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6 items to troubleshoot in your crawl space

Crawl spaces provide a great home for rodents, mold, asbestos and other fun things. Here are a few items to look after in your property.

Crawl spaces are great for storage but because humans don’t frequent this area of the house, certain issues can fester. Conducting a DIY inspection of your crawl space can be a good way to keep tabs on the area but bringing in a pro will give you the full picture.

Because lists are always helpful, let’s start with a general list of what to focus on while performing an inspection of your crawl space (in no particular order):


A lack of airflow is a problem for several reasons. Mold and other types of moisture damage can become much worse and spread faster without ventilation. This is especially true here in the Pacific Northwest.

Foundation Cracks

Cracks in the foundation can be very bad news (especially horizontal cracks), or not a big deal at all (vertical cracks). Horizontal cracks usually mean ground forces are causing the foundation to bow - not good. Vertical cracks are common and not a cause for concern. Vertical cracks are usually caused by precipitation putting pressure on the foundation but stability remains.


We recommend having an electrician come in to evaluate the situation. What you want to be wary of is any electrical wiring or equipment near moisture build-up. Knob and tube wiring is common in the Puget Sound region and it should be replaced or at least inspected somewhat regularly.


Per the Environmental Protection Agency, every type of mold can cause some health effects. Three types of mold typically occur in crawl spaces: black, white, and yellow. Mold can cause serious allergic reactions and should be dealt with as quickly as possible. Again being in the Northwest, unfortunately mold is common. Black mold (sometimes looking grey or greenish) is the most dangerous. White mold is still dangerous (often looking fuzzy) but not as bad as the black variety. Yellow mold occurs on organic material (wood) and can cause decay and destruction of the material it inhabits. Vapor barriers can be installed on your crawl space floor and up the walls to prevent mold.


Insects and little critters love these areas in a house. Termite damage is easy to spot and mice/rats/squirrels leave their droppings everywhere. It’s best to get ahead of these issues and they’re pretty easy to fix (call a pest control company), it just requires some diligence and the occasional inspection.


Another really bad one along with the black mold. With many, many houses in the Puget Sound region being built before 1980 (when asbestos was used frequently) this is a point of concern for homeowners. Asbestos can be in the walls, ceilings, floors - virtually anywhere in a crawl space. When this material is destroyed the toxic fibers go airborne and can seriously contaminate the air, possibly making a home unlivable. If you haven’t had a professional out to your house to check on this, please do!

In conclusion, crawl spaces can be a source of headaches for a landlord. It’s best to have a look in this area at least a couple of times a year - here at HomeRiff, we can definitely help.

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