Your home could contain an unseen, perfect environment for pests. They thrive in moist, warm conditions, and most homes have at least one area of excessive moisture, usually an area that is out of your sight. Small leaks, condensation, and periodic flooding can go unnoticed by you, but at the same time represent a very attractive environment for pests.

Gressette Pest Management technicians are trained to identify these areas. We know that ridding your home of pests often requires changing the environment that drew them to your home in the first place. We will recommend moisture control measures that can help ensure that your family is the only occupant of your home.

Many homes have a full or partial crawl space and chances are you, the homeowner, have never seen it. Our technicians know that crawl spaces are havens for pests. Just a few feet below an immaculate living room, a crawl space may be an overly moist, un-ventilated area that reduces the effectiveness of your heating and air conditioning in addition to offering a prime living space for pests of every kind. Gressette Pest Management technicians often find puddles of water, mold, mildew, and deteriorated insulation. We can quickly and economically correct those deficiencies and eliminate the pest problem as we do so.

Vapor Barriers or Vapor Diffusion Retarders

In most U.S. climates, vapor barriers or vapor diffusion retarders should be considered as part of a moisture control strategy for a home.

How They Work
A vapor barrier or vapor diffusion retarder (VDR) is a material that reduces the rate at which water vapor can move through a material. The older term "vapor barrier" is still used even though it may inaccurately imply that the material stops all of the moisture transfer. Since everything allows some water vapor to diffuse through it to some degree, the term "vapor diffusion retarder" is more accurate.
The ability of a material to retard the diffusion of water vapor is measured by units known as "perms" or permeability. A perm at 73.4°F (23°C) is a measure of the number of grains of water vapor passing through a square foot of material per hour at a differential vapor pressure equal to one inch of mercury (1" W.C.) Any material with a perm rating of less than 1.0 is considered a vapor retarder.
Vapor diffusion retarders can help manage moisture in these areas:

  • Basements
  • Ceilings
  • Crawl spaces
  • Floors
  • Slab-on-grade foundations
  • Walls

Effective moisture control in these areas and throughout a home includes air sealing gaps in the structure, not just the use of a vapor diffusion retarder.
How, where, and whether a vapor diffusion retarder should be used depends on the climate. Typically, the number of Heating Degree Days in an area is used to help make these determinations. A Heating Degree Day is a unit that measures how often outdoor daily dry-bulb temperatures fall below an assumed base, normally 65°F (18°C).

Does your house have a moisture problem? 

Protect the health of your home. Let us perform a crawlspace inspection at no charge.