Crawl Space Sealing in Greater Richmond

Why a Sealed Crawl Space is the Way to Go

Research results indicate that a sealed crawl space is a great moisture control strategy with impressive energy saving potential, as reported by Advanced Energy.

As opposed to what many building scientists believed years ago, new research has shown that vented crawl spaces create the perfect environment for mold growth, wood rot, insects and moisture problems.

A sealed crawl space is the perfect defense against these detriments, and has proven to also create a healthier living environment and reduce energy costs.

Get a Free Quote!

Before and After

Before

After

Crawl Space Encapsulation in Bruington, VA

This Bruington, VA client contacted us about repairing moisture damage in their crawl space. Moisture had caused mold and mildew growth, was absorbed in the insulation which held it against the floor joists, the material began to delaminate and fall away from the floor.

All debris and insulation was removed from the crawl space, microbial growth was treated, the vents, sill plate, & rim band were sealed, the foundation walls were insulated with closed cell spray foam insulation and a dehumidifier was installed to control the relative humidity. The homeowners no longer need to worry about moisture damage in their crawl space and have the added benefit of warmer floors in the winter and reduced drafts in the home.
Before

After

Encapsulating a Henrico, VA Crawl Space

We met this homeowner at a home show, where they asked us to come to inspect their crawl space because they were interested in encapsulating it due to moisture and mildew-mold concerns. This section of the crawl space is under an addition. The vapor barrier is unsealed, allowing moisture to rise from the ground and contribute to high relative humidity. Microbial growth is beginning on the floor joists and the fiberglass insulation is beginning to sag and fall.

The old materials have been removed, vents sealed, and the sill plate and rim band have been sealed as well. The CleanSpace vapor barrier has been installed with all seams overlapped and sealed. The moisture barrier is also run up the walls 6-8 inches above outside grade. The walls are prepped for spray foam insulation to be applied.
Before

After

Sealing and Insulating a Crawl Space in Henrico, VA

A homeowner in Henrico, Virginia called us out to insulate and seal their crawl space from any outside influence. We installed a heavy-duty CleanSpace vapor barrier over the dirt floor, wrapped it around all piers, and mechanically fastened it to the foundation walls. This will help to keep the earth's moisture from rising into the area and increasing the relative humidity. We also covered any open vents and applied a spray foam over the foundation walls, which at an inch and a half thick will act as an air barrier and vapor retarder. With the walls and dirt flooring sealed and insulated, the crawl space will be less affected by outside air and moisture.

View More Photos

How a Sealed Crawl Space Works:

First, any outside moisture entering the crawl space is eliminated. Rainwater is prevented from entering the crawl space with the use of gutters and downspouts.
A foundation drain system is then used to control ground water. If the outside grade is higher than the the inside grade, waterproofing the exterior of the foundation is done.
Next moisture from the ground is eliminated. A heavy-duty crawl space vapor barrier is used to cover the soil floor, walls and pilings.(Read more about crawl space moisture control here).
All openings to the foundation exterior are sealed, and gaskets are installed around access doors.
Insulation is applied to the foundation walls, band joists and access doors.
Finally, a dehumidification system is installed to reduce the levels of humidity in the air and remove moisture in your crawl space.

Since the natural airflow in a home is from bottom to top, the air that is circulated back into the home from the sealed crawl space will be clean, dry air, creating a healthier environment.

Additionally, the air circulating back into the home is now conditioned air, reducing the need to heat or cool it, resulting in lower energy costs.

Looking for a price? Get a no cost, no obligation free estimate.