Crawlspace access: What is it? Where is it? Why does it matter?

crawlspace access outside First time home buyers may have heard the word crawlspace (or crawl space) but not had a good idea of what it refers to – especially if they have only lived in houses built on slab foundations. So let’s touch on it today.

What and the Where?

When homes are built on a raised foundation, also called a perimeter foundation, rather than slab foundation, there’s space between the dirt under the house and the house itself – often 3′ (but not always), sometimes more.  Unless the structure is built on a hillside, there won’t be enough height to walk around in that space, hence the need to crawl in the crawlspace.

Most of the time, access to this space is indoors and specifically on the floor of a closet, where there appears to be a flat opening of about 3′ by 3′, sometimes smaller.  This can make entry tight.  At other times. the access is via the outside, as with the photo at the left (more likely the case in properties built before 1950 in Silicon Valley than in newer properties.)

Here it’s a lot easier for homeowners, inspectors and repair people to enter – but also easier for animals and pests, such as rats, to make their way in.  Care must be taken, as with the vent screens, to keep unwanted visitors out!

Crawlspace Video

Auditory learner? Or TLDR, and just want a quick-take? Watch this 1min 46 second video to get the summary:

Monitoring the crawlspace

If your home has a crawlspace, you will want to monitor it. (more…)