One of the first things you may think of is animals and insects. An under-home crawlspace can provide the ideal environment for rodents, insects and other vermin, some of which may be poisonous or become dangerous if they feel cornered or threatened in some way. It’s very important that you enter the space very cautiously because in such a tight space it would be difficult to make a hasty retreat.
One hazard you will likely find in the under-home crawlspace is mold or fungi. Sewage or standing water could be another problem. All of these have known health risks.
Another major concern would be if you suspect the home has some kind of structural damage. In such a situation it is not advisable to enter a crawlspace. It is better to have first have the home inspected so that you know what type of problems you are dealing with.
Now that we have mentioned some of the dangers with entering a crawlspace its important to make sure that, if you really need to be in such a space, you wear the proper protective clothing and equipment needed to keep you safe down there. You should also make sure someone is aware that you are going down there and is available to raise an alarm if the need arises.