At AdvantaClean of Central Seattle, we know how much moisture there is in Seattle, and we also know how that can affect people's crawl spaces. If you haven't been down to your crawl space in a while, let our team thoroughly inspect it. We specialize in crawl space encapsulation.

We are backed by a franchise that has been around for more than 20 years, won the Best of HomeAdvisor Award in 2016, and remain a top-rated professional by that organization. We've sealed plenty of crawl spaces in our time, so let us explain what the process is like.

The Reason for Crawl Space Encapsulation

Crawl spaces can easily develop mold and mildew so long as a few requirements are met. When there's over 70% moisture in the air and organic matter that can serve as food, such as wood, then mold will thrive. The problem can also be aggravated by the presence of water. Perhaps a drain pipe has burst or was improperly installed; perhaps rain has seeped into the crawl space. Regardless, it will raise humidity levels and most likely require you to reverse the problem with crawl space dehumidifiers. Non-porous materials, like softwoods, will soak up that moisture; the result is wood rot and other structural damage.

Another thing to remember - and this can surprise a lot of homeowners - is that crawl space vents alone do not lower humidity levels. During warmer parts of the season, they can actually increase humidity. Remember that warm air rises, and if it's tainted by mold growth, it will affect your indoor air quality.

Crawl Space Ventillation

Installing a Crawl Space Vapor Barrier

The first step in crawl space encapsulation is the laying down of the vapor barrier. This is a plastic membrane, reinforced with fiberglass if need be, that goes over the walls, ceiling, and ground in order to prevent water from rising from the surfaces. The crawl space vapor barrier won't prevent actual condensation from developing; to do this, we'll have to seal the crawl space entirely. This means covering up the crawl space vents as well. You can also ask us for foam insulation.

Crawl Space Vapor Barrier Before and After

Installing a Crawl Space Dehumidifier

If water infiltration is a real problem, we can consider installing a perimeter drainage system with a sump pump and basin. As a last resort, we can install a crawl space dehumidifier that will run at all times to keep humidity levels under control.

Meeting Your Goals

The goal of crawl space encapsulation is to keep clients' property free from mold, wood rot, and other hazards. Give AdvantaClean of Central Seattle a call today whether you just noticed mold in your crawl space or you want to take preventative measures against flooding. We're proud to serve Seattle and the surrounding communities.


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