It’s best to vent the clothes dryer directly to the outside of the building. In fact – the building code requires it to be terminated outside the building. For the few homes that are built on a crawl space, that doesn’t mean you can or should terminate the dryer under the house. The building code says that’s a no-no too.
Statistics show that more than 15,000 residential house fires a year are caused by poorly maintained dryer vents. Here are some tell-tale signs of trouble ahead. The home I inspected had a vertical, schedule 40 PVC pipe installed in the wall that terminated through the roof. Peeking into the vent just behind the dryer, I noticed lent build-up.