Crawl Space Insulation

The crawl space beneath your home is often an overlooked source of significant energy loss, moisture intrusion, and indoor air quality problems. Montebello Attic Insulation provides comprehensive crawl space insulation services, including the installation of fiberglass batts between floor joists, rigid foam board on crawl space walls, and heavy-duty polyethylene vapor barriers on the ground — or a combination of these approaches depending on your crawl space type and condition.

An uninsulated or poorly insulated crawl space allows cold, damp air to directly affect the floors above, making rooms feel cold in winter and driving up heating costs. In the greater Los Angeles area, crawl spaces can also trap moisture from ground vapor or plumbing leaks, leading to wood rot, mold growth, and deterioration of structural members over time. Properly encapsulating and insulating the crawl space addresses all of these issues simultaneously.

Our team evaluates your crawl space for existing moisture, ventilation conditions, and structural concerns before recommending a solution. For vented crawl spaces, we typically insulate the floor joist bays with faced fiberglass batts and install a ground vapor barrier. For encapsulated crawl spaces, we seal the walls and floor with a continuous vapor barrier and add rigid foam or spray foam to the perimeter walls. We work carefully in tight spaces and leave the area cleaner than we found it.