Arlington Heights Basement Waterproofing

Basement Waterproofing in Arlington Heights, IL

Arlington Heights is full of split-level homes built on heavy clay soil. That combination leads to step cracks, leaking walls, and wet basements. A-Proseal fixes it for good.

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The Problem in Arlington Heights

Split-Level Homes and Clay Soil Are a Bad Mix

Arlington Heights has thousands of split-level homes built during the 1960s and 1970s. These homes have foundations that sit at two or three different heights. Where those levels meet, the concrete steps down. That step is one of the weakest spots on the entire foundation. Clay soil pushes hardest right at that point, and over time, cracks form along the step.

The clay soil in Arlington Heights is the same heavy Cook County clay found across the northwest suburbs. When it rains, this clay holds water like a sponge. It swells up and pushes against your basement walls from the outside. When dry weather comes back, the clay shrinks and pulls away. That back-and-forth cycle happens with every storm. Each time, the cracks get a little wider and a little more water gets inside.

Neighborhoods near downtown Arlington Heights, the Rand Road corridor, and the areas around Randhurst Village all sit on this same type of soil. Homes along Arlington Heights Road, near Frontier Park, and in the older subdivisions near Mount Prospect border are some of the hardest hit. If your home was built between 1955 and 1985, your foundation has been dealing with this pressure for 40 to 70 years.

The good news is that we have been solving this exact problem since 2000. A-Proseal has waterproofed hundreds of split-level and bi-level homes across Arlington Heights. We know where the weak spots are. We know how the clay behaves. And we know how to stop the water for good.

We offer free same-day inspections for Arlington Heights homeowners. We come out, look at your basement, show you what we find, and give you a written estimate. There is zero pressure and zero obligation. We also offer 0% financing so you can fix the problem right away without worrying about the cost.

Arlington Heights by the Numbers

75K+ Residents
60s-70s Peak Home Building Era
40-70 Years of Soil Pressure
36" Avg Annual Rainfall
GROUND LEVEL CLAY SOIL CLAY SOIL CLAY SOIL BELOW UPPER LEVEL LOWER LEVEL PRESSURE PRESSURE STEP CRACK (water entry point)

Split-level foundations have a step where the two levels meet. Clay soil pushes hardest at this weak point, causing cracks that let water in.

Warning Signs

Signs Your Arlington Heights Basement Needs Help

1

Diagonal Cracks at the Foundation Step

Where the upper and lower levels of a split-level home meet, the foundation steps down. Cracks that run at an angle from this step are a clear sign that clay soil is pushing too hard against the wall.

2

Water on the Lower Level Floor After Rain

The lower level of a split-level sits deeper in the ground. That means more soil touching the walls and more pressure from groundwater. If you see puddles or dark stains on the floor after a storm, water is getting in through the slab or the wall-to-floor joint.

3

Musty Smell That Will Not Go Away

A basement that always smells damp or earthy usually has a moisture problem. In Arlington Heights, this often means water is slowly seeping through the foundation walls. Even if you cannot see the water, the smell tells you it is there.

4

White Powder on Basement Walls

That chalky white film is called efflorescence. It shows up when water moves through the concrete and leaves mineral deposits behind on the surface. It means water is pushing through your foundation walls on a regular basis.

5

Doors or Windows That Stick

When clay soil pushes unevenly against a foundation, the walls can shift slightly. In a split-level home, this often shows up as doors that suddenly stick or windows that are hard to open. The house is telling you something is moving that should not be.

6

Mold Growing in Corners or Along the Baseboard

Mold needs moisture to grow. If you see dark spots in the corners of your basement or along the bottom of the walls, there is more water in your basement than there should be. This is both a health concern and a sign that your foundation is letting water through.

Every Day You Wait, the Cracks Get Bigger

Water damage does not fix itself. The clay soil around your Arlington Heights home keeps expanding and shrinking with every rain. Each cycle makes the cracks wider and lets more water in. A free inspection takes about an hour and tells you exactly what is going on. There is no cost and no obligation.

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Our Process

How We Waterproof Arlington Heights Basements

Step One

We Come Out and Look

We visit your Arlington Heights home and examine the entire foundation. We check every wall, the floor, the step where levels meet, and the area outside. We map where the water enters and measure how much pressure the clay soil is putting on your walls. You see everything we find. The visit is free and takes about an hour.

Step Two

We Make a Plan

Every split-level home is different. We build a plan based on your home's layout, the depth of each level, where the cracks are, and how the clay soil behaves around your property. You get a written estimate that explains every part of the job in simple terms. No surprises and no hidden fees.

Step Three

We Get to Work

Our crew installs drain tile along the footer, seals the step crack and any other entry points, and puts in a sump pump sized for your home. We test the full system before we leave. Then we hand you your warranty paperwork. Most Arlington Heights projects finish in one to three days. Your basement stays dry from that point forward.

What You Get

Complete Protection for Your Arlington Heights Home

Drain Tile and Sump Pump System

We install perforated drain pipe in a gravel bed below your basement floor. It captures water before it can reach the surface. The pipe connects to a heavy-duty sump pump that moves the water out and away from your home. For split-level homes, we run the drain tile along both levels so every part of the foundation is protected. Battery backup is included so the system keeps running during storms and power outages.

Step Crack Repair and Wall Sealing

The step where your split-level changes height is the most common leak point. We seal it with professional-grade epoxy and expanding polyurethane foam that fills the entire crack from the inside out. We also seal any other wall cracks, floor joints, and tie rod holes we find. A vapor barrier goes on the wall surface to block moisture that tries to pass through the concrete itself.

Lifetime Warranty That Transfers

We back every waterproofing job with a written warranty that covers the work for the life of your home. If water ever comes back through an area we treated, we come back and fix it at no cost. The warranty transfers to the new owner if you sell your Arlington Heights home. That gives buyers confidence and adds real value when you go to close.

A-Proseal crew waterproofing a basement in Arlington Heights
25+
Years Experience
5,000+
Projects Done
5.0
Star Rating
Why A-Proseal

Why Arlington Heights Homeowners Call Us

We have been fixing basements across the northwest suburbs for over 25 years. We know the soil. We know the homes. And we do honest work at a fair price.

Split-Level Specialists
We have waterproofed hundreds of split-level and bi-level homes. We know where the weak spots are and how to fix them.
Our Own Trained Crews
We never send subcontractors. Every person on your job is part of our team and trained on clay soil waterproofing.
Same-Day Inspections
Call in the morning and we can usually be at your Arlington Heights home that same afternoon. No waiting days or weeks for an appointment.
Clear Written Estimates
You see exactly what the job includes and what it costs before we start. No hidden fees. No surprise charges when we finish.
0% Financing Available
We offer flexible payment plans so you can fix the problem now. Money should not be the reason you let water damage get worse.
BBB Accredited, A+ Rated
We have been a Better Business Bureau member since 2000 with a perfect A+ rating. That track record matters when you are picking someone to work on your home.
Common Questions

Questions Arlington Heights Homeowners Ask Us

Why do split-level homes have more basement water problems?

Split-level homes have foundations at two or three different heights. Where the levels change, the concrete steps down. That step creates a weak spot in the wall. Clay soil pushes hardest right at that point because the wall is thinner and less supported. Over the years, cracks form along the step and water finds its way through. The lower level also sits deeper underground, so it faces more water pressure from the soil on all sides.

Can I just seal the cracks from the inside and skip the drain tile?

Sealing cracks helps stop active leaks, but it does not solve the root problem. Clay soil keeps pushing water against your foundation from the outside. If you seal one crack, the water pressure just moves to the next weakest spot. A complete fix needs both crack sealing and a drainage system. The drain tile relieves the pressure so the water has somewhere to go. The crack sealing stops the leaks at the current entry points. Together, they give you long-term protection.

How long does waterproofing take for a split-level home?

Most split-level homes in Arlington Heights take one to three days. The exact time depends on how many levels need drain tile, how many cracks need sealing, and whether we also need to install or replace a sump pump. We will tell you the expected timeline during your free inspection so you know what to plan for. Our crews work clean and fast, and we protect your floors and belongings throughout the job.

My home was built in the 1960s. Is it too late to waterproof?

It is never too late. In fact, homes from the 1960s are the ones that need it most. After 60+ years of clay soil pressure, the foundation has been through thousands of wet and dry cycles. The good news is that the concrete itself is usually still strong. What fails is the waterproofing. Most homes from that era had no interior drainage at all. Adding a modern drain tile system and sump pump gives an older foundation the protection it should have had from the start.

Will waterproofing increase the value of my Arlington Heights home?

Yes. A dry basement with a transferable warranty is a big selling point for buyers. In Arlington Heights, home inspectors always check for water damage. If they find signs of moisture, it can lower your sale price or cause buyers to walk away. Having a professional waterproofing system already in place removes that concern. The warranty transfers to the new owner, which gives them peace of mind and saves them from having to do the work themselves.

How soon can you come to my Arlington Heights home?

We can usually visit the same day you call. Our crews work across the northwest suburbs regularly, so we are always nearby. The inspection is completely free. We look at your basement, explain what we find, and give you a written estimate before we leave. There is no pressure to make a decision on the spot. Take your time and call us when you are ready.

Do you offer financing for Arlington Heights homeowners?

Yes. We offer 0% interest financing options so you can fix the problem now and pay over time. Water damage gets worse the longer you wait, so we do not want money to be the reason you put it off. We will go over all the payment options during your free inspection. There is a plan that works for most budgets.

Get a Free Basement and Foundation Inspection Today

Water and foundation problems get worse the longer you wait. Call us or fill out the form and we will come out the same day. No cost, no pressure, no obligation.

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(847) 525-7394