For pier-and-beam and raised floors
Crawl Space Insulation & Encapsulation in Shreveport, LA
Keep humid air and ground moisture out from under the floor.
- Free on-site estimates
- Written quote naming foam type, thickness and R-value for each area
- Moisture and air leaks checked before anything gets covered
What Is Under the Floor Matters Here
Crawl space insulation and encapsulation deal with a problem the north Louisiana climate makes worse: humid outdoor air and damp ground meeting the cool underside of a house. Shreveport gets about 51 inches of rain a year and averages 72% relative humidity. When that air gets pulled through open foundation vents into a crawl space cooled by the floor and ducts above, moisture can condense on the wood, the ducts and the insulation. Sagging, wet batts, musty smells and cupping floors are the usual results.
Two ways to handle a crawl space
A vented crawl space can work if the ground is covered with a vapor barrier, the floor above is insulated and air sealed, and the ducts down there are sealed and insulated. DOE recommends about R-13 for an uninsulated floor in Zone 2. The other approach is encapsulation: lay a heavy vapor barrier over the ground and up the walls, seal the vents, insulate the walls rather than the floor, and dry the space with conditioned air or a dehumidifier. Encapsulation costs more, but it is the more reliable fix in a damp crawl.
Why closed-cell foam on the walls
When a crawl space is sealed, the insulation moves from the floor to the foundation walls and rim joists. Closed-cell foam fits there because it sticks to block and wood, slows vapor at typical thickness, and does not soak up water. The Louisiana code minimum for crawl space walls in Zone 2 is listed as R-0 in the Insulation Institute summary, so insulating the walls is about comfort and moisture, not a code requirement.
Before we seal anything
We check for standing water, plumbing leaks, termite or rot damage, and grading or gutters that send water under the house. A crawl space should be dry before it is sealed. If it needs drainage, pest work or wood repair first, we tell you.
Signs your crawl space needs work
A musty smell in the house, floors that feel cold in winter or soft in places, insulation hanging down, ducts sweating, or high indoor humidity even with the AC running. Get a free estimate
What This Covers
Pieces we combine depending on whether the crawl stays vented or gets sealed.
Ground vapor barrier
Heavy polyethylene laid over the soil, lapped and taped, to cut the moisture coming up from the ground.
Full encapsulation
Barrier over the ground and up the walls, sealed seams and piers, with vents closed.
Vent sealing
Closing foundation vents when the crawl is sealed and dried by other means.
Closed-cell wall foam
Foam on foundation walls and rim joists in a sealed crawl.
Floor insulation
Insulation between floor joists, air sealed and supported, in a vented crawl.
Wet insulation removal
Pulling out sagging, soaked or moldy batts before new work goes in.
Typical Crawl Space Costs
| Job | Range and source |
|---|---|
| Crawl space encapsulation | $3 to $10 per sq ft, $3,000 to $15,000 (HomeGuide) |
| Crawl space vapor barrier | $1,200 to $4,000 (HomeGuide) |
| Closed-cell on crawl space walls | $2 to $5 per sq ft (HomeGuide) |
| Crawl space vent sealing | $150 to $450 (HomeGuide) |
| Crawl space, spray foam | $2,000 to $4,000 (HomeGuide); $1,000 to $5,900 (Fixr) |
| Rim joists, spray foam | $2,000 to $2,500 (HomeGuide) |
Sources are HomeGuide's 2026 guides to crawl space encapsulation and spray foam, plus Fixr (2025), all national. Crawl height, wall area, access, drainage and any cleanup drive the total. The number on our written estimate is the price you pay.
How a Crawl Space Job Runs
1. Crawl inspection
We check moisture, leaks, wood condition, ducts, vents and access.
2. Plan and quote
Vented or sealed, with materials, thickness and price in writing.
3. Clean out
Old wet insulation and debris come out, and the ground gets leveled where the barrier goes.
4. Barrier and insulation
The vapor barrier goes in, vents are sealed if planned, and walls or floor get insulated.
5. Walk-through
We show you photos of the finished space and explain how to keep it dry.
Why Choose Us for Crawl Space Insulation & Encapsulation
Moisture first
Leaks and drainage problems get flagged before anything is sealed.
Photos of the work
You see the crawl before and after, since most people never go down there.
Vented or sealed, explained
We tell you which approach fits your house and why.
Crawl Space Insulation & Encapsulation Questions
Do I need to encapsulate my crawl space in Shreveport?
Not always. If the crawl is dry, a good ground vapor barrier plus a sealed, insulated floor can be enough. If it is damp, smells musty or the floor insulation keeps falling, encapsulation is usually the more reliable fix.
Can I just add a dehumidifier?
A dehumidifier works in a sealed crawl space. In a vented one it ends up trying to dry outdoor air, which does not work well. Sealing comes first.
Why is my floor insulation falling down?
Often the batts have soaked up moisture from humid air and gotten heavy, or the supports were never installed. Wet batts should come out rather than be pushed back up.
What R-value should crawl space floors have?
DOE recommends about R-13 for an uninsulated floor in Climate Zone 2. In a sealed crawl, the walls get insulated instead of the floor.
Crawl Space Insulation & Encapsulation Service Areas
- Spray Foam Insulation in Shreveport, LA
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Get a Crawl Space Insulation & Encapsulation Estimate
We go under the house and tell you what it needs in writing.