Repairing and Sealing a Basement Cost

Typical costs:

• Expect to pay $100-$300 for do-it-yourself materials to patch any cracks in your basement walls or floor, then seal the interior basement walls or floor with a sealant. In extreme cases, if the cracks and leakage problems are extensive, you might also excavate outside a problem area in a wall, install exterior footer drains and backfill the excavated area. This could bump the total do-it-yourself cost up to $300-$600 or more, especially if you rent a backhoe. A Long Island, NY homeowner^[1] spent $400 (including $300 to rent a backhoe) on a do-it-yourself project repairing three long cracks in the basement of his 3-bedroom home, sealing the interior walls and then excavating outside and sealing one exterior wall.
• Hiring a waterproofing or basement contractor to patch and seal your basement interior can run $1,000-$2,000 or more depending on the size of the basement and the extent of the cracks and leaks. If the project also includes outside excavation and drainage as well as sealing exterior walls and covering them with a moisture barrier, the total costs might average $5,000-$10,000, but can run $11,000-$15,000 or more depending on regional prices and the size of the project.

• The basement walls or floors should first be cleaned of any dirt, grease and dust. If using a cement-based sealant, the surface needs to be wet thoroughly with a fine mist before applying the sealant. Depending on the type of sealant, usually two coats will be needed. When patching cement, the hole or crack should first be widened slightly and made at least half an inch deep. Better Homes & Gardens provides illustrated instructions for repairing basement leaks, including applying interior sealant and doing outside excavation and sealing.

• Extensive landscape replacement may be needed after outside excavation; the cost will vary considerably depending on the size of the area damaged by excavation and the type of replacement plantings chosen.

• Get estimates from several companies. Be sure you understand exactly which materials will be used and what work will be done -- and how the project will fix your specific basement water problems. The contract should include a written evaluation of the problem and how it will be fixed; start and completion dates; a guarantee or warranty; and a clause that there will be no additional work down without your consent, approval and signature (to avoid unwanted add-ons or unpleasant surprises with the final bill). Ask for and check references from satisfied customers, and look for any complaints on file with the Better Business Bureau^[2] . The BBB warns against^[3] waterproofing contractors who ask for large payments in advance or don't provide a written estimate.
• The National Association of Waterproofing and Structural Repair Contractors lists things to do before^[4] calling a contractor, a checklist^[5] for hiring a waterproofing contractor and referrals^[6] to its members in each state.

1.  www.city-data.com/forum/long-island/524886-waterproofing-basement.html
2.  www.bbb.org/us/Consumer-Business-Reviews/
3.  basementhealthpros.com/
4.  basementhealthpros.com/
5.  basementhealthpros.com/
6.  basementhealthpros.com/

Check Out All Costs for Home and Garden		How Much Does Pressure Washing Cost?		How Much Does a Central Air Conditioner Cost?		How Much Does a Deck Cost?

Today's Featured Cost Articles

Is this the summer to finally take those swimming lessons? A BBQ grill could be handy with Memorial Day coming up. Spring has sprung. Are you thinking about allergy shots? Mother's Day is coming up. We cover the cost of massages and other spa treatments. April is craft month. We have the cost of scrapbooking and other crafts.

About CostHelper

CostHelper is based in Silicon Valley and provides consumers with unbiased price information about thousands of goods and services. Our writers are experienced journalists who adhere to our strict editorial ethics policy.

CostHelper Community

Portneuf medical hospital ER Paid: 210.00 they told us that the bill for the ER visit was only $210. later on we receive a bill for $1000. i got around 4-6 blood tests. all im mad about is that they lied to us... [more] -Gino Smile Blood Tests Cost Renovation ducting...never had central AC Paid: 1250.00 Renovating a guest house that never had central AC, therefore had no ducting...owner removed the ceiling as it had to be replaced anyway... [more] -CPace Ductwork Cost Flu symptoms Paid: 5932.68 Couldn’t stand headache pain when I caught the flu in March 2019. Threw up pain relievers, couldn’t eat or drink. After 5 hours of pain decided to hit ER... [more] -GayLynn Emergency Room Visit Cost Financing Paid: 20000.00 How do people afford wells? No one finances?... [more] -Kourtney Well Drilling Cost 1 yr 23lb Male Neuter Paid: 424.08 The price would have been $282.08, but I opted for the blood work and to have it done via laser versus scalpel. I was still surprised by the cost, but I didn't really have anything to compare it to... [more] -Joelle Dog Spay or Neuter Cost Is this cost of tax preparation correct Paid: 1845.00 Each year our tax preparation cost goes up faster than inflation. we started at $800.00 in 2012 and now our bill for preparing taxes this year is $1,845.00... [more] -smallbizchris Business Tax Preparation Cost