Crawl Space Ventilation


Constructing codes in Dallas Fort Worth, Texas and throughout the United States had basement and crawl space grills on opposite sides of homes. Ventilation was the idea behind the building method, which was thought to succeed like this: humid basement air would be replaced with clean outdoors air in a continuous ventilation process. Nevertheless in reality, this theory did not work. Air moves upward in the home. Thus, air coming through vents is actually drawn from the basement and sucked into the upper floors of the home. The method that was intended to resolve the wetness issues in Dallas Fort Worth homes and elsewhere, contributed to worsening the moisture and moisture situation in basements as well as the rest of the home. Vents installation increased mold, wood rot, poor air quality, musty odors and pests in Dallas Fort Worth homes. Crawl space ventilation also led to increased electrical power bills.

Elite Moisture Solutions discusses that ventilation is a factor for crawl space moisture factors; however , science provided the ideal solution that has been working well in Dallas Fort Worth homes as well as all around the United States. Crawl space encapsulation is a comprehensive solution to moisture problems for Dallas Fort Worth homeowners. Encapsulation seals the floor and walls with a sturdy polyethylene vapor barrier liner. In addition , vent covers seal outside the house air coming in through the vents. Cracks, gaps and holes are sealed tightly. The outside door is also covered so that there is no ongoing ventilation in the basement area.

Encapsulation is a complete solution to crawl space moisture troubles in many homes. At times, though, in situations of high relative humidity, there may be a need for additional underground room conditioning. Dehumidifying the Dallas Fort Worth, Texas crawlspace using an energy efficient dehumidifier is a good choice. A 2nd choice for decreasing humidity in the basement is to use a conditioning unit to get conditioned air from the property down into the basement area. Professional crawl space contractors will work with homeowners to ensure the encapsulation solution is normally right for the specific crawl space moisture problems present.

Top 5 Crawl Space Repair Mistakes


Several homeowners search the internet for crawlspace repair information and end up in home repair forums. While there is a few quality information in forums, there are many examples of bad and outdated advice related to fixing your crawlspace. May possibly witnessed firsthand the results of bad crawlspace repair and would like to describe the worst 5 crawlspace maintenance I've seen:

1 . Adding more vents to the crawlspace - Old building codes and bad recommendations have resulted in homeowners adding more vents to their crawlspace in order to dry the high moisture content on their crawlspaces. The thinking behind ventilation was that air circulation would force the moisture in the investigate space air to end up outside. Through testing, it has been proven that warm, humid outdoor air brought in the crawl space through foundation vents in the summer can lead to increased moisture levels in the crawlspace.

Also, air movement in a home does not move side to side through the vents, but instead upwards (Stack Effect). This Stack Influence draws air inward from every crawl space vent and up into the living space of the home. A properly encapsulated crawlspace is the only solution to reduce high moisture levels in a crawlspace.

2 . Spray Foam a damp crawlspace foundation wall - While spraying open or closed cell foam in your home is one of the most efficient forms of efficiency, it is rarely applicable in a crawlspace. Spray foam insulation traps water and moisture in the block walls or between the wall and the foam. This moisture has nowhere to go but UP, especially since some sort of building's air movement is upwards (Stack Effect).

Up above the foundation are wood components (sill eating plan, floor joist, bandboard, and subfloor) that are susceptible to wood rot and mold growth. See my article on spray foam insulation in a crawlspace for more information.

3. Attach a vapor barrier to the floor joists - I have not seen a single crawlspace repair mistake more responsible for wood rot and mold as compared to when plastic is attached to the floor joist system. The thinking behind this is to stop moisture intrusion in the crawlspace air from entering the wood components. There are many problems with this; but the most important to know is that a lot of crawlspaces are vented and the cooler surfaces such as duct work, pipes, and the floor will condensate inside summer. The plastic will trap the condensation up against the floor structure causing mold and wood decompose to occur.

4. Insulating a damp crawlspace with fiberglass insulation - This is another example of aged advice resulting in mold growth. Paper faced insulation is "mold candy". Do not insulate your floors using fiberglass insulation.

5. Improperly installed drainage system - Many crawlspaces have water standing on the ground floors after heavy rains. There are many reasons why water enters, and several solutions to prevent or remove the standing water. That worst solution is to ignore this recurring problem, or repair the problem with a stand alone pit and send (especially a pump in a five gallon bucket). A sump pump alone cannot pump all the mineral water that pools around the perimeter or in the middle of the crawlspace. A perimeter drain is necessary to intercept the pool and facilitate it to the pump.