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

If the floors over your crawl space are cold in the winter and your energy bills feel high all year, the crawl space is usually where the trouble starts. An uninsulated or poorly insulated crawl space lets your heated and cooled air escape and pulls outside air in, so your system runs harder for a house that still never feels quite comfortable.
We have been insulating crawl spaces across New Jersey and Eastern Pennsylvania for 33 years, more than 30,000 jobs so far. Book a free home visit and we will get under the house, find where the air and the heat are getting away, and tell you what it takes to fix it.

What Crawl Space Insulation Does

Good crawl space insulation keeps your conditioned air where it belongs and keeps outside air out. That means the house holds its temperature, your heating and cooling system does not have to fight to keep up, and the floors above the crawl space stop feeling cold. It also cuts down the outside air infiltration that carries allergens and irritants up into your living space, so the air in the house is cleaner too.

The Right Insulation for Your Crawl Space

We do not use the same material for every job, because crawl spaces are not all the same. Depending on yours, we install fiberglass faced batting in a range of sizes and thicknesses, insulating foam board, and plastic sheeting, and we match the material and the approach to the space. A vented crawl space with cold floors calls for a different setup than a sealed one, and we will walk you through which fits your home and why.

Common Crawl Space Problems We Fix

Moisture and leaks

Wet insulation is useless insulation, and it turns into a mold and pest problem fast. We address the water and add a vapor barrier so the insulation stays dry and keeps working.

Cold floors

Cold floors on the level above are almost always a crawl space problem. Proper insulation under the floor stops the cold from coming up.

Rodents and pests

Insulation that pests have nested in cannot be saved. We remove the damaged material, sanitize the space, and seal the entry points before we put new insulation in.

Poor ventilation and air quality

Cutting the air infiltration also cuts the allergens and irritants that ride that air into your home, which makes a real difference for anyone in the house with allergies or asthma.

Our Crawl Space Insulation Process

1. Free home visit and inspection. We get under the house and check the insulation, the moisture, the floor, and any pest activity, then give you an honest rundown of what we find.
2. Remove the old insulation. Anything wet, moldy, or nested-in comes out. There is no point insulating over material that has already failed.
3. Handle the moisture. If the crawl space is damp, we deal with it first, with a vapor barrier and by sealing leaks, so the new insulation stays dry.
4. Seal the air leaks and entry points. We close the gaps that let outside air and pests in before we insulate, so the insulation actually does its job.
5. Install the right insulation. We put in the material that fits your crawl space, sized and placed to hold the temperature and stop the drafts.
6. Walk it with you. We show you the finished work and explain what we did, so you know exactly what you are getting.

Benefits of Crawl Space Insulation

Lower energy bills

When your crawl space stops leaking conditioned air, your heating and cooling system runs less, and that shows up on the bill month after month.

Warmer floors and steadier temperatures

Insulating under the floor is the fix for cold floors, and it keeps the whole house at a steadier temperature through the year.

Cleaner indoor air

Less outside air sneaking in means fewer allergens and irritants making their way up into your living space.

Less strain on your HVAC

A system that is not fighting a leaky crawl space works less hard and tends to last longer.

Insulation and Moisture Go Together

Insulation only works if it stays dry. Wet insulation loses its value and becomes a mold and pest problem, so if your crawl space has a moisture issue we take care of that first, with a vapor barrier or full encapsulation, and then insulate. We will tell you at the visit whether your crawl space needs moisture work along with the insulation, and we will not add work you do not need.

What Does Crawl Space Insulation Cost in New Jersey?

It depends on the size of the crawl space, the condition it is in, how much old insulation has to come out, whether there is moisture work to do first, and the material we use. We give you an exact price after the free visit, so you know what you are paying for before any work starts.

Why Homeowners Choose AtticRawl

• 33 years on attics, crawl spaces, and basements, and not much else. This is the work we know cold.
• More than 30,000 jobs 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.
• 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 across New Jersey and Eastern Pennsylvania every week.
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

What is the best insulation for a crawl space?
There is no single best answer, because it depends on whether the crawl space is vented or sealed and what shape it is in. We use fiberglass faced batting, foam board, and plastic sheeting, and we match the material to your space. We will explain our choice at the visit.
Should I insulate the walls or the floor of the crawl space?
That comes down to whether the crawl space is vented or sealed. A sealed, encapsulated crawl space is usually insulated at the walls, while a vented one is insulated under the floor. We assess which approach fits your home.
Do I need a vapor barrier too?
Usually, yes. Insulation has to stay dry to work, so in most crawl spaces we pair it with a vapor barrier or encapsulation to keep ground moisture out.
Will crawl space insulation warm up my floors?
It is the main fix for cold floors. A cold floor over a crawl space is almost always an insulation problem, and insulating under the floor solves it.
Can my old insulation be reused?
If it is dry and in good shape, sometimes. If it is wet, moldy, or pests have nested in it, no. We remove failed insulation and replace it rather than leaving a problem in the walls.
Do you offer free estimates?
Yes. Every job starts with a free home visit, no obligation, and an exact price before any work starts. Call 800-682-1602 to set it up.