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To say that waterproofing a basement can be a significant expense is an understatement. This project is notorious for change orders and budget overruns. It often has many moving parts and involves various unknowns, causing the initial estimate to balloon as the job progresses. Understand why basement waterproofing projects usually cost more than you expect from real estate and home improvement experts.
These factors influence the scope of the work, which ultimately determines how expensive the job can be.
The amount of materials needed to protect the concrete from dampness and the kind of equipment required to effectively drain water from your space depend on your basement’s size.
While you can partially waterproof your space, it’s not an ideal long-term solution. The uncovered areas remain susceptible to moisture, compelling you to spend again to repair the damage and deal with the same expenses twice.
Exterior waterproofing projects entail excavation, a costly activity. The deeper your basement, the more earth must be moved to dig adequate trenches to stop water from outside sources from getting in.
The structure of your foundation and the materials used to build it can complicate the project. For instance, block foundations are more prone to stair-step cracks along the mortar joints and leakage, unlike poured concrete foundations.
According to Proven Home Buyers, which buys and flips or rehabs fixer-uppers in Ohio, repairing or waterproofing a foundation in the state costs anywhere from $3,500 to over $35,000. This cost range highlights how the design alone can spell a difference between four-figure and five-figure projects.
For instance, sloped land necessitates a complex foundation system, and historic houses require specialized trades to keep them in good repair without jeopardizing their significance.
In most cases, interior waterproofing solutions are more affordable than their exterior counterparts. That’s because the former generally treat the symptoms while the latter typically cures the disease.
Moreover, physical obstructions add cost. BVM Contracting, which specializes in renovations, additions and new builds in Toronto, emphasizes that access constraints, such as air conditioning equipment sitting against the foundation wall, porches extending over footings and driveways running tight to houses, inflate the cost.
“Exterior waterproofing would require hand digging around obstacles, rerouting utilities and potentially damaging existing structures,” the contractor says, which is why it can run up to $15,000 — $10,500 more than the low end of interior waterproofing costs.
Any case of water intrusion requires urgent action. However, the interventions for flooding cost considerably more than those for minor seepage. The more expansive the affected area, the greater the prep work needed.
Sometimes, hiring a credentialed contractor is optional, which may help lower your basement waterproofing costs. However, complicated tasks that require specialized trade contractors may be off-limits to do-it-yourselfers.
Labor accounts for the lion’s share of the job cost, along with materials. If you must use a professional, then you can’t rely on sweat equity to save money.
Contractors in flood-prone states, such as New Jersey and Louisiana, charge a premium since the demand for their services is typically high. Basements built in rocky ground cost more to waterproof because the project requires specialized earthmoving equipment.
In addition to higher excavation costs, areas with clay-rich soil make root barriers indispensable. Dallas-based foundation contractor Granite Foundation Repair explains that “clay is extremely sensitive to changes in moisture,” causing clay particles to expand and contract by as much as 8 to 12 inches.
Strictly speaking, root barrier installation is not a basement waterproofing method. Still, it’s a necessary expense if your house sits on clay, as it helps preserve the structural integrity of its foundation.
Budgeting for basement waterproofing is challenging, as it often throws a curveball. Thinking of all the contingencies you may encounter is one thing, but predicting how they can veer you away from the original plan is another.
These are the most common hidden expenses homeowners encounter when waterproofing their basements:
These so-called hidden expenses often stem from poor foresight and insufficient planning. This project may affect other parts of your house, so look beyond your basement to anticipate potential contingencies and budget for them accordingly. Do what you can on your own to save on labor, and request multiple estimates when you need to hire a contractor to get the most value for your money.
