What is the reasonable price for waterproofing your basement in Delaware?

Evaluation of basement waterproofing cost in Delaware per square foot

Evaluating the basement waterproofing cost in Delaware per square foot is crucial for homeowners while investing in waterproofing. 

Delaware is a place of geographical diversity. It has coastal regions with high water tables and varying degrees of precipitation. The basement waterproofing costs can fluctuate based on your specific location and the extent of damage. Pinpointing an exact cost without a comprehensive assessment can be challenging.

The average cost of fixing a basement ranges from $1500-$10,000 and the basement waterproofing cost per square foot in Delaware is $5 to $10.

When involved in this essential home improvement project, gaining insight into the factors that influence the cost can help you make a clear decision. Let’s have a look into the factors that influence these costs.

  • The extent of moisture
  • Methods and materials employed
  • The need for exterior or interior waterproofing
  • Drainage system installation
  • Foundation crack repairs
  • Location
  • Home age

In addition to these factors, it is essential to assess the reputation, experience of the contractor, and the warranties they offer.

There are some general units to measure the cost of waterproofing in Delaware. Now, we will see the pricing methods based on size, length, and time.

A common approach to calculate the Basement waterproofing cost in Delaware per square foot

Basement waterproofing cost per square foot

The average basement waterproofing cost per square foot in Delaware ranges from $5-$10.

The size of the basement affects the cost of repair. Different basement sizes have different base prices.

The table below sum up the basement sizes and their average cost of repair.

Basement sizeCost($)

Basement waterproofing cost per linear foot

The basement waterproofing cost for borders is calculated per linear foot

For example the French drain, weeping tile, and baseboard channeling along the walls are calculated by linear foot.

The cost of this kind of waterproofing falls in the spectrum of $50-$100 per linear foot.

Labor costs

Other way of calculating the cost by contractors is base price. It includes labor and material costs. The base price is $3-$6 per square foot.

Sometimes labor costs are charged per hour, which is $16-$20 per hour.

Location is the other factor that influence the cost of waterproofing. In high-cost living areas and flood-prone areas, professionals charge more for waterproofing.

To get an overall idea, we can study the cost of waterproofing basement from inside or from the outside.

Interior and Exterior basement waterproofing cost in Delaware per square foot

Let’s look into the points to be reviewed and the methods employed for basement waterproofing cost estimation.

Cost of waterproofing basement from inside

The cost of interior basement waterproofing in Delaware can vary depending on many aspects, including

  • Extent of water intrusion
  • Specific methods used
  • Quality of materials
  • Contractor’s expertise

It is not easy to provide an exact cost without assessing your specific situation.

The average cost of waterproofing basement from inside ranges from $500 to $10,000.

There are various interior basement waterproofing methods available to safeguard your home against water intrusion.

Here are these methods and their associated cost of waterproofing basement from inside.

The Interior Drainage System

French drains are the internal pipe system installed around the perimeter of the basement floor. It collects and channels water to a sump pump. The cost for this method ranges from $ 40 to $100 per linear foot.

Sump Pump Installation

Sump pumps are a crucial component of interior waterproofing. The installation cost of a sump pump ranges from $350 to $2500 per unit. The pricing differs for new pump and replacement pump.


Sealants are meant for waterproofing basement walls from the inside.


Acrylic is affordable and durable. This is susceptible to cracking if exposed to moisture over an extended period. The average cost of this method is $3-$4 per square foot.


These are the interface between Acrylic and Epoxy sealants.

They offer greater flexibility and protection against moisture.

The cost of waterproofing the basement from inside by this method may vary from $4-$6 per square foot.


This method is expensive and difficult to install. It seals the cracks in the basement walls.

Waterproofing basement walls from inside cost might fall between $5 – $7.

Waterproofing paint

This is for minor repairs and is a method for a low cost of waterproofing the basement from inside.

The cost of waterproofing paint is $1-$2 per square foot.

Dehumidification Systems

A dehumidifier is used to control the moisture level in the air. The cost of installing a dehumidification system can range from $1000 to $3000 per unit, including the equipment and installation.

Crawl Space Encapsulation

For homes with crawl spaces, the crawl space encapsulation method is used for sealing the space with vapor barriers. Prices often fall between $0.5 to $1 per square foot of the crawl space area.

Exterior basement waterproofing cost in Delaware per square foot

Exterior basement waterproofing is an effective way to prevent water intrusion from the outside.

The average cost of exterior basement waterproofing in Delaware per square foot ranges from $1 to $7.

The factors that influence the cost include

  • Specific techniques used
  • Condition of the foundation
  • The extent of excavation required

Methods of Exterior Basement Waterproofing

Excavation and Exterior French Drains

Exterior waterproofing methods involve excavation for digging exterior french drains and sealing walls.

The cost of digging and installing exterior drainage systems can range from $10 to $100 per linear ft.

Exterior Waterproof Membranes

These membranes serve to obstruct the ingress of water and come in two distinct types

  • Liquid membrane waterproofing:

Installing liquid membrane waterproofing prevents the entry of water from walls. It may cost between $3 to $6 per square foot.

  • Sheet membrane waterproofing:

In this method, foundation walls are wrapped with a membrane to prevent seepages. The cost of this technique is $3-$7 per sq. ft

Grading and Landscaping

Adjust the grading around your home to ensure that the water runs away from home. This costs around $1-$2 per square foot

Foundation Coatings and Sealants

This is an alternative method to prevent water entry from outside. Sodium bentonite is a clay material applied to seal the exterior walls. It effectively absorbs the moisture.

Applying a chemical to exterior foundation walls can cost approximately $2 to $4 per square foot.

Cost of waterproofing basement from inside vs. outside

Depending on the extent and type of damage one may need to do interior or exterior waterproofing or combine both methods.

The cost of waterproofing basement from inside may go up to $5500.

Exterior waterproofing method is expensive than the interior. This can potentially reach costs of up to $8,500.

Secondary costs associated with basement waterproofing cost in Delaware per square foot

When waterproofing your basement, it’s essential to consider not only the primary costs but also expenses that arise during the process. These additional costs can impact the budget of your basement waterproofing project. Here are some important extra costs to keep in mind:

Permits and Inspections\

Sometimes a home needs permits and inspections for waterproofing projects. These costs vary by location and may need payments to local authorities.

Besides this, if the home is old, one must plan funds for updating the building codes along with basement waterproofing

Foundation Repairs

If your basement’s foundation is damaged, it needs to be addressed before waterproofing. Repairing the foundation can be an extra cost.

Mold Remediation

If the wet basement has existing mold, you may need to invest in mold remediation services. Mold removal and remediation can be costly.

Professional Fees

Hiring a waterproofing contractor involves paying for their services including inspection, assessment, and installation. The cost may vary based on their expertise and reputation.


Certain contractors provide warranties for their work, which may necessitate an additional upfront cost. Longer warranties can provide peace of mind but may come at a higher initial price.

Finally, to avoid unexpected financial strain, it’s essential to thoroughly assess your basement’s condition. One needs to work with a reputable waterproofing contractor like Delaware Waterproofing Company. They provide a comprehensive estimate including both basement waterproofing costs and additional charges. This ensures that your waterproofing project remains on budget and effectively protects your home from moisture intrusion.

Frequently Asked Questions

What is the average basement waterproofing cost in Delaware per square foot?

The average basement waterproofing cost in Delaware per square foot ranges from $5-$10 depending on the method of waterproofing.

How much is the interior basement waterproofing cost in Delaware per square foot?

The interior basement waterproofing cost in Delaware per square foot may cost around $3 to $10.However, the cost may vary depending on location, size of basement, material, and methods used.

What is the most cost-effective way to waterproof a basement?

The cost-effective way to waterproof a basement is waterproof painting. It stops moisture from seeping through walls and costs only $1–$2 per square foot. Yet, this is a limited damp proofing that won’t seal cracks or keep more amounts of water out.

How do you waterproof basement block walls from the inside?

Once the basement is fully dry, all the holes are sealed and the doors, and windows are covered. Then it’s the perfect hour to paint the walls with a waterproof sealer.

What is the cost of waterproofing the basement from inside?

The inside basement water-proofing costs from $200 to $3,000 on average. This wide price range is for all the types of methods chosen to waterproof the basement’s interior.

One thought on “What is the reasonable price for waterproofing your basement in Delaware?

  1. Thanks for helping me understand at basement waterproofing contractors will include the inspection, assessment, and installation when it comes to the rate we will be paying them, and it depends on the expertise and reputation that your company has. In my opinion, it’s important that we hire those who have been in the industry for many years and has a good background. Because it will give us the assurance that the outcome of the project will be successful and there will be no issues in the future there can be flooding or too much rain in a day.

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