How much does it cost to seal a crack in a basement wall?

Author: Dr. Jalyn Harvey  |  Last update: Saturday, March 21, 2026

Foundation crack repair costs between $250 and $800. Some foundation cracks are minor and easy to fix. Cracks wider than ⅛ inch are a cause for concern, and hairline cracks should be repaired to prevent additional water damage.

How much does it cost to fix a crack in a basement wall?

Basement repair

Get free estimates from foundation repair contractors near you. Basement foundations are the most complex type to repair. Minor repairs cost $500 to $2,000 to fix small cracks that don't require excavation. Major repairs cost $2,500 to $25,000 for larger cracks, severe leaks, and bowed walls.

Should basement cracks be sealed?

No matter what has caused the foundation to crack, or whether it is moving or static, the crack should be sealed. Sealing the crack correctly will preserve the integrity of the wall and also prevent water from entering into the space within.

How much does it cost to seal basement walls?

Basement waterproofing costs $5,213 on average, and most homeowners pay somewhere between $2,459 and $8,181 depending on the waterproofing method, the extent of the issue, and the size of the home.

How much does it cost to seal a crack?

Typical costs for crack sealing can range anywhere from . 35¢ to $1.00 per linear foot depending on materials and methods used.

The ultimate foundation crack fix that actually works! WINNI

How much does epoxy basement crack repair cost?

There are two ways to repair foundation cracks with epoxy: DIY epoxy repair kits or hiring a professional foundation contractor. Costs for repair DIY kits range from $75 – $225, while hiring a foundation contract will cost $500 – $2500, depending on the cracks.

Does sealing concrete stop cracks?

Can Sealing Prevent Cracks on Concrete Surfaces? Concrete sealing can stop most types of concrete fractures. This fact is especially true if the crack is a result of poor-quality work in the concrete mix or site preparation. However, sealing can prevent future damage that may start from the top layer of the concrete.

What is the cheapest way to seal a basement?

Which is the cheapest basement waterproof? The cheapest basement waterproofing method is typically applying a waterproof paint coating, which can cost as little as a few dollars per square foot for materials if doing it yourself. Caulking cracks and opting for interior solutions is cheaper than exterior excavation.

How do I seal my basement wall from inside?

Apply a masonry waterproofing product to the walls

Seal/coat the interior of the walls with a suitable masonry waterproof product. When the paint dries, the sealant forms a watertight bond to stop water from seeping through. This is how you can waterproof your basement walls from inside.

How long does basement sealing last?

Most modern waterproofing solutions last about 10 years, so basement waterproofing as a whole lasts about that long as well. Even better, Groundworks has basement waterproofing solutions that last longer, and come warrantied in case of an emergency.

How serious are cracks in basement walls?

Hairline cracks in mortar are not usually a big problem, but stair-looking cracks in the mortar joints are concerning, Moderate and major cracks in the foundation walls will also sometimes lead to warning signs throughout the house.

What is the best concrete crack sealant?

Our best overall pick is the Sika Sikaflex Pro Select Self-Leveling Sealant because it's easy to use and self-leveling. We also like that it's durable and weather-resistant, dries to a waterproof finish, can be painted, and works to fill cracks up to 1.5 inches wide.

Is it bad to seal your basement walls?

In conclusion, exterior and interior basement waterproofing are both effective methods of protecting your home from water damage. Exterior waterproofing creates a barrier that prevents water from entering your home, while interior waterproofing redirects water that does enter your home.

What is the best way to seal cracks in basement walls?

Basement wall repairs are best done with a caulking gun and an epoxy-based resin. To heal most cracks, particularly those in the mortar between concrete block, you can place the tip of the tube of epoxy into the crack and squeeze the trigger to apply the sealant.

How much does it cost to repair a crack in concrete?

Patching or Sealing Cracks

Professional crack repair could cost as little as $100 for a few smaller cracks and between $500 - $1,000 for more extensive crack repair around the entire driveway.

Does a crack in the wall mean foundation problems?

While some cracks in your wall can be solely cosmetic, others can indicate foundation issues. Structural cracks in walls are serious and should be repaired immediately, so it's important that homeowners know how to identify them.

Why not use Drylok on basement walls?

Drylok is an indoor waterproofing paint, and while that has been mentioned several times, it is a crucial detail. Waterproofing your basement from the inside may be cheap, but it is by far the least effective way of waterproofing your basement, and this is because it never stops the source of the water.

How much does waterproofing a basement cost?

While exterior waterproofing costs tens of thousands of dollars, interior waterproofing costs between $4,000 and $10,000. Some of the biggest cost-indicators are: Labor.

Can I use flex seal in my basement?

Apply Flex Seal Products

Flex Shot and Flex Seal Liquid are great options for attacking a basement wall leak.

How much does it cost to seal a 1000 sq ft basement?

The average cost to waterproof a 1,000-square-foot basement is $3,000-$10,000, depending on the location and method used. Interior sealing is often less expensive than exterior sealing but is less effective at keeping water completely out of the basement.

What is the best waterproofing method for a basement?

The most common basement waterproofing methods include:
  • Exterior waterproofing coating.
  • Interior sealants.
  • Interior water drainage.
  • French drains (interior and exterior)
  • Sump pump installation.

What is the most expensive part of finishing a basement?

A: One of the most expensive parts of finishing a basement is doing foundation repairs and any waterproofing, electrical work, and additional framing or insulation.

How do you permanently fix cracks in concrete?

Narrow cracks can be filled with a masonry concrete crack filler that comes in a cartridge designed to be used in a caulking gun. Alternatively, you can create a concrete patch with a vinyl concrete patching compound applied and smoothed with a putty knife.

Is concrete sealing worth it?

Concrete is incredibly durable, but if it isn't sealed properly, it can chip or show wear in certain situations. A quality, professionally installed sealant reduces wear and tear, thereby extending the life of your concrete driveway.

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