Lynchburg, VA Metro:
434-386-3130
Richmond, VA Metro:
804-545-0529
Charlottesville, VA Metro:
434-386-3130
Roanoke, VA Metro:
540-283-0829
Read Unbiased Consumer Reviews Online at AngiesList.com

Crawlspace Insulation

 

Unvented crawl space Recommendation

Remove the existing insulation and apply a minimum 10 mil polyethylene vapor barrier (this is thick enough to allow you to walk around on it without puncturing the membrane) on the floor of the crawl space and glue the edges up the crawl space walls at least 6 inches above the outside grade. We then close and seal all vents to the crawl space with rigid foam boards. If a combustion appliance such as a gas or oil furnace is present in the space, a dedicated air supply may be necessary. Finally, we apply at least a 2 inch average of Closed-Cell Polyurethane Spray Foam to cover the seam of the vapor barrier as well as the crawl space walls and vents. A 2 inch average of Closed-Cell Polyurethane Spray Foam is also applied to the rim joist and band board as crawlspace insulation. By using at least an average of 2 inches of closed-cell foam the homeowner gets an air and vapor barrier that eliminates the intrusion of cold and warm air through the crawl space walls while the polyethylene vapor barrier prevents the intrusion of naturally occurring moisture and pollutants that are present on the ground.

Unheated or Vented crawl space Recommendation

Remove the existing insulation and apply at least a 2 inch average of Closed-Cell Polyurethane Spray Foam to the crawl space ceiling. All ductwork and piping should be sprayed to prevent heat loss and to avoid freezing in the winter. By using at least an average of 2 inches of Closed-Cell Polyurethane Foam the homeowner gets an air and vapor barrier that eliminates the intrusion of cold and warm air through the floor as well as the intrusion of naturally occurring moisture and pollutants, that are present on the ground and that get sucked up into the home because of the homes stack effect. In many locations it is now code to have a minimum of 6-8 mil polyethylene vapor barrier installed on the floor of a vented crawl space so as to also help against the intrusion of moisture and pollutants from directly below the home.

 
 
Energy Star
NAHB
AIA
Earth Craft
SPFA
BPI