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Should you repair basement leaks from the inside or the outside?

repair basement leaks, crack repair, basement leaks RichmondAt Basement Masters Waterproofing one of the most common questions our Virginia and Maryland homeowners ask is, “Is it better to repair basement leaks from the inside or the outside?” One of the reasons they ask is because the advice from the internet often differs from that of basement waterproofing professionals.

Most basement leak repairs, regardless if they are performed on brick, cement block, or concrete foundations, can be performed from the inside or the outside of the home. If you have a poured concrete foundation, both interior and exterior waterproofing repairs can be effective in preventing a wet basement. Exterior leak repair can be more desirable and less costly under a limited number of following circumstances:

  • The cost and time of removing and replacing interior walls and furnishings, such as wood paneling and built-in bookcases or a brick fireplace are prohibitive.
  • Excavation work is required anyway to repair a bowed wall, add or repair external drainage systems, or correct composition, voids, or grading with the soil surrounding the foundation.

However, in the majority of cases, interior waterproofing is more effective and efficient than doing exterior excavation, wall repair, and replacement of soil, utility lines, drainage systems, decks, and landscaping.

Why Interior Repair is Usually a Better Approach

crack repairWet basements can be caused by a number of problems. From our experience, the best approach to a leaky basement comes from the inside.

It takes less time

It takes a great deal of time and effort to remove and replace the soil, exterior drainage systems, decks, fences, landscaping, and utility lines outside of foundation walls. There is also an increased risk of damaging tiles, utility lines, root systems, requiring additional time to repair them.

It is less expensive

Injecting into an interior crack may cost several hundreds of dollars, but removing and replacing soil and landscaping may cost several thousand. Also, there is less risk of additional costs for repairing and replacing damaged tiles, utilities, fences, decks, and landscaping.

It can be done during any weather

Exterior work cannot be done when the ground is frozen or wet. Also, it requires an entire crew to be scheduled during dry weather. Work on other projects may delay their ability to work on yours. An interior crack injection can be performed during any weather and requires only one person.

It detects the source of the leak

If the problem isn’t visible on the inside walls, you can’t be certain of the source of the water. From the outside, there could be any number of rod holes leaking. The only way to know the exact source of the leak is to observe the entire interior wall from the inside.

It repairs voids in the wall

Injecting a polymer into cracks in foundation walls actually fills the voids all the way through the wall while exterior repair only patches the outside.

It lasts longer than concrete patches

Concrete patches will eventually crack and leak due to the same conditions in the soil that caused the leak in the foundation in the first place. Polymers are waterproof and expand and contract during changes in temperature.

It is less dangerous

Anytime crews dig a hole on the outside of a foundation wall, there is always an increased risk that the soil will cave in or there may be another type of mishap on the excavation site.

Quality of the Repair Depends on the Person Doing It

crack injections for crack repair in VirginiaFrom a warranty standpoint, whether the leak repair is done from the inside or outside doesn’t matter. Both methods are commonplace in the industry, and if exterior repairs weren’t effective, those contractors would be out of business.  Like anything else, the quality of the work is the best determinant of the success of a repair.

What is most important is the skill and attitude of the waterproofing professional working on your basement leak. They must be able to make an accurate diagnosis of the problem and repair the leak without taking any shortcuts. The reputation of the contractor and personal testimonials are often the best way to judge who will do the best job of fixing your basement leak.

Angie’s List Recommends Basement Masters Waterproofing

Basement Masters Waterproofing has won Angie’s List Super Service Award for Outstanding Customer Service 5 years in a row. When you hire us, you have the assurance that you are hiring the best basement waterproofing contractor in the Northern Virginia and Maryland area. We don’t simply stand on our reputation, we are committed to providing the best products and services to every customer we serve.

If you have a leak in your basement, call Basement Masters Waterproofing for a no-cost estimate by our “Crack Crew”. We will provide you a fair estimate and repair your basement’s leak to your complete satisfaction. Contact us today!





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