Keep Your Basement Dry —
Certified Waterproofing Solutions

The Real Cost of a Wet Basement

Water in your basement is never "just a little water." Even minor moisture intrusion creates conditions for mold growth within 24–48 hours. Over time, chronic basement moisture leads to:

• Mold and mildew growth (remediation costs: $2,000 – $6,000)
• Structural wood rot in floor joists and support beams
• Foundation wall cracking and deterioration from water pressure
• Damage to belongings, HVAC equipment, and electrical systems
• Reduced property value (homes with water issues sell for 10–25% less)
• Health issues from mold exposure, especially for children and those with respiratory conditions

Addressing basement water problems early is almost always less expensive than dealing with the consequences of ignoring them.

Interior Drain Tile Systems

Interior drain tile — also called a French drain or perimeter drain system — is the most common basement waterproofing approach. A perforated pipe is installed in the concrete floor around the interior perimeter of the basement. Water that seeps through the walls or floor flows into this pipe and is routed to a sump pit.

Best for: Most basement water infiltration problems, existing homes where exterior excavation isn't feasible.

Typical cost: $8,000 – $20,000 for a full perimeter installation.

Timeline: 2–3 days for a typical basement.

Sump Pump Systems

A sump pump is the active component of most interior waterproofing systems. Installed in a pit at the lowest point of the basement, it automatically pumps water out when the pit fills to a set level.

Key components of a reliable sump pump system:

• Primary sump pump: Electric pump that handles normal water accumulation. Most rated 1/3 or 1/2 HP; sufficient for most homes.
• Battery backup pump: Activates when power fails (often when you need it most — during storms). Essential for areas with frequent flooding or heavy rain.
• Water-powered backup pump: Uses municipal water pressure to operate without electricity. Excellent redundancy for severe weather.
• Alarm system: Notifies you if the primary pump fails or the water level rises unexpectedly.
• Discharge line: Routes pumped water away from the home — ideally at least 10 feet from the foundation at a lower grade.

Typical cost: $500 – $1,500 for pump installation; $300 – $800 additional for battery backup.

Vapor Barriers

Even when standing water is controlled, basement walls and floors can transmit moisture vapor — contributing to humidity, musty odors, and mold conditions. A vapor barrier is a thick plastic membrane installed against the walls and sometimes the floor to block moisture transmission.

• Wall vapor barriers (6–20 mil polyethylene sheeting) are installed over foundation walls and sealed at the floor
• Floor vapor barriers are used in crawl spaces and unfinished basements
• Some contractors install dimple mat systems that allow any water behind the barrier to flow down to the drain system

Typical cost: $1,500 – $4,000 for wall vapor barrier installation.

Wall Waterproofing Treatments

For foundation walls that show seepage through cracks or porous concrete, contractors apply waterproofing treatments:

• Crack injection: Polyurethane or epoxy injected into foundation wall cracks seals them from the inside. Best for isolated crack repair. Cost: $200 – $500 per crack.
• Hydraulic cement: Applied to actively leaking cracks and gaps; sets fast even with water present.
• Masonry waterproofing coatings: Crystalline waterproofing compounds penetrate the concrete and block water passage. Applied with a brush or spray. Cost: $500 – $2,000 per wall.
• Exterior membrane: Applied to the exterior of foundation walls during excavation projects; most effective long-term barrier.

What Certified Contractors Assess During a Basement Evaluation

When a certified contractor from our network visits your home, they conduct a thorough assessment before recommending any solution. This includes:

• Identifying all water entry points — seams, cracks, pipe penetrations, wall-floor joint
• Determining whether water is coming through walls (lateral pressure), up from the floor (hydrostatic pressure), or both
• Evaluating the existing drainage situation inside and outside the home
• Checking the condition of any existing sump pump
• Assessing the basement floor slope and identifying the best sump pit location
• Reviewing exterior grading and downspout discharge near the foundation
• Providing a written scope of work and itemized quote at no charge

An honest contractor will tell you what you actually need — not the most expensive solution. Our certification process screens for contractors with a reputation for integrity and quality work.