Crawl Space Encapsulation Services Serving the New Jersey Area & Eastern Pennsylvania

Most people never think about their crawl space. But a good share of the air inside your home rises up out of it, so when the crawl space is damp, that damp air ends up in your living room. Moisture down there feeds mold, draws in bugs, rots the wood your house sits on, and quietly runs your energy bills up.
Encapsulation fixes that at the source. We have been sealing crawl spaces around New Jersey and Eastern Pennsylvania for 33 years now, more than 30,000 homes so far, and our own crews handle every job from start to finish. Book a free home visit and we will get under the house, show you what is actually going on down there, and tell you straight what it takes to put it right.

What Is Crawl Space Encapsulation?

Encapsulation means sealing your crawl space off from the ground and the outside air completely. Instead of leaving bare dirt, open vents, and damp walls to soak up humidity, we line the whole space, floor and walls, with a heavy vapor barrier. Then we seal every seam and close the vents and gaps that let moist air in. What you get back is a clean, dry space instead of a dirt cellar working against your house.
People mix up encapsulation with a plain vapor barrier, but they are two different things. A vapor barrier is usually one thin sheet of plastic laid over the dirt. It is better than nothing, but the walls, vents, and seams are still wide open. Encapsulation is the full system: a thick 20-mil liner over every surface, sealed seams, closed vents, and often a dehumidifier to hold the humidity down all year. We use real 20-mil liner and professional sealant tape, not the flimsy 6-mil plastic you find on a bargain job.

Signs Your Crawl Space Needs Encapsulation

You will almost never spot the problem in the crawl space itself, because who ever goes down there. The signs show up in the house above it instead. Give us a call if any of these sound familiar:

• A musty, damp smell that lingers, especially in summer
• Sticky, humid air upstairs even with the AC running
• Floors that feel soft or bouncy over the crawl space
• Mold, mildew, or chalky white patches on the foundation walls or framing
• Bugs or mice getting into the house
• Rust or condensation on your ducts, pipes, or HVAC unit
• Energy bills climbing while your system works overtime on damp air

A damp crawl space is a magnet for anything that likes moisture. That includes cockroaches, carpenter ants, silverfish, firebrats, earwigs, millipedes, centipedes, pill bugs, sow bugs, and termites. Dry the space out and you take away what is drawing them in.

Our Crawl Space Encapsulation Process

No two crawl spaces are the same, so we look at yours before we put a price on anything. A typical job runs like this:

1. Free home visit and inspection. We come out, get under the house, and check the moisture, any standing water, the old insulation, pest activity, and the shape your framing and ducts are in. You get an honest rundown of what we find.
2. Clean it out. Out comes the debris, the old failed vapor barrier, wet or contaminated insulation, and anything else that does not belong down there. That leaves us a clean surface to work from.
3. Handle the water first. If there is standing water or a drainage problem, we deal with it before anything else, because sealing moisture in would defeat the whole point. Depending on the house, that might mean grading, a drain, or a sump pump.
4. Install the liner. We roll out the 20-mil liner across the floor and up the walls, tape every seam, and seal around the piers, pipes, and the perimeter so there is no gap for moisture to sneak through.
5. Seal the vents and control humidity. We close off the vents and gaps, and where it makes sense we add a dehumidifier or rim-joist insulation to keep humidity in check through the year.
6. Walk it with you. We show you the finished space, explain what we did, and hand back a crawl space that is clean and dry. No more crawling through mud just to check a pipe.

Benefits of Encapsulating Your Crawl Space

Healthier air upstairs

Since so much of your indoor air comes up from below, drying and sealing the crawl space cleans up the air in the rooms above it. Less humidity, less musty smell, and fewer mold spores floating around to set off allergies and asthma.

Lower energy bills

Damp air costs more to heat and cool. Seal the crawl space and keep the humidity down, and your heating and cooling system stops fighting it. It runs less, and it tends to last longer.

Moisture and mold protection

The 20-mil liner and sealed vents keep ground moisture and humid outside air out, so mold and wood rot never get the damp conditions they need to take hold.

Fewer pests

The bugs listed above are all chasing moisture. Take it away, seal the gaps, and your crawl space stops being an easy way in for insects and rodents both.

A sound structure and usable space

Keeping the framing and subfloor dry protects the bones of your house. And a sealed floor turns the crawl space into something you can actually use. You can store things down there, and a plumbing leak shows up on a clean liner instead of hiding in the mud.

Better resale value

Buyers and home inspectors notice a dry, encapsulated crawl space. It is one less thing to argue about when you sell.

What Does Crawl Space Encapsulation Cost in New Jersey?

It is the first thing most people ask, and the honest answer is that it depends on your crawl space. What moves the price the most is the square footage, how much cleanup and old material has to come out, whether there is a water problem to fix first, and whether you add a dehumidifier or insulation. A small dry crawl space is a much smaller job than a big one that needs water management and a full clean-out.
We would rather not throw out a number that turns out to be wrong for your home, so we give you an exact price after the free visit. You will know what you are paying for and why. A lot of homeowners are surprised to learn that a sealed crawl space pays some of itself back over time, through lower energy bills and by heading off the much bigger cost of moisture, mold, and structural repairs later on.

Why Homeowners Choose AtticRawl

• 33 years on attics and crawl spaces, and not much else. This is the work we know cold.
• More than 30,000 homes done, and over 65 million square feet of work behind us.
• Licensed, bonded, and insured.
• Our own crews, not subcontractors. The people who quote your job are the ones who show up to do it.
• Real 20-mil liner and professional sealant, not the thin stuff used on cut-rate jobs.
• Free home visits with no pressure, a straight assessment, and an exact price before any work starts.

Serving New Jersey & Eastern Pennsylvania

We are based at 34 Green Street, Unit B, in Woodbridge, NJ, and our crews are out at homes across New Jersey and Eastern Pennsylvania every week. If you have been typing “crawl space encapsulation near me” into Google, odds are you are already in our area.
We work all over Middlesex County, including Woodbridge, Edison, Old Bridge, South Brunswick, New Brunswick, South Amboy, and Spotswood. We also cover Monmouth County (Aberdeen, Hazlet, Holmdel, Manalapan, Manasquan), Union and Essex (Elizabeth, South Orange, Cedar Grove, Fairfield), and Bergen County (Teaneck, Ridgewood, Allendale). On top of that we serve Sussex and Morris County towns like Sparta, Andover, and Mountain Lakes, plus the Lehigh Valley over in Eastern PA, including Allentown, Bethlehem, and Easton.
Do not see your town? Call us anyway. If you are anywhere in New Jersey or Eastern Pennsylvania, chances are we cover you.

Frequently Asked Questions

How long does crawl space encapsulation take?
Most crawl spaces take one to three days. It depends on how big the space is, how much cleanup is involved, and whether there is drainage to sort out first. We give you a timeline at the free visit.
Is crawl space encapsulation worth the money?
For most homes dealing with moisture, humidity, or pests, it is. It cleans up your indoor air, brings down energy bills, keeps your framing from rotting, and heads off the much larger cost of mold and structural repairs down the line. On a damp crawl space, it is one of the better dollar-for-dollar improvements you can make.
What is the difference between a vapor barrier and full encapsulation?
A vapor barrier is one sheet, often thin 6-mil plastic, laid over the dirt floor. Encapsulation is the whole sealed system: thick 20-mil liner on the floor and walls, sealed seams, closed vents, and usually humidity control. Encapsulation lasts longer and actually solves the problem.
Do I still need a dehumidifier after encapsulation?
Sealing the space cuts the moisture way down on its own. Whether a dehumidifier is worth it comes down to your home. We will tell you honestly during the inspection instead of pushing equipment you do not need.
Will encapsulation get rid of the musty smell in my house?
Usually, yes. That musty smell is almost always damp, moldy air drifting up from the crawl space. Clean it out, seal it, keep it dry, and the smell has nowhere to come from.
Can encapsulation help with pests?
It helps a lot. Silverfish, carpenter ants, cockroaches, and the rest are all after moisture, and sealing the gaps keeps rodents out too. Take away the damp and you take away the draw.
Do you offer free estimates?
Yes. Every job starts with a free home visit, no obligation. We look at your crawl space, tell you what we find, and give you an exact price before any work starts. Call 800-682-1602 to set it up.