from timber, they can rot and get damaged. The supports will then have to be replaced which can be costly.
When there is an accumulation of moisture on your under floor, this moisture can get absorbed by the floor of your home. If this floor is made from timber, it will end up expanding due to the moisture. This will cause the timber to lift up and your floor will become uneven. Termites are also attracted to moist areas and can cause serious damage to the timber on your sub floor.
Mould spreads very fast in moist surfaces and can cause breathing problems, chest pains and you can even end up developing asthma. Dust mites are also attracted to damp areas and you can develop eczema when they land on your skin. The dangers of having too much moisture on your under floor can be life threatening and you should therefore ensure that you have sufficient sub floor ventilation.
Once you have sufficient ventilation on your under floor, your health will be much better as you will breathe in fresh clean air that is free from fungal spores and other allergens. Pests such as termites will no longer be attracted to your home, and you will not have to deal with rats and cockroaches which are also attracted to damp areas. Fungal decay of the timber in your under floor will not occur and the structure of your home will be intact.
You also have the option of installing vents around your under floor that are in a color which will make your home look attractive. As long as you use vents which are resistant to corrosion such as brass vents, there will be no cost of maintenance. If you need to install fans to have adequate sub floor ventilation, you can use the ones which have a timer which will reduce the cost of running them.