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 with vent covers, 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

CleanSpace Crawl Space Encapsulation System

Install a vapor barrier and then seal any crawl space ventilation. The CleanSpace crawl space encapsulation system is the best solution! CleanSpace 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). The vapor barrier also has an antimicrobial agent manufactured into it to kill mold and bacteria that it comes in contact with. The crawl space vent covers and crawl space door are tough and look great – they are also all plastic, as is the entire CleanSpace system, so they never need paint, won’t rot, and mold won’t grow on them.

Photo showing CleanSpace installed in a home crawl space

Ask us about our 6 months same as cash offer on CleanSpace!

Warning: Combustible Appliances (a furnace) Need Air

Certified CleanSpace 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 a CleanSpace 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 realative humidity levels, it may be all you need. But if you need more, a certified CleanSpace Installer from the Bug Man can help! There are two good options for conditioning a crawl space.

SaniDry LogoCrawl-O-Sphere Logo

  • Dehumidify the space with an energy-efficient and cost-effective dehumidifier that is powerful enough to do the job – the SaniDry CSB crawl space air system is the best option available.
  • Draw conditioned upstairs air down into the crawl space, which can be done with a crawl space fan system like the Crawl-O-Sphere crawl space conditioning unit.

Do It Once and Do It Right!

Call 501-663-9464 for a free estimate and inspection from a certified CleanSpace Installer 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 is applied to wood and concrete. 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.