Crawl Space Waterproofing in Montgomery, AL

Water intrusion in a crawl space is more than a nuisance—it rots floor joists, grows toxic mold,

and destroys insulation. Crawl space waterproofing in Montgomery, Alabama involves a

combination of exterior drainage, interior perimeter drains, and vapor barriers to keep your

crawl space dry year‑round.

How Water Enters Montgomery Crawl Spaces

Water finds its way under your home through several paths. Poorly functioning gutters dump

water directly against the foundation. Downspouts that are too short allow water to pool near

the crawl space. Negative yard grading—where the soil slopes toward the house—creates an

ideal path for runoff. In some cases, the water table rises after heavy rain, pushing water up

through the crawl space floor. Montgomery Foundation Repair Co inspects each of these

potential entry points before designing a waterproofing plan.

Exterior Solutions: Gutters, Downspouts, and Grading

The first line of defense is keeping water away from the foundation. Montgomery Foundation

Repair Co will check that your gutters are clean and properly sloped, with downspouts

discharging at least 10 feet from the house. We may recommend extending downspouts with

flexible drains or adding splash blocks. For grading issues, we can regrade flower beds and

install swales to direct runoff around the home. In severe cases, an exterior French drain (a

perforated pipe in a gravel trench) intercepts water before it reaches the foundation. These

exterior measures cost less than interior work and are always worth trying first.

Interior Perimeter Drain Systems

If exterior solutions are insufficient or impractical, an interior drain system is the most reliable

waterproofing method. Montgomery Foundation Repair Co cuts a channel along the inside

perimeter of the crawl space, installs a perforated drain pipe in a gravel bed, and covers the

channel with concrete or a drainage mat. Water that seeps through the foundation walls or up

through the floor enters the drain and flows to a sump pump basin. The sump pump then

ejects the water to daylight or a storm drain. This system works even when the water table is

high because it actively removes water from beneath the crawl space floor.

Combining Drainage with Vapor Barriers and Encapsulation

Waterproofing alone does not control humidity. After eliminating liquid water, Montgomery

Foundation Repair Co installs a heavy vapor barrier over the crawl space floor. For full crawl

space encapsulation, we seal the barrier to the foundation walls, cover the walls as well, and

add a dehumidifier. This combination stops both liquid water and water vapor, creating an

environment where humidity stays below 55 percent. Without the vapor barrier, moisture rising

from damp soil would still rot your floor joists, even if standing water is gone.

Frequently Asked Questions