Moisture Control

Crawl Space Ventilation

Crawl Space Ventilation Solutions from The Bug Man

Old crawl space thinking and old building codes had builders placing crawl space vents on opposite sides of the house hoping that outside air would enter a vent on one side of the crawl space and exit out the vent on the other side. In effect, this would remove damp, musty crawl space air with clean outside air.

Problem is… that’s not how it works.


What the actual science of it tells us is that air movement is upwards in a house, like a chimney. This upward air movement is called a Stack Effect, and this Stack Effect draws air inward from every crawl space vent and up into the living space of the home, eventually exhaling this air out of the upper levels. So where crawl space vents were supposed to remove moisture, they actually contribute to increased moisture in the crawl space during the humid months of summer. These crawl space vents also increase heating costs in the winter from sucking in cold outside air. It’s a lose/lose situation.

If Crawl Space Ventilation Doesn’t Work, What’s the Solution?

Crawl space encapsulation is the answer! Seal the crawl space with a vapor barrier, seal the crawl space vents, seal any gaps or holes to the outside, seal the crawl space door, seal it as tight as possible.

Crawl Space Encapsulation the Right Way

Install a vapor barrier and then seal any crawl space ventilation. Our crawl space encapsulation system is the best solution! It is a tough liner that you or any service people can crawl on with no fear of it tearing or coming off the walls (yes, you need to cover the walls).

Crawlspace Encapsulation System


Warning: Combustible Appliances (a furnace) Need Air

Crawlspace encapsulation installers at The Bug Man know all about this… a combustible appliance such as your furnace needs air to operate. So the size of your crawl space makes a difference, as does the possibility of having to draw air from somewhere to feed the appliance. Let an expert help you with this decision.

Crawl Space Ventilation

Encapsulating a crawl space is a great start, and in many cases, depending on where you live and relative humidity levels, it may be all you need. But if you need more, an installer from The Bug Man can help! There are two good options for conditioning a crawl space.

  • Dehumidify the space with an energy-efficient and cost-effective dehumidifier that is powerful enough to do the job – our crawl space air system is the best option available.

Do It Once and Do It Right!

Call 501-663-9464 for a free estimate and inspection from The Bug Man. You will be educated as to the science of a crawl space, and solutions to make your crawl space and entire home healthier.

Fungus Treatments


The Bug Man Inc. also offers fungus treatments. A fungicide solution of Bora-Care or Tim-Bor is applied to surface area. Its patented formula penetrates deep into the wood, providing long-lasting protection against decay fungi, dry rot, and insect infestation that may accompany moisture problems.