Crawl Spaces & Basement

Insulation and Remediation

There may not be an area of the home that creates a bigger hazzard to the occupants health than that of a typical crawlspaces. Most homes with crawlspaces are not properly insulated for moisture control and this can pose health concerns for the occupants, especially children. Lack of properly sealed and insulated crawlspace can allow dealdy and odorless gases to affect occupants. It can also become breeding ground for insects, rodents and mold. In addition, it could cause damage to the foundation and the floor system.

The Stack Effect

Graphic showing where air will infiltrate a home even if you have proper window and door sealing.

Crawl spaces are often damp, humid spaces due to water runoff from rain, irrigation systems or an elevated water table. While the building code requires crawl space ventilation, this ventilation does virtually nothing to mitigate moisture problems and can actually make moisture problems worse. Houses operate like chimneys. If you introduce a hole at the bottom of a chimney, a natural draft ensues as air exits the top of the chimney. This is called stack effect. Attic ventilation is the top of the chimney and crawl space ventilation is the bottom. As air is drawn up through your house, moisture, mold spores, odors and soil gases from the crawl space find their way into the living space.

The Solution

Crawl space encapsulation involves sealing the under side of the floor with a Closed Cell Polyurethane spray foam appliation and covering the ground using a tough 15-20 mil, reinforced polyethylene sheeting (not some thin 6 mil poly) taped carefully at the seams and adhered to the top or bottom of the concrete foundation wall. Sealing up all ventilation entering the crawl space is a specification ‘if’ it is decided that ventilation is not neccessary for mechanicals. Sealed below this sheeting are soil gases, moisture, water vapor and odors that typically would be drawn up into the living space above. The Foam Connection Solution We are very proud of our projects because our specs are superior and our prices even better! We do not pay any enormous franchise or licensing fees to national companies and therefore, we are able top design a system that fits your home and your budget.